# Digital Panel Meter, 3.5 Digit, AC Current, 5 A to 10 A, Red Display

![Product image](https://novapart.co/image/farnell:4062025/)

**URL**: https://novapart.co/products/DMR35-ACA2-AC1-R/digital-panel-meter-35-digit-ac-current-5-a-to-10
**SKU**: DMR35-ACA2-AC1-R
**Manufacturer**: MURATA
**Category**: Automation & Process Control || Panel Displays & Instrumentation || Panel Instrumentation || Digital Panel Meters
**Price**: €93.2200
**Stock**: 10+
**Lead Time**: 274 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Meter Range | 5A to 10A |
| Digit Height | 11.4mm |
| Product Range | DMR35-ACA Series |
| Meter Function | AC Current |
| Panel Cutout Width | - |
| Supply Voltage Max | 264VAC |
| Supply Voltage Min | 100VAC |
| Panel Cutout Height | - |
| No. Of Digits / Alpha | 3.5 |
| Operating Temperature Max | 50°C |
| Operating Temperature Min | 0°C |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4062025/)

## januRataMurata Power Solutions| Ps 

## - DMR35 ACA/mA Series 

AC Ammeter 

## FEATURES 

- Full-scale measurement of AC Current 

- Highly visible 3-1/2 digit LED display with adjustable intensity 

- Responsive bar-graph display provides indication of rapidly changing inputs, emulating analog movement meters 

- Measurement accuracy within 1% of reading + 4 counts 

- Selectable True RMS  or Average Reading  modes 

- Precision internal shunt resistor 

- Switch configurable settings simplify adaptation for use in a wide range of applications 

- Low burden voltage (<100mV) 

- Rugged Polycarbonate Housing 

- Mechanical drop-in replacement for common analog-movement meters 

- Operates from an external 100-264 VAC power supply source 

- Low power consumption, typically 15 mA at 120 VAC 

- Two-year warranty 

~~W~~ File: E156931 Vol. D1 s ~~ts~~ ©CE UK For full details go to www.murata-ps.com/rohs 

## PRODUCT OVERVIEW 

DMR35-ACA/mA series panel meters measure AC current, from 100mA to 10A, displayed in up to 3-1/2 digits of resolution and features a 21segment bar-graph for tracking rapidly changing inputs. Internal precision shunt resistors simplify setup and provide increased accuracy compared with solutions relying on external shunt resistors. Basic safety isolation between the measurement and power inputs is provided. 

Rear-accessible DIP switches are provided to set Measurement Mode, Input Range and Display Brightness. 

This meter is capable of displaying True RMS Mode,  for compatibility with modern digital multimeters as well as Average Reading Mode, for compatibility with legacy analog meters 

## APPLICATIONS 

These meters are packaged in a rugged polycarbonate housing and designed for drop-in replacement of most 2-1/2” form-factor analogmovement meters. 

Ideal for use in laboratory instrumentation, factory automation, and other applications requiring precise full-scale AC voltage monitoring. 

- www.murata ps.com 

DMR35-ACA.A01.D04   Page 1 of 11 

AC Ammeter 

## - DMR35 ACA/mA Series 

## Murata Power Solutions 

|ORDERING INFORMATION:|ORDERING INFORMATION:|
|---|---|
|MODEL NUMBER|DESCRIPTION|
|DMR35-ACA1-AC1-R|AC Ammeter, 1-3A ranges, 100-264 VAC powered, red display|
|DMR35-ACA2-AC1-R|AC Ammeter, 5-10A ranges, 100-264 VAC powered, red display|
|DMR35-ACMA-AC1-R|AC Milliammeter, 100-500mA ranges, 100-264 VAC powered, red display|



## SIMPLIFIED BLOCK DIAGRAM 

**==> picture [63 x 8] intentionally omitted <==**

**----- Start of picture text -----**<br>
Rear Panel View:<br>**----- End of picture text -----**<br>


- www.murata ps.com 

DMR35-ACA.A01.D04   Page 2 of 11 

AC Ammeter 

## - DMR35 ACA/mA Series 

## Murata Power Solutions 

|SPECIFICATIONS:<br>~~|~~|SPECIFICATIONS:<br>~~|~~|SPECIFICATIONS:<br>~~|~~|SPECIFICATIONS:<br>~~|~~|SPECIFICATIONS:<br>~~|~~|
|---|---|---|---|---|
|Measurement Performance|Min|Typ.|Max|Units|
|Measurement Ranges|||||
|DMR35-ACA1||0-1, 0-1.5, 0-2, 0-3||A|
|DMR35-ACA2||0-5, 0-7.5, 0-10||A|
|DMR35-ACMA|0-100, 0-200, 0-250, 0-500|||mA|
|Accuracy (25°C, 60 Hz sinusoidal input)||1% of reading +4 counts|||
|Temperature Stability (full-scale measurement)||0.02||% /°C|
|Measurement Modes|Mean (Average) and True RMS, DIP Switch selectable||||
|Measurement Frequency Range1|20||120|Hz|
|Input Signal Crest Factor|1||3||
|Burden voltage at highest range, full-scale input current2|||||
|DMR35-ACA1 (3 A)||70||mV|
|DMR35-ACA2 (10 A)||90||mV|
|DMR35-ACMA1 (500mA)||50||mV|
|Isolation/Hipot (power input terminals to<br>measurement input terminals)3||2150||VDC|



> 1 Frequency range over which measurement is stable to within ± 1% with sinusoidal input 

2 Burden Voltage’ is the voltage drop across the meter when measuring a current. Burden voltage is specified for a given input current – In this case the maximum rated current at the highest measurement range 

3100% Tested in production, applied for 2 seconds 

|Power Supply Characteristics|Min|Typ.|Typ.||Max|Units|
|---|---|---|---|---|---|---|
|Power Supply Voltage|100||||264|VAC|
|Power Supply Frequency|47||||63|Hz|
|Power Supply Current|||||||
|…at 120 VAC||15|15|||mA|
|…at 240 VAC||10|10|||mA|
|Display & User Interface|||||||
|Display Type & Size|3-1/2 digit 7-segment, 11.4mm (0.45 in.) high<br>21 segment curved bar-graph||||||
|Display Color|Red (625nm)||||||
|Decimal Point Selection|Automatic||||||
|Out-of-range Indication|Flashing display||||||
|Measurement Range Selection|Dipswitch selectable (4 ranges)||||||
|Measurement Mode Selection|Dipswitch selectable (Mean Reading (Average) or True RMS)||||||
|Display Intensity Control|Dipswitch selectable (4 ranges)||||||
|Terminal Blocks|||||||
|Wire Size|||14-24 AWG||||
|Insulation Strip Length|||6mm (0.24 in.)|6mm (0.24 in.)|||
|Screw Tightening Torque||0.4 N-m (3.5 lb.||m (3.5 lb.-in)|||
|Operating Temperature1|0||||50|°C|
|Storage Temperature|-40||||70|°C|
|Humidity (non-condensing)|0||||85|%RH|
|Sealing (front face, when installed with included<br>gasket)||Splash and dust resistant||Splash and dust resistant|||
|Mounting screws (4 included)|#4-20 0.5”thread forming||||||
|Screw Tightening Torque||9 in-lb (1 N|lb (1 N-m)||||
|Panel thickness when used with included<br>mounting screws|0.062 in. (1.6mm)|||0.25 in. (6.3mm)|0.25 in. (6.3mm)||
|Weight||2.5 (71)||||oz. (g)|



1 Maximum operating temperature applies to both front face and rear of housing. Unit must not be installed so that the rear of housing is exposed to more than the maximum operating temperature when powered. 

- www.murata ps.com 

DMR35-ACA.A01.D04   Page 3 of 11 

## - DMR35 ACA/mA Series 

## Murata Power Solutions 

## AC Ammeter 

## NOMINAL OUTLINE DIMENSIONS 

## Panel Drill Template 

## Panel Mounting Details 

**==> picture [93 x 21] intentionally omitted <==**

**----- Start of picture text -----**<br>
tO<br>**----- End of picture text -----**<br>


|ITEM<br>NO.<br>~~ee~~|DESCRIPTION<br>~~ee~~|QTY.<br>~~ee~~|NOTES<br>~~ee~~|
|---|---|---|---|
|1<br>~~ee~~|DMR35panel meter<br>~~ee~~|1<br>~~ee~~|Shown for reference<br>~~ee~~|
|2|Gasket|1|Included with DMR35 panel<br>meter|
|3|Provided screws are<br>compatible with panel<br>Thickness:<br>1/16” –¼”|REF|Panel shown for reference|
|4|4-20 x ½” thread forming<br>screw|4|Torque: 9 IN-LB (1 N-m)<br>Included with DMR35 panel<br>meter|



- www.murata ps.com 

DMR35-ACA.A01.D04   Page 4 of 11 

## - DMR35 ACA/mA Series 

## Murata Power Solutions 

## AC Ammeter 

## OPERATION, MEASUREMENT TYPE, CAPABILITIES 

DMR35 series employ precision, low power electronics to provide high performance measurement of full-scale measure of AC current. The following illustrations describe the features and operation to simplify deployment in a wide variety of systems. FRONT PANEL LAYOUT AND FUNCTION 

**==> picture [37 x 18] intentionally omitted <==**

**----- Start of picture text -----**<br>
oo<br>**----- End of picture text -----**<br>


Bar-graph Display: The 21-segment bar-graph display responds quickly and smoothly like an analog meter movement to aid in reading rapidly changing measurements. 

Numeric Display: The 3-1/2 digit display provides precise numerical measurements for steady-state and slowly changing measurement values. 

REAR PANEL LAYOUT AND FUNCTION 

|Terminal<br>Position No.|Name|Function|
|---|---|---|
|1|PWRA|Power supply input terminals (100-264 VAC,|
|2|PWRB|50/60Hz)|
|3<br>4|INA<br>INB|Current measurement input terminals|



DIP Switch Settings: Comprised of five individual switches for configuration as follows: 

configure display intensity (SW1-SW2), measurement mode (SW3), and measurement range (SW4-SW5) 

Notes: 

- 1) Ensure all screw-terminals are tightened in accordance with the torque specifications for reliable operation. 

- 2) Stranded wire is recommended for high-vibration applications. 

- 3) Basic safety isolation is provided between the meter’s measurement and input power electronics, no connection from the measurement-point and AC input power is required 

- 4) External fusing for input power and or measurement source may be required. It is incumbent upon the end-user to ensure all local electrical safety regulations and external fusing requirements are followed where-ever this meter is deployed 

## CONNECTION EXAMPLE 

In this applcaition, the DMR-ACAx is configured for simple current measurement where a common power and load connection point is shared. 

- www.murata ps.com 

DMR35-ACA.A01.D04   Page 5 of 11 

AC Ammeter 

## anuRata |Ps 

## - DMR35 ACA/mA Series 

~~Ce~~ METER CONFIGURATION Five configuration switches are provided to configure measurement range, measurement mode, and display intensity. 

Measurement Range: Switches 4 and 5: 

||||Switch Setting|Switch Setting|Switch Setting||DMR35 Model||
|---|---|---|---|---|---|---|---|---|
|||4|5||Dipswitch|-ACA1|-ACA2|-ACMA|
|||OFF|OFF||‘00|0-1 A AC|0-5 A AC|0-100 mA AC|
|||OFF|ON||(080|0-1.5 A AC|0-7.5 A AC|0-200 mA AC|
|||ON|OFF||(08|0-2 A AC|0-10 A AC|0-250 mA AC|
|||ON|ON||(08|0-3 A AC|0-10 A AC|0-500 mA AC|
|Measurement Mode:|||Switch 3:||||||
|||Switch Settingb<br>3||byPosition No.<br>Dipswitch|||Measurement Mode||
|||OFF|||‘000|‘Average’ Reading (RMS adjusted)|||
|||ON|||(0600||RMS Reading||
|Display Intensity:||ay Intensity:Switches 1 and 2:||Switches 1 and 2:|Switches 1 and 2:||||
|||1|Switch Setting by Position No.<br>2|Switch Setting by Position No.<br>Dipswitch|||Display Intensity||
|||OFF|OFF||2000||Low||
|||OFF|ON||25000||Medium||
|||ON|OFF||000||High||
|||ON|ON||an|High 2<br>(Subtle increase in intensity compared with ‘High’ setting)|||



- www.murata ps.com 

DMR35-ACA.A01.D04   Page 6 of 11 

## - DMR35 ACA/mA Series 

## Murata Power Solutions 

## AC Ammeter 

## RMS MEASUREMENT MODE VS. AVERAGE MEASUREMENT MODE 

These meters are capable of both RMS and Average Reading (RMS adjusted) measurement modes: 

RMS (Root-Mean-Square) Mode –   RMS current can be thought of as the equivalent DC current required to dissipate a given amount of energy in a resistive load. Benefit of RMS measurements: 

- Provides an indication of delivered power, independent of the exact waveform being measured 

- Comparable with most high-quality handheld multimeters that tend to adapt RMS measurement 

RMS Measurement Signal Flow. 

Average-Reading mode – is a measurement of the average rectified value of the current waveform. Since the resultant measurement differs from that of RMS, it is typically ‘adjusted’ to match what an RMS value would be if it were measuring a sinusoidal waveform. The benefit of this measurement mode is it enables DMR35 meters to provide measurements comparable to those provided by many electro-mechanical analog meters. 

RMS-adjusted Average Measurement Signal Flow 

Note that both measurement modes adapt a digital high-pass filter, placed after the ADC, to remove any DC bias from the input signal and generate a signal that is symmetric about zero. As a result, these meters only measure the AC component of the input signal, and not the DC component – a DC signal presented to the meter will read as zero.   Significant amounts of DC input signal, however, may force the meter’s ADC into over-range and reduce measurement accuracy. For this reason, the DMR35-ACA/mA series of meters should not be used to measure currents having a significant DC component. 

## Crest Factor 

When making AC measurements, the shape of the waveform to be measured can influence the measurement results. One of the most basic metrics used to quantify waveform shape is crest factor, which is defined as the ratio between the waveform’s peak value and its RMS value. 

**==> picture [126 x 25] intentionally omitted <==**

- www.murata ps.com 

DMR35-ACA.A01.D04   Page 7 of 11 

AC Ammeter 

## /nRata Murata Power Solutions| Ps 

## - DMR35 ACA/mA Series 

## (CONTINUED): ~~ee~~ RMS MEASUREMENT MODE VS. AVERAGE MEASUREMENT MODE 

In the case of a sinusoidal waveform, the figure below shows the relevant quantities. 

**Peak = 1.000 RMS ≈  0.707 ‘Average’ ≈ 0.637 0** The table below lists the crest factor, RMS and average values for various familiar waveforms. It illustrates the extent RMS-adjusted average measurement can vary significantly in relation to the RMS measurement for signals with non-sinusoidal waveforms. Average Value with Crest ‘Average’ RMS % Deviation Waveform Factor RMS Value Value adjustment from RMS **1** Sinusoid **0** 1.414 0.707 0.637 0.707 0% ~~ee~~ **1** Square wave **0** 1.000 1.000 1.000 1.111 +11% **1** Triangle **0** 1.732 0.577 0.500 0.555 -4% **1** Phase-controlled Sinusoid – **0** 2.000 0.500 0.318 0.354 -29% leading 50% 

While an ideal measuring instrument would be able to handle any input waveform, realizable meters have restrictions on the maximum allowable crest factor for accurate measurements. DMR35 AC meters are designed to handle signals with crest factors up to 3 with minimal additional measurement errors. 

- www.murata ps.com 

DMR35-ACA.A01.D04   Page 8 of 11 

AC Ammeter 

## [suuRata| Ps 

## - DMR35 ACA/mA Series 

(CONTINUED): ~~a~~ RMS MEASUREMENT MODE VS. AVERAGE MEASUREMENT MODE. Frequency Response, Crest Factor, and Accuracy DMR35 AC meters are designed to accurately measure signals typically seen in 50/60 Hz AC systems. For sinusoidal input waveforms, the measurement error typically varies less than ± 1 % over the range of 20 Hz to 120 Hz, as shown in the graph below. 

**==> picture [344 x 188] intentionally omitted <==**

**----- Start of picture text -----**<br>
Typical Measurement Error vs. Frequency,<br>Sinusoidal Input<br>10%<br>5%<br>0%<br>-5%<br>-10%<br>-15%<br>-20%<br>-25%<br>-30%<br>10 100 1000<br>Frequency (Hz)<br>Measurement Error  (%)<br>**----- End of picture text -----**<br>


Since more complex waveforms contain higher frequency components and varying crest factors, the expected accuracy can vary considerably as a function of both frequency and waveform. The table below shows some typical accuracies for RMS measurements of the following waveforms at specified frequencies. 

|Waveform<br>~~——————————~~<br>~~PAPE~~|Waveform<br>~~——————————~~<br>~~PAPE~~|Waveform<br>~~——————————~~<br>~~PAPE~~|Waveform<br>~~——————————~~<br>~~PAPE~~|Waveform<br>~~——————————~~<br>~~PAPE~~|Crest<br>Factor<br>~~——————————~~<br>~~PAPE~~<br>~~|~~|Typical % Error at Given Frequency1<br>~~——————————~~|Typical % Error at Given Frequency1<br>~~——————————~~|Typical % Error at Given Frequency1<br>~~——————————~~|Typical % Error at Given Frequency1<br>~~——————————~~|Typical % Error at Given Frequency1<br>~~——————————~~|
|---|---|---|---|---|---|---|---|---|---|---|
|||||||30 Hz<br>~~——————————~~<br>~~PAPE~~<br>~~||~~|60Hz<br>~~——————————~~<br>~~PAPE~~<br>~~|~~|120 Hz<br>~~——————————~~<br>~~PAPE~~|240 Hz<br>~~——————————~~<br>~~PAPE~~|400 Hz<br>~~——————————~~<br>~~PAPE~~|
|Sinusoid<br>~~PAPE~~<br>~~tT~~|**0**<br>**1**<br>~~PAPE~~<br>~~tT~~||||1.414<br>~~PAPE~~<br>~~|~~<br>~~tT~~|0.0%<br>~~PAPE~~<br>~~||~~<br>~~tT~~|0.1%<br>~~PAPE~~<br>~~|~~<br>~~tT~~|0.4%<br>~~PAPE~~<br>~~tT~~|2.2%<br>~~PAPE~~<br>~~tT~~|4.9%<br>~~PAPE~~<br>~~tT~~|
|Square wave<br>~~tT~~|**0**<br>**1**<br>~~tT~~|~~tT~~|~~tT~~|~~tT~~|1.000<br>~~|~~<br>~~tT~~|-0.4%<br>~~| |~~<br>~~tT~~|-1.0%<br>~~|~~<br>~~tT~~|-2.0%<br>~~tT~~|-3.9%<br>~~tT~~|-4.9%<br>~~tT~~|
||||~~tT~~|~~tT~~|||||||
|Triangle<br>~~PTA~~|**0**<br>**1**<br>~~PTA~~||||1.732<br>~~PTA~~<br>~~EE~~|0.1%<br>~~PTA~~<br>~~EE~~|0.1%<br>~~PTA~~<br>~~EEEE~~|0.3%<br>~~PTA~~<br>~~EE~~|1.8%<br>~~PTA~~<br>~~EE~~|4.1%<br>~~PTA~~|
|Phase-<br>controlled<br>Sinusoid –<br>leading 50%<br>~~PTA~~<br>~~iE~~|**0**<br>**1**<br>~~PTA~~<br>~~iE~~||||2.000<br>~~PTA~~<br>~~iE~~<br>~~EE~~|-0.7%<br>~~PTA~~<br>~~iE~~<br>~~EE~~|-1.5%<br>~~PTA~~<br>~~iE~~<br>~~EEEE~~|-2.6%<br>~~PTA~~<br>~~iE~~<br>~~EE~~|-6.0%<br>~~PTA~~<br>~~iE~~<br>~~EE~~|-12.4%<br>~~PTA~~<br>~~iE~~|



- www.murata ps.com 

DMR35-ACA.A01.D04   Page 9 of 11 

AC Ammeter 

## - DMR35 ACA/mA Series 

## Murata Power Solutions 

## ~~cd~~ TECHNICAL NOTES 

## 1. Calibration 

DMR35 digital panel meters are calibrated at the factory at the time of manufacture. There are no user or field-adjustable calibration features. 

## 2. Wiring 

Power supply and input wiring must be rated for the electrical and environmental conditions under which the meter will be operated. They must also comply with any regulatory or application-mandated requirements pertaining to the user’s installation. The terminal blocks can accommodate wire gauges ranging from #14 to #24 AWG. Wiring insulation should be stripped to the proper length as described in the Terminal Block specifications table and wires must be inserted into the terminal block openings such that the screw terminal does not pinch any insulation. It is important to tighten all screw terminals to their torque specification, which also may be found in the Terminal Block specifications table. Proper tightening will help ensure reliable operation. Applications subject to vibration should use stranded wire. After final assembly, inspect all terminal block connections for shorts between adjacent conductors; this step is especially important when using stranded wire. 

## 3. Protection and Fusing 

DMR35 meters’ power supply leads (PWRA, PWRB) are protected against momentary overvoltage and reverse polarity conditions. Input terminals INA and INB are protected against noise and brief transients. Protection, however, is not provided against sustained conditions exceeding the limits listed in in the Performance & Functional Specifications Table. External fusing must be supplied by the user in accordance with applicable safety and regulatory requirements for the system in which the meter is installed. 

## 4. Noisy Power Supplies 

Some power supplies contain high-frequency switching devices that may conduct and/or radiate significant noise onto the low-level signal developed across the measurement inputs. Even though the meter incorporates built-in input filtering, some portion of this noise may be amplified and subsequently measured by its sensitive input circuitry. Limiting runs of wire to less than 3 meters (10 feet) is strongly recommended.  In certain situations, the use of twisted pair or shield wiring may be required. 

## 5. Self-Diagnostics 

Upon power-on the meter performs a self-test and checks the integrity of calibration data stored in internal non-volatile memory. If the factory calibration data has been corrupted, the meter will display ‘CAL’ on power-on and approximately once a minute thereafter to indicate that the meter is relying on default calibration factors and that displayed measurements may have more than the datasheet-specified amount of error. If the meter detects other internal fault conditions, it will attempt to reset itself.  Repeated restarts, which appear in the form of a highly intermittent display, are indicative of a hardware fault that cannot be cleared through a reset operation, in which case the meter should no longer be used. 

- www.murata ps.com 

DMR35-ACA.A01.D04   Page 10 of 11 

## |muRata |Ps Murata Power Solutions 

## - DMR35 ACA/mA Series 

AC Ammeter 

STANDARD PACKAGING, NOMINAL DIMENSIONS ~~OO~~ 

Murata Power Solutions, Inc. 129 Flanders Rd. Westborough, Ma  01581, USA. ISO 9001 REGISTERED 

This product is subject to the following operating requirements and the Life and Safety Critical Application Sales - Policy: Refer to: https://www.murata ps.com/requirements/ Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upo existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications ar ~~ee~~ subject to change without notice. ©2022 Murata Power Solutions, Inc. 

- www.murata ps.com 

DMR35-ACA.A01.D04   Page 11 of 11 



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- [Supplier page](https://es.farnell.com/murata/dmr35-aca2-ac1-r/panel-meter-3-5-digit-ac-current/dp/4062025)
---

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