# Signal Converter, Current, Voltage, Current, Voltage, 1 Channels, 0.3 %, 300 VDC
**URL**: https://novapart.co/products/DRST-AC/signal-converter-current-voltage-1-channels-03-300
**SKU**: DRST-AC
**Manufacturer**: OMEGA
**Category**: Automation & Process Control || Signal Conditioning || Signal Converters
**Price**: €336.5300
**Stock**: 10+
**Lead Time**: 50 days (indicative)
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Accuracy % | 0.3% |
| Product Range | - |
| Supply Voltage | 300VDC |
| Isolation Input | Isolated |
| No. Of Channels | 1 Channel |
| Output Accuracy | - |
| No. Of Output Channels | 1Channels |
| Signal Conditioner Input | Current, Voltage |
| Signal Conditioner Output | Current, Voltage |
| Signal Conditioner Mounting | DIN Rail |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:4199599/)
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TM
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## **User’s Guide**
_**Shop online at omega.com**_
_**e-mail: info@omega.com For latest product manuals: www.omegamanual.info**_
**DRST-AC Din Rail AC Transmitter**
## **omega.com info@omega.com Servicing North America:**
||**omega.com info@omega.com**
**Servicing North America:**|
|---|---|
|**U.S.A.**|Omega Engineering, Inc.|
|**Headquarters:**|Toll-Free: 1-800-826-6342 (USA & Canada only)|
||Customer Service: 1-800-622-2378 (USA & Canada only)|
||Engineering Service: 1-800-872-9436 (USA & Canada only)|
||Tel: (203) 359-1660
Fax: (203) 359-7700|
||e-mail: info@omega.com|
||**For Other Locations Visit omega.com/worldwide**|
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.
**Table of Contents DRST-AC MV Transmitter**
## **Table of Contents**
**Section ........................................................................ Page Section 1 Warning .......................................................................................... 5 Section 2 Safety Instructions ........................................................................ 6 Section 3 How to demount DRST Series ................................................... 7 Section 4 Universal AC/DC transmitter ..................................................... 8** Section 4.2 Application **.................................................................. 8** Section 4.3 Technical characteristics ............................................ 8 Section 4.4 Mounting / installation / programming **................ 8 Section 5 Signals/Connection ....................................................................... 9** Section 5.1 Input Signals **............................................................... 9** Section 5.2 Output Signals ............................................................ 9 Section 5.3 Power Connection **......................................................** 9 **Section 6 DRSL-DISPLAY/programming front ...................................... 10** Section 8.1 Mounting / demounting the DRSL-DISPLAY **.... 10 Section 7 Order ....................................................................................... 11-13 ............................................................. 13** Section 7.1 Specifications **Section 8 Configurable input error indication & input limits ....... 14-15 Section 9 DRSL-DISPLAY display readout ............................................. 16 Section 10 Connections ................................................................................. 17 Section 11 Block Diagram ............................................................................. 18 Section 12 Configuration / Operating the function keys ........................ 19 Section 13 Routing Diagram ................................................................... 21-26** Section 13.2 Advanced settings **.................................................. 25** Section 13.3 Help text overview **................................................. 25** Section 13.4 Document history **................................................... 26**
**3**
## **6 Product Pillars to meet your every need**
## Individually outstanding, unrivalled in combination
With our innovative, patented technologies, we make signal conditioning smarter and simpler. Our portfolio is composed of six product areas, where we offer a wide range of analog and digital devices covering over a thousand applications in industrial and factory automation. All our products comply with or surpass the highest industry standards, ensuring reliability in even the harshest of environments and have a 5-year warranty for greater peace of mind.
Our range of temperature transmitters and sensors provides the highest level of signal integrity from the measurement point to your control system. You can convert industrial process temperature signals to analog, bus or digital communications using a highly reliable point-to-point solution with a fast response time, automatic self-calibration, sensor error detection, low drift, and top EMC performance in any environment.
We deliver the safest signals by validating our products against the toughest safety standards. Through our commitment to innovation, we have made pioneering achievements in developing I.S. interfaces with SIL 2 Full Assessment that are both efficient and cost-effective. Our comprehensive range of analog and digital intrinsically safe isolation barriers offers multifunctional inputs and outputs, making Omega an easy-toimplement site standard. Our backplanes further simplify large installations and provide seamless integration to standard DCS systems.
We provide inexpensive, easy-to-use, future-ready communication interfaces that can access your installed base of products. The detachable DRSL-DISPLAY Local Operator Interface (LOI) allows for local monitoring of process values, device configuration, error detection and signal simulation. The next generation, our DRST-CM Remote Operator Interface (ROI) does all that and more, adding remote digital communications via Modbus/ RTU, while the analog output signals are still available for redundancy.
With the DRST-CM you can further expand connectivity with a gateway, which connects via industrial Ethernet, wirelessly through a Wi-Fi router.
Our unique range of single devices covering multiple applications is easily deployable as your site standard. Having one variant that applies to a broad range of applications can reduce your installation time and training, and greatly simplify spare parts management at your facilities. Our devices are designed for long-term signal accuracy, low power consumption, immunity to electrical noise and simple programming.
Our compact, fast, high-quality 6 mm isolators are based on microprocessor technology to provide exceptional performance and EMC-immunity for dedicated applications at a very low total cost of ownership. They can be stacked both vertically and horizontally with no air gap separation between units required.
Our display range is characterized by its flexibility and stability. The devices meet nearly every demand for display readout of process signals, and have universal input and power supply capabilities. They provide a realtime measurement of your process value no matter the industry, and are engineered to provide a user-friendly and reliable relay of information, even in demanding environments.
**1**
**Warning**
## **WARNING**
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**GENERAL**
This device is designed for connection to hazardous electric voltages. Ignoring this warning can result in severe personal injury or mechanical damage.
To avoid the risk of electric shock and fire, the safety instructions of this guide must be observed and the guidelines followed. The specifications must not be exceeded, and the device must only be applied as described in the following.
Prior to the commissioning of the device, this installation guide must be examined carefully.
Only qualified personnel (technicians) should install this device. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
## **WARNING**
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**HAZARD OUS VOLTAGE**
Until the device is fixed, do not connect hazardous voltages to the device. The following operations should only be carried out on a disconnected device and under ESD safe conditions:
General mounting, connection and disconnection of wires.
Troubleshooting the device.
**Repair of the device and replacement of circuit breakers must be done by Omega A/S only.**
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**CAUTION**
## **WARNING**
Do not open the front plate of the device as this will cause damage to the connector for the display / programming front DRSL-DISPLAY.
This device contains no DIP-switches or jumpers.
DRST Series must be mounted on a DIN rail according to DIN EN 60715.
## **Section 1.2 - Symbol Identification**
**Triangle with an exclamation mark:** Read the manual before installation and commissioning of the device in order to avoid incidents that could lead to personal injury or mechanical damage.
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**The CE mark** proves the compliance of the device with the essential requirements of the directives.
**The double insulation symbol** shows that the device is protected by double or reinforced insulation.
**5**
**2 Safety Instructions**
## **Section 2 - Safety instructions**
## **Definitions**
Hazardous voltages have been defined as the ranges: 75 to 1500 Volt DC, and 50 to 1000 Volt AC. Technicians are qualified persons educated or trained to mount, operate, and also trouble-shoot technically correct and in accordance with safety regulations.
Operators, being familiar with the contents of this manual, adjust and operate the knobs or potentiometers during normal operation.
## **Receipt and unpacking**
Unpack the device without damaging it and check whether the device type corresponds to the one ordered. The packing should always follow the device until this has been permanently mounted.
## **Environment**
Avoid direct sun light, dust, high temperatures, mechanical vibrations and shock, and rain and heavy moisture. If necessary, heating in excess of the stated limits for ambient temperatures should be avoided by way of ventilation. The device must be installed in pollution degree 2 or better.
## **Mounting**
Only technicians, who are familiar with the technical terms, warnings, and instructions in the manual and who are able to follow these, should connect the device. Should there be any doubt as to the correct handling of the device, please contact our Omega tech support.
Mounting and connection of the device should comply with national legislation for mounting of electric materials, i.e. wire cross section, protective fuse, and location.
Descriptions of input / output and supply connections are shown in the block diagram and side label.
The following apply to fixed hazardous voltages-connected devices:
The max. size of the protective fuse is 10 A and, together with a power switch, it should be easily accessible and close to the device. The power switch should be marked with a label indicating that it will switch off the voltage to the device.
Year of manufacture can be taken from the first two digits in the serial number.
## **UL installation requirements**
Use 60/75°C copper conducters only
For use only in pollution degree 2 or better
Max. ambient temperature 60°C Max. wire size AWG 26-14 UL file number E248256
## **Calibration and Adjustment**
During calibration and adjustment, the measuring and connection of external voltages must be carried out according to the specifications of this manual. The technician must use tools and instruments that are safe to use.
## **Normal operation**
Operators are only allowed to adjust and operate devices that are safely fixed in panels, etc., thus avoiding the danger of personal injury and damage. This means there is no electrical shock hazard, and the device is easily accessible.
## **Cleaning**
When disconnected, the device may be cleaned with a cloth moistened with distilled water.
## **Liability**
To the extent the instructions in this manual are not strictly observed, the custom er cannot advance a demand against Omega A/S that would otherwise exist according to the concluded sales agreement.
**6**
**How to demount DRST Series 3** ~~ODD~~
## **Section 3 - How to demount DRST-AC**
## **Picture 1:**
The device is detached from the DIN rail by moving the bottom lock down.
## **When front LED flashes red or DRSL-DISPLAY display shows AO.ER**
The DRST-AC is designed with a high safety level. Therefore, the device continuously measures the output current. If “S4-20” is selected during configuration, and output current drops to 0 mA, the DRSL-DISPLAY display will indicate “AO.ER” and the front LED will turn red. (A 0 mA output can be caused by an open output loop). The error mode can be reset by power cycling the device or stepping through the menu.
**7**
**4 Universal AC/DC transmitter**
## **Section 4.1 - Universal AC/DC transmitter**
- Measures AC current and voltage signals and converts these into uni-/bipolar DC current and voltage signals ~
- Outputs passive or active current signals
- Programming, process monitoring and diagnostics via DRSL-DISPLAY
- Response time < 0.75 s and excellent accuracy better than 0.3%
- Universally powered by 21.6…253 Vac / 19.2...300 Vdc
## **Application**
- The 0... 5 AAC range makes it possible to accurately measure a typical current transformer.
- The 0...300 VAC range allows accurate supply voltage monitoring.
- The DRST-AC measures standard input ranges, and can be freely configured to customer-defined input range.
- Converts narrow AC current / voltage inputs to wide bipolar or unipolar outputs, e.g. 0…1 VAC input = ±10 volt or 4...20 mA output with a minimum span of 0.5 AAC or 0.5 VAC.
- The detachable DRSL-DISPLAY displays provide enhanced diagnostics.
- Configurable input limits control the output value for increased safety.
## **Technical characteristics**
- The latest analog and digital techniques are used to obtain maximum accuracy and immunity to interference.
- Possibility of output safety readback by selecting S4...20 mA output.
- Response time < 0.75 s for measuring AC current / voltage signals.
- The current output can drive up to 800 Ohms, with an adjustable response time of 0.0…60.0 seconds.
- Exceptional mA output load stability of < 0.001% of span / 100 Ohm.
- Meets the NAMUR NE21 recommendations, ensuring high accuracy in harsh EMC environments.
- Meets the NAMUR NE43 recommendations, allowing the control system to easily detect an input error.
- Each unit is tested to a high 2.3 kVAC, 3-port galvanic isolation level.
- Excellent signal to noise ratio of > 60 dB.
## **Mounting / installation / programming**
- Very low power consumption means units can be mounted side by side without an air gap – even at 60°C ambient temperature.
- Configuration, monitoring, 2-point process calibration and more are accomplished using either the DRSL-DISPLAY detachable display or the DRST-CM detachable digital communication enabler.
- All programming can be password-protected.
**8**
**Signals/Connection 5**
**Section 5.1 - signals:**
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Current Voltage
44
43
(N)
42
(N)
41
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**Section 5.2 - Output signals:**
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+ V supply
Current & voltage
2-wire
12
+
14
+ 10 V 10 V
(±)
1 V 1 V
13
+ +
}
11
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## **Section 5.3 - Power connection:**
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21.6...253 VAC
or
19.2...300 VDC
33
32
31
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**9**
**6 DRSL-DISPLAY display / programming front** ~~Ae~~
## **Section 4.1 - Universal AC/DC transmitter**
## **Functionality**
The simple and easily understandable menu structure and the explanatory help texts guide you effortlessly and automatically through the configuration steps, thus making the product very easy to use. Functions and configuration options are described in the section ”Configuration / operating the function keys”.
## **Application**
- Communications interface for modification of operational parameters in DRST-AC.
- Can be moved from one DRST-AC device to another and download the configuration of the first unit to subsequent units.
- When mounted in the process, the display shows process values and device status.
## **Technical characteristics**
- LCD display with 4 lines:
- Line 1 (H=5.57 mm) shows the scaled process value - OK or error.
- Line 2 (H=3.33 mm) shows the selected engineering unit.
- Line 3 (H=3.33 mm) shows analog output or TAG no.
- Line 4 shows status for communication and signal trending.
- Programming access can be blocked by assigning a password. The password is saved in the device in order to ensure a high degree of protection against unauthorized modifications to the configuration.
## **Mounting/demounting the DRSL-DISPLAY/DRST-CM**
- 1: Insert the tabs of the DRSL-DISPLAY/DRST-CM into the holes at the top of the device.
- 2: Hinge the DRSL-DISPLAY/DRST-CM down until it snaps into place.
Demounting of the DRSL-DISPLAY/DRST-CM
- 3: Push the release button on the bottom of the DRSL-DISPLAY/DRST-CM and hinge the the DRSL-DISPLAY/DRST-CM out and up.
4: With the DRSL-DISPLAY/DRST-CM hinged up, remove from holes at the top of the device.
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1 4
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2
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3
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**10**
**Order 7**
## **Section 7 - Order**
## **DRST-AC = Universal AC/DC transmitter**
## **Accessories**
**DRSL-DISPLAY = Display/programming front DRST-CM = Communication enabler**
## **Electrical specifications**
Environmental conditions: Operating temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to 60°C Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to 85°C Calibration temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20...28°C Relative humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 95% RH (non-cond.) Protection degree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP20 Installation in pollution degree 2 & measurement / overvoltage category II.
## **Mechanical specifications:**
Dimensions (H x W x D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 x 23.5 x 104 mm Dimensions (H x W x D) w/DRSL-DISPLAY/DRST-CM . . . . . . . . . . 109 x 23.5 x 116 / 131 mm Weight approx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 g Weight incl. DRSL-DISPLAY/DRST-CM (approx.) . . . . . . . . . . . . . . 285 g / 350 g DIN rail type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DIN EN 60715 - 35 mm Wire size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.13...2.08 mm[2] / AWG 26...14 stranded wire Screw terminal torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 Nm
AWG 26...14 stranded wire
Common electrical specifications: Supply voltage, universal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.6...253 VAC, 50...60 Hz or 19.2...300 Vdc Max. required power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 1.8 W nom. Max. power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 2.5 W Isolation voltage - test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 kVac Isolation voltage - working . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 Vac (reinforced) / 500 Vac (basic) Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Communication enabler DRST-CM/ Programming front DRSL-DISPLAY Signal dynamics, input / output . . . . . . . . . . . . . . . . . . . . . . . . 20 bit / 18 bit Signal/noise ratio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 60 dB Response time (0...90%, 100...10%) . . . . . . . . . . . . . . . . . . . . . . . < 0.75 s Output referred common mode rejection ratio . . . . . . . . . . . . . . . . 0.02 ppm / VHz
**11**
**7**
**Order**
## **Accuracy, the greater of general and basic values:**
|General values|General values||
|---|---|---|
|Input type|Absolute accuracy|Temperature coefcient|
|All|≤ ±0.3% of span*|≤ ±0.01% of span* / °C|
||||
|Basic values|||
|Input type|Basic accuracy|Temperature coefcient|
|Current|1.5 mA|50 µA/ °C|
|Voltage|1.5 mVAC|50 µVAC /°C|
||||
|EMC - immunity infuence . . . . . . . . . . . . . . .
Extended EMC immunity:
NAMUR NE 21, A criterion, burst . . . . . . . . . . .||. . . . . . < ±0.5% of span*
. . . . . . < ±1% of span*|
of span = of selected standard range
* For custom signals, general accuracy and EMC specifications are 0.3% of full scale
## **Input specifications:**
**Current input:** Signal range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0...5 AAC / 40...400 Hz Maximum input limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.00 AAC @ 40°C Programmable measurement ranges . . . . . . . . . . . . . . . . . . . . . . 0...0.5, 0…1, 0…2.5 & 0...5 AAC Custom configurable signal range . . . . . . . . . . . . . . . . . . . . . . . 0….5 AAC / 40...400 Hz Min. span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 AAC Input resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nom. < 0.07 Ω **Voltage input:** Signal range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0...300 VAC / 40...400 Hz Programmable measurement ranges . . . . . . . . . . . . . . . . . . . . . . 0...0.5, 0...1, 0...2.83, 0…5, 0…120, 0…230 & 0…300 VAC Custom configurable signal range . . . . . . . . . . . . . . . . . . . . . . . 0...300 VAC / 40...400 Hz Min. span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 VAC Input resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nom. 3 MΩ || 100 pF **Configurable input limits: Configurable input limits, low:** VOLT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 VAC to ‘Minimum selected input’ CURR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 AAC to ‘Minimum selected input’ **Configurable input limits, high:** VOLT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ‘Maximum selected input’ to 300 VAC CURR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ‘Maximum selected input’ to 5 AAC
**12**
**Order 7**
## **Input limit low/high, error indication levels:**
UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See table on page 15 DOWN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See table on page 15 ZERO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See table on page 15 NONE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See table on page 15 Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5% of ‘Max. output’ Error detection release delay . . . . . . . . . . . . . . . . . . . . . . . . . . < 2.5 s Current output specifications:
## **Active unipolar and bipolar mA:**
Programmable ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0...20, 4...20, S4...20, ±10 and ±20 mA Direct or Inverted action V-curve function, 100-0-100% . . . . . . . . . . . . . . . . . . . . . . . . . . 20-0-20 mA Load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 800 Ω
## **Passive 2-wire mA:**
Programmable ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0...20 and 4...20 mA Direct or Inverted action V-curve function, 100-0-100% . . . . . . . . . . . . . . . . . . . . . . . . . . 20-0-20 mA External 2-wire loop supply . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5...30 V
## **Common specifications current output:**
All standard and custom ranges can be selected as Direct or Inverted action. V-function can be selected for fixed output ranges starting at zero.
Signal range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0...23 mA (unipolar) / -23...+23 mA (bipolar) Current limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 28 mA (unipolar) / ±28 mA (bipolar) Load stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 0.001% of span / 100 Ω Response time, programmable . . . . . . . . . . . . . . . . . . . . . . . . . 0.0...60.0 s Output limitation at outside range . . . . . . . . . . . . . . . . . . . . . . . See table on page 14 Voltage output specifications: All standard and custom ranges can be selected as Direct or Inverted action. V-function can be selected for fixed output ranges starting at zero. Programmable ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0/0.2...1, 0/1...5, 0/2...10, ±1, ±5 and ±10 V Direct or Inverted action V-curve function, 100-0-100% . . . . . . . . . . . . . . . . . . . . . . . . . . 1-0-1 V, 5-0-5 V and 10-0-10 V Load, min . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 500 kΩ Response time, programmable . . . . . . . . . . . . . . . . . . . . . . . . . 0.0...60.0 s Output limitation at outside range . . . . . . . . . . . . . . . . . . . . . . . See table on page 14 **Observed authority requirements:** EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2014/30/EU LVD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2014/35/EU RoHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2011/65/EU **Approvals:** c UL us, Standard for Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . UL 508 / C22.2 No. 14
**13**
**8 Configurable input error indication and input limits**
## **Section 8 - Configurable input error indication and input limits**
## Configurable input error detection
To increase system safety and integrity, users can program a high and low input error detection level. Input signals outside the selected error indication levels will cause the output of the device to go to the programmed error state. The error is indicated in display line 1 as IN.ER and at the same time the backlight flashes.
The two configurable input error detection levels can be set and enabled individually, just as it is possible to individually set the output error indication for each of the two detection levels. This allows users to differentiate process faults, broken input wires, etc.
Available output error states for each of the two detection levels are: UP, DOWN, ZERO and NONE.
Output error indication uses the error states defined by NAMUR NE43 for 4...20 mA output span, and for all other output spans equivalent output error indications are used (see table on page 14).
**Example - 4..20 mA output span and both high and low configurable input error limit enabled with output error indication set to ZERO:**
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**----- Start of picture text -----**
Device Configurable input Configurable input Device
Min. input limit, low Normal measuring range limit, high Max. input
Extended measuring range
20.5 mA
20.0 mA
4.0 mA
3.8 mA
Input:
ARMS,
Error current Error current VRMS
etc.
Output error indication = ZERO
Output error current can be Output error current can be
individually set to: individually set to:
ZERO: 0 mA ZERO: 0 mA
UP: 23 mA UP: 23 mA
DOWN: 3.5 mA DOWN: 3.5 mA
DISABLED: No error indication, DISABLED: No error indication,
output limited to 3.8 mA output limited to 20.5 mA
Example - input limits disabled:
‘Min. selected ‘Max. selected
input’ - 15% Normal measuring range input’ + 15%
Extended measuring range
20.5 mA
20.0 mA
4.0 mA
3.8 mA
Input:
ARMS,
VRMS
etc.
Output error indication = NONE
Normal range
Extended working range
Normal range
Extended working range
**----- End of picture text -----**
**14**
**8**
**Configurable input error indication and input limits**
||Input limit check
disabled|Input limit check
disabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|
|---|---|---|---|---|---|---|---|---|
|Output
span|Output
limit low|Output
limit high|Output
limit low|Output
limit high|Output
error
indication,
UP|Output
error
indication,
DOWN|Output
error
indication,
ZERO|Output
error
indication,
NONE|
|4...20 mA|0 mA|23 mA|3.8 mA|20.5 mA|23 mA|3.5 mA|0 mA|No error
indication|
|0...20 mA|0 mA|23 mA|0 mA|20.5 mA|23 mA|0 mA|0 mA|No error
indication|
|±10 mA|-11.5 mA|11.5 mA|-10.25 mA|10.25 mA|11.5 mA|-11.5 mA|0 mA|No error
indication|
|±20 mA|-23 mA|23 mA|-20.5 mA|20.5 mA|23 mA|-23 mA|0 mA|No error
indication|
||Input limit check
disabled|Input limit check
disabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|Input limit check Low and / or High enabled|
|---|---|---|---|---|---|---|---|---|
|Output
span|Output
limit low|Output
limit high|Output
limit low|Output
limit high|Output
error
indication,
UP|Output
error
indication,
DOWN|Output
error
indication,
ZERO|Output
error
indication,
NONE|
|0...1 V|0 V|1.15 V|0 V|1.025 V|1.15 V|0 V|0 V|No error
indication|
|0.2...1 V|0 V|1.15 V|0.195 V|1.025 V|1.15 V|0.175 V|0 V|No error
indication|
|0...5 V|0 V|5.75 V|0 V|5.125 V|5.75 V|0 V|0 V|No error
indication|
|1...5 V|0 V|5.75 V|0.975 V|5.125 V|5.75 V|0.875 V|0 V|No error
indication|
|0...10 V|0 V|11.5 V|0 V|10.25 V|11.5 V|0 V|0 V|No error
indication|
|2...10 V|0 V|11.5 V|1.95 V|10.25 V|11.5 V|1.75 V|0 V|No error
indication|
|±1 V|-1.15 V|1.15 V|-1.025 V|1.025 V|1.15 V|-1.15 V|0 V|No error
indication|
|±5 V|-5.75 V|5.75 V|-5.125 V|5.125 V|5.75 V|-5.75 V|0 V|No error
indication|
|±10 V|-11.5 V|11.5 V|-10.25 V|10.25 V|11.5 V|-11.5 V|0 V|No error
indication|
**15**
**9 DRSL-DISPLAY/DRST-CM display readout**
## **Section 9.1 DRSL-DISPLAY/DRST-CM display readout**
## **Display readout of input error detection and signal ”outside range”**
|Configurable input error detection - readout (IN.ER):|Configurable input error detection - readout (IN.ER):|Configurable input error detection - readout (IN.ER):|Configurable input error detection - readout (IN.ER):|Configurable input error detection - readout (IN.ER):|Configurable input error detection - readout (IN.ER):|
|---|---|---|---|---|---|
|Input|Range|||Readout|Limit|
|CURR|All|||IN.ER|See table onpage 14|
|VOLT|All|||IN.ER|See table onpage 14|
|||||||
|Displayreadout below min. / above max. (-1999, 9999):||||||
|Input|Range|||Readout|Limit|
|All|All|||-1999|Displayreadout <-1999|
|||||9999|Displayreadout >9999|
|||||||
|Readout at hardware error||||||
|Error search||Readout|Cause|||
|Check measurement of analog output||AO.ER|No load on the current output (only S4...20 mA)*|||
|Communications test between
DRSL-DISPLAY/DRST-CM and DRST-AC||NO.CO|Connection error|||
|Configuration error||CO.ER|Default configuration is loaded|||
|Configuration error||CO.ER|Invalid configuration**|||
|Check that saved configuration in
DRSL-DISPLAY/DRST-CM matches device||TY.ER|Invalid type or rev. no.|||
|Hardware error||RA.ER|RAM error*|||
|Hardware error||AD.ER|A/D converter error*|||
|Hardware error||AO.SU|Analogoutput supplyerror*|||
|Hardware error||EF.ER|External flash error*|||
|Hardware error||IF.ER|Internal flash error*|||
All error indications in the display flash once per second. The help text explains the error. If the error is an ! input loop error, the display backlight flashes as well - this is acknowledged (stopped) by pushing the 3 button. * Error is acknowledged by either stepping through the basic setup, or by resetting the device power. Some types of errors can only be acknowledged by resetting the device power. ** Error is acknowledged by stepping through the basic setup.
**16**
**Connections 10**
## **Section10.1 - Connections**
## Supply
**==> picture [70 x 34] intentionally omitted <==**
**----- Start of picture text -----**
31 32 33
**----- End of picture text -----**
## Inputs:
**==> picture [164 x 46] intentionally omitted <==**
**----- Start of picture text -----**
Current Voltage
41 42 43 44 41 42 43 44
**----- End of picture text -----**
## Outputs:
**==> picture [351 x 86] intentionally omitted <==**
**----- Start of picture text -----**
Current 2-wire transmitter Voltage, 1 V Voltage, 10 V
11 12 13 14 11 12 13 14 11 12 13 14 11 12 13 14
- mA + mA + - V + - V +
-
(±) (±) (±)
**----- End of picture text -----**
**17**
**11 Block Diagram**
## **Section11.1 - Block Diagram**
**==> picture [535 x 207] intentionally omitted <==**
**----- Start of picture text -----**
33 Supply
44 32 21.6...253 VAC or
N.C.
Red 19.2...300 VDC
HW 31 Supply
Watchdog
43
D / A 12 I+
(N) 42 A/D CPU Green A
Current 14 10 V
input 500
Voltage 41 50 13 1 V A +-
input
V V A
11 I- / V-
DRST-AC 4179 I + V V I I
**----- End of picture text -----**
**18**
**Configuration / Operating the function keys 12**
## **Section 12.1 - Configuration / operating the function keys**
Documentation for routing diagram.
## In general
When configuring the DRST-AC, you will be guided through all parameters and you can choose the settings which fit the application. For each menu there is a scrolling help text which is automatically shown in line 3 on the display.
Configuration is carried out by use of the 3 function keys:
- 1 will increase the numerical value or choose the next parameter
- 2 will decrease the numerical value or choose the previous parameter
- 3 will save the chosen value and proceed to the next menu
When configuration is completed, the display will return to the default state 1.0. Pressing and holding 3 will return to the previous menu or return to the default state (1.0) without saving the changed values or parameters. If no key is activated for 1 minute, the display will return to the default state (1.0) without saving the changed values or parameters.
## Further explanations
Password protection: Programming access can be blocked by assigning a password. The password is saved in the device in order to ensure a high degree of protection against unauthorised modifications to the configuration. Default password 2008 allows access to all configuration menus.
## Signal and sensor error indication via display front DRSL-DISPLAY/DRST-CM
Error indication is displayed in line 1 as text and at the same time the backlight flashes. A flashing bullet in line 4 is indicating correct functioning of DRST-DISPLAY.
## Signal and sensor error indication without display front
Status of the unit can also be read from the red/green LED in the front of the device.
- Green flashing LED 13 Hz indicates normal operation.
- Green flashing LED 1 Hz indicates loop error.
- Steady green LED indicates internal error.
- Steady red LED indicates fatal error.
## Advanced functions
The unit gives access to a number of advanced functions which can be reached by answering “Yes” to the point “ADV.SET”.
Memory (MEM): In the memory menu you can save the configuration of the device in the DRST-DISPLAY, and then move the DRST-DISPLAY onto another device of the same type and download the configuration in the new device.
Display setup (DISP): Here you can adjust the brightness contrast and the backlight. Setup of TAG numbers with 6 alphanumerics. Selection of functional readout in line 3 of the display - choose between readout of analogue
**19**
**12 Configuration / Operating the function keys**
## **Section 12.1 - Configuration / Operating the function keys**
output or tag no.
Two-point process calibration (CAL): The device can be process-calibrated in 2 points to fit a given input signal . A low input signal (not necessarily 0%) is applied and the actual value is entered via DRSL-DISPLAY/DRST-CM Then a high signal (not necessarily 100%) is applied and the actual value is entered via DRSL-DISPLAY/DRST-CM. If you accept to use the calibration, the device will work according to this new adjustment. If you later reject this menu point or choose another type of input signal the device will return to factory calibration.
Process simulation function (SIM): In the menu point “EN.SIM” it is possible to simulate an input signal by means of the arrow keys and thus control the output signal up or down. You must exit the menu by pressing 3 (no time-out). The simulation function exits automatically, if the DRSL-DISPLAY/DRST-CM is detached.
Password (PASS): Here you can choose a password between 0000 and 9999 in order to protect the unit against unauthorised modifications to the configuration. The unit is delivered default without password.
Language (LANG): In the menu ”LANG” you can choose between 7 different language versions of help texts that will appear in the menu. You can choose between UK, DE, FR, IT, ES, SE and DK.
Output function (OFUN): Here the output characteristics can be set to either Direct (DIR) or Inverted (INV) function. Output type and range are set in the normal programming menu. If the selected output range is starting at zero, V-curved output function (VFUN) can also be selected. The output characteristics will then be 100-0-100% on the basis of a linear 0-100% input signal.
## Auto diagnostics
The device performs an advanced auto diagnosis of the internal circuits - check tables on page 15.
**20**
**Routing Diagram 13**
## **Section 13.1 - Routing diagram**
If no key is activated for 1 minute, the display will return to the default state 1.0 without saving configuration changes.
- 1 Increase value / choose next parameter
- 2 Decrease value / choose previous parameter
3 Save the chosen value and proceed to the next menu
Hold 3 Back to previous menu / return to menu 1.0 without saving.
**==> picture [494 x 501] intentionally omitted <==**
**----- Start of picture text -----**
0-5
0-2.5
0-1
Power up
0000 NO CURR 0-0.5 300 300
9999 YES VOLT CUST 0.00 0.00
40.0
% OK 0000 Correct OK NO No OK VOLT CURR OK 0-5 OK 0.00 OK 230 OK
10.4 mA PASSW. ADV.SET IN TYPE I.RANGE IN.LO IN.HI
Txt 1 Txt 2 Txt 3 Txt 4 Txt 48 Txt 49
*0 *1 Yes *7 *9 *7 *8 *9
0-300
and held: 0-230
Toggle line 3 function 0-120
A.Out / TAG.
0-5
(Setting is volatile -
0-2.83
use DISP setup menu
to change and store 0-1
line 3 function). 0-0.5
CUST
VOLT
OK 0-230 OK
V.RANGE
Txt 5
NO
YES
YES OK
ADV.SET Continued on the page
Txt 2 Routing diagram ADV.SET
*0 Default state. *7 Only displayed if CUST is selected!
Line 1 shows the scaled process value - OK or error. This menu will change range automatically.
Line 2 shows the selected engineering unit.
Line 3 shows analogue output or TAG no.
Line 4 shows status for communication and signal trending. *8 Value will be forced to be greater than
xx.LO.
*1 Only displayed if password is enabled. *9 Maximum and minimum value selectable
from menu must be based on input type
VOLT: Min: 0.000 Max: 300
CURR: Min: 0.000 Max: 5.00
**----- End of picture text -----**
**21**
**13 Routing Diagram**
**==> picture [399 x 409] intentionally omitted <==**
**----- Start of picture text -----**
blank
:
: 111.1 -/+20
-/+10
% 11.11
@C@F 1.1111111 -99999999 -99999999 CURRVOLT S4-204-200-20 ACTIPASS
CURR
UNIT 1.111 0.00 5.000 OK CURR OK 4-20 OK ACTI OK
A RMS DEC.P DISP.LO DISP.HI ANA.OUT O.RANGE OUT.MOD
Txt 10 Txt 11 Txt 13
Txt 6 Txt 7 Txt 8 Txt 9 *3 *2
-/+10 1-5
-/+5 0-5
-/+1 0.2-1
2-10 0-1
0-10
VOLT
OK 0-10 OK
O.RANGE
Txt 12
*3
Selectable UNITS:
°C in m MW yd
°F in/h m/h MWh VRMS
% in/min m/min N ARMS
A in/s m/s Ohm [blank]
bar ips m/s2 Pa
cm K m3 pH
ft kA m3/h rpm
ft/h kg m3/min s
ft/min kJ mA S
ft/s kPa mbar t
g kV mils t/h
gal/h kW min uA
gal/min kWh mm um
GW l mm/s uS
hp l/h mol V
hPa l/min Mpa W
Hz l/s mV Wh
**----- End of picture text -----**
**22**
**Routing Diagram 13**
**==> picture [568 x 109] intentionally omitted <==**
**----- Start of picture text -----**
UP UP
ZERO ZERO
YES 0.00 DOWN YES 300 DOWN 60.0
NO 0.00 NONE NO 230 NONE 0.0
NO OK 0.00 UP OK YES OK 230 UP OK 0.0 OK
To default state
ILIM.L VRMS OUT.ERR ILIM.H VRMS OUT.ERR RESP. 1.0
Txt 50 Txt 51 Txt 54 Txt 52 Txt 53 Txt 54 Txt 15
*15 *16
NO NO
**----- End of picture text -----**
**23**
**13 Routing Diagram**
## **Section 13.2 - advanced settings (ADV.SET)**
**==> picture [591 x 644] intentionally omitted <==**
**----- Start of picture text -----**
MEM, DISP, *6 VFUN (V-shaped output function) is only available when a
PASS, LANG,CAL, SIM, SAVE *5 Selectable range as defined by DEC.P, DISP.LO and DISP.HI. fixed output range starting at zero is seleceted.DIR (direct) and INV (inverted) output can be combined with
LOAD all fixed or CUST output ranges.
OFUN
MEM OK SAVE OK
SETUP MEMORY
Txt 15/1 Txt 16
9 9 9 TAG
0 0 A A.OUT
DISP OK 3 OK 9 OK OK A.OUT OK
SETUP CONTRA LIGHT TAGNO_ LINE 3
Txt 15/2 Txt 17 Txt 18 Txt 19 Txt 20
YES 5.000 YES 5.000 YES
NO 0.000 NO 0.000 NO
CAL OK NO OK 0.000 OK NO OK 5.000 OK NO OK
SETUP CAL.LO A RMS CAL.HI A RMS USE.CAL
Txt 15/3 Txt 21 Txt 22 Txt 23 Txt 24 Txt 25
*5 *5
NO NO
YES 5.000
To default state
NO 0.000
1.0
SIM OK NO OK 2.500 OK
SETUP ENA.SIM A RMS
Txt 15/4 Txt 26 Txt 27 In the submenu simulation (SIM) you must press 3 or remove
*5 the DRSL-DISPLAY/DRST-CM to return to the default state 1.0.
NO
YES 9999
NO 0
PASS OK NO OK 0 OK
SETUP EN.PASS NEW.PAS
Txt 15/5 Txt 28 Txt 29
NO
DE, DK, ES, FR,
IT, SE, UK
LANG OK UK OK
SETUP LANGUA.
Txt 15/6 Txt 30
VFUN
INV
DIR
OFUN OK DIR OK
SETUP O.FUNC
Txt 15/7 Txt 31
24
**----- End of picture text -----**
**Routing Diagram 13**
## **Section 13.3 - Help text overview**
- [1] Set correct password
- [2] Enter advanced setup menu?
- [3] Select current input Select voltage input
- [4] Select 0...5 A input range Select 0...2.5 A input range Select 0...1 A input range Select 0...0.5 A input range Select custom current input range
- [5] Select 0...230 V input range Select 0...120 V input range Select 0...2.83 V input range Select 0...1 V input range Select 0...0.5 V input range Select custom voltage input range
- [6] Select display unit
- [7] Select decimal point position
- [8] Set display range low
- [9] Set display range high
- [10] Select current as analog output type Select voltage as analog output type
- [11] Select 0...20 mA output range Select 4...20 mA output range Select 4...20 mA with safety readback Select -10...10 mA output range Select -20...20 mA output range
- [13] Select active output mode Select passive output mode
- [14] Set Analog output response time in seconds
- [15] Select Analog Output Function Enter Language setup Enter Password setup Enter Simulation mode Perform Process calibration Enter Display setup Perform Memory operations
- [16] Load saved configuration into module Save configuration in display front
- [17] Adjust LCD contrast
- [18] Adjust LCD backlight
- [19] Write a 6-character device TAG
- [20] Analog output value is shown in display line 3 Device TAG is shown in display line 3
- [21] Calibrate Input low to process value? [22] Set value for low calibration point
- [23] Calibrate Input high to process value?
- [24] Set value for high calibration point [25] Use process calibration values?
- [26] Enable simulation mode?
- [12] Select 0.0...1 V output range Select 0.2...1 V output range Select 0...5V output range Select 1...5V output range Select 0...10V output range Select 2...10V output range Select -1...1 V output range Select -5...5 V output range Select -10..10 V output range
**25**
**13**
**Help text overview**
|[27]|Set the input simulation value|
|---|---|
|[28]|Enable password protection?|
|[29]|Set new password|
|[30]|Select language|
|[31]|Select direct output mode|
||Select inverted output mode|
||Select V-function output mode|
|[32]|Display underrange|
|[33]|Display overrange|
|[34]|Input underrange|
|[35]|Input overrange|
|[36]|Analog output supply error|
|[37]|Analog output error - check output connections and reset power|
||Configuration error - default configuration is loaded|
|[38]|RAM memory error|
|[39]|Invalid configuration|
|[40]|A/D converter error|
|[41]|No communication|
|[42]|Input range limit error - Input outside configurable input range limit|
|[44]|Invalid configuration type or version|
||External flash error|
|[45]|Internal flash error|
|[46]|Set input range low|
|[47]|Set input range high|
|[48]|Enable configurable input limit, low|
|[49]|Set configurable input limit, low|
|[50]|Enable configurable input limit, high|
|[51]|Set configurable input limit, high|
|[52]|Select downscale at error|
|[53]|Select zero output at error|
|[54]|Select upscale at error|
||Select no error action - output undefined at error|
## **Section 13.4 - Document history**
The following list provides notes concerning revisions of this document.
Rev. ID Date Notes 100 1740 Initial release of the product
**26**
## **WARRANTY/DISCLAIMER**
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of **13 months** from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal **one (1) year product warranty** to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not limited to contact points, fuses, and triacs.
**OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.**
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a manner.
## **RETURN REQUESTS/INQUIRIES**
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.
FOR **WARRANTY** RETURNS, please have the following information available BEFORE contacting OMEGA:
1. Purchase Order number under which the product was PURCHASED,
2. Model and serial number of the product under warranty, and
3. Repair instructions and/or specific problems relative to the product.
FOR **NON-WARRANTY** REPAIRS, consult OMEGA for current repair charges. Have the following information available BEFORE contacting OMEGA:
1. Purchase Order number to cover the COST of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and engineering.
OMEGA is a trademark of OMEGA ENGINEERING, INC.
© Copyright 2018 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.
# **Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course!** _**Shop online at omega.com**_
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---
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