# Analogue Timer, Off-Delay, 0.05 s, 10 min, 7 Ranges, 2 Changeover Relays
**URL**: https://novapart.co/products/CT-ARS.21P/analogue-timer-off-delay-005-s-10-min-7-ranges-2
**SKU**: CT-ARS.21P
**Manufacturer**: ABB
**Category**: Automation & Process Control || Panel Displays & Instrumentation || Panel Instrumentation || Analogue Timers - DIN Rail
**Price**: €100.5300
**Stock**: 10+
## Description
Product Range:-; Timer Functions:Off-Delay; Time Min:0.05s; Time Max:10min; No. of Timing Ranges:7Ranges; Timer Output:2 Changeover Relays; Supply Voltage Max:240V; Current Rating Nom:5
## Specifications
| Parameter | Value |
|---|---|
| Time Max | 10min |
| Time Min | 0.05s |
| Timer Output | 2 Changeover Relays |
| Product Range | - |
| Timer Functions | Off-Delay |
| Current Rating Nom | 5A |
| Supply Voltage Max | 240V |
| No. Of Timing Ranges | 7Ranges |
| Connection / Termination | Screw Terminals |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:1896028/)
**Data sheet**
## Electronic timer CT-ARS.21
## OFF-delayed without auxiliary voltage with 2 c/o (SPDT) contacts
The CT-ARS.21 is an electronic timer from the
CT-S range with true OFF-delay. It provides 7 time ranges and a continuous rated control voltage that enables worldwide use regardless of the supply voltage.
All electronic timers from the CT-S range are available with two different terminal versions. You can choose between the proven screw connection technology (double-chamber cage connection terminals) and the completely tool-free Easy Connect Technology (push-in terminals).
## Characteristics
- Rated control supply voltage 24-240 V AC/DC
- OFF-delay timer without auxiliary voltage
- 7 time ranges (0.05 s - 10 min)
- Precise adjustment by front-face operating elements
- Screw connection technology or Easy Connect Technology available
## Approvals
A UL 508, CAN/CSA C22.2 No.14 C GL pending D GOST K CB scheme E CCC
- Enclosure material for highest fi re protection classifi cation
- Tool-free mounting and demounting on DIN-rail
- 2 c/o (SPDT) contacts
- 22.5 mm (0.89 in) width
- 1 LED for status indication
## Marks
a CE b C-Tick
## Order data
## Electronic timer
|Type|Rated control supply voltage|Connection technology|Time ranges|Order code|
|---|---|---|---|---|
|CT-ARS.21P|24-240 V AC/DC|Push-in terminals|0.05 s - 10 min|1SVR 740 120 R3300|
|CT-ARS.21S|24-240 V AC/DC|Screw type terminals|0.05 s - 10 min|1SVR 730 120 R3300|
|Accessories|||||
|Type|Description|||Order code|
|ADP.01|Adapter for screw mounting on panel|Adapter for screw mounting on panel||1SVR 430 029 R0100|
|MAR.01|Marker label for devices without DIP switches|||1SVR 366 017 R0100|
|COV.11|Sealable transparent cover|||1SVR 600 805 P0000|
## Accessories
## Connection technology
Maintenance free Easy Connect Technology with push-in terminals
Type designation CT-xxS.yyP
Approved screw connection technology with double-chamber cage connection terminals Type designation CT-xxS.yyS
## Push-in terminals
- Tool-free connection of rigid and fl exible wires with wire end ferrule Wire size: 2 x 0.5-1.5 mm²
- Easy connection of fl exible wires without wire end ferrule by opening the terminals
Double-chamber cage connection terminals
- Terminal spaces for different wire sizes: fi ne-strand with/without wire end ferrule: 1 x 0.5-2.5 mm², 2 x 0.5-1.5 mm² rigid: 1 x 0.5-4 mm², 2 x 0.5-2.5 mm²
- Pozidrive screws for pan- or crosshead screwdrivers
- Opening for testing the electrical contacting
- Gas-tight
Both the Easy Connect Technology with push-in terminals and screw connection technology with double-chamber cage connection terminals have the same connection geometry as well as terminal position.
2 - Electronic timer CT-ARS.21 | Data sheet
Functions
Operating control
|_| 1 Rotary switch for the preselection of the time range
**==> picture [470 x 182] intentionally omitted <==**
**----- Start of picture text -----**
.| 2 Fine adjustment of the time delay
| 3 Indication of operational states
U: green LED - control supply voltage
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**----- End of picture text -----**
**==> picture [236 x 26] intentionally omitted <==**
**----- Start of picture text -----**
| 3 Indication of operational states
U: green LED - control supply voltage
**----- End of picture text -----**
## Application
The CT-S range timers are designed for use in industrial applications. They operate over an universal range of supply voltages and a large time delay range, within compact dimensions. The easy-to-set front-face potentiometers, with direct reading scales, provide accurate time delay adjustment.
## Operating mode
The CT-ARS.21 with 2 c/o contacts offers 7 time ranges, from 0.05 s to 10 min, for the adjustment of the time delay. The time delay range is rotary switch selectable. The fine adjustment of the time delay is made via an internal potentiometer, with a direct reading scale, on the front of the unit.
Data sheet | Electronic timer CT-ARS.21 - 3
Function diagram
## OFF-delay without auxiliary voltage
The OFF-delay function without auxiliary voltage does not require continuous control supply voltage for timing. Prior to first commissioning and after a six-month stop in operation, a formatting time of 5 minutes is necessary.
Applying control supply voltage energizes the output relay immediately. Applied control supply voltage is displayed by the glowing green LED. If control supply voltage is interrupted, the OFF-delay starts and the LED turns off. When timing is complete, the output relay de-energizes.
For correct operation of the unit, it is necessary to complete the minimum energizing time.
**==> picture [384 x 109] intentionally omitted <==**
**----- Start of picture text -----**
A1-A2
15-18, 25-28
15-16, 25-26
green LED
t
t = adjusted time delay
2CDC 252 021 F0206
**----- End of picture text -----**
## Electrical connection
**==> picture [403 x 123] intentionally omitted <==**
**----- Start of picture text -----**
A1 15 25 15-16/18 1 c/o (SPDT) contact
25-26/28 2. c/o (SPDT) contact
A1 15 25 A1-A2 Rated control supply voltage US 24-240 V AC/DC
A2 16 18 26 28
28 26
18 16 A2
2CDC 252 015 F0b06
**----- End of picture text -----**
**Connection diagram**
4 - Electronic timer CT-ARS.21 | Data sheet
## Technical data
Data at Ta = 25 °C and rated values, unless otherwise indicated
## Input circuits
|Input circuits|||
|---|---|---|
|**Supply circuit**||A1-A2|
|Rated control supply voltage US||24-240 V AC/DC|
|Rated control supply voltage UStolerance||-15...+10 %|
|Rated frequency|DC|n/a|
||AC|50/60 Hz|
|Frequency range|AC|47-63 Hz|
|Typical current / power consumption|24 V DC|1 mA / -|
||115 V AC|2.5 mA / -|
||230 V AC|3.1 mA / -|
|Formatting time (prior to 1st commissioning and after a|six-month stop in operation)|5 min|
|Minimum duty time||100 ms|
||||
|**Timing circuit**|||
|Kind of timer|Single-function timer|OFF-delay without auxiliary voltage|
|Time ranges 0.05 s - 10 min||0.05-1 s, 0.15-3 s, 0.5-10 s, 1.5-30 s, 5-100 s,
15-300 s, 0.5-10 min|
|Recovery time||< 50 ms|
|Repeat accuracy (constant parameters)||Δt <± 0.2 %|
|Accuracy within the rated control supply voltage tolerance||Δt < 0.004 %/V|
|Accuracy within the temperature range||Δt < 0.03 %/°C|
## User interface
|User interface|||
|---|---|---|
|Indication of operational states|||
|Control supply voltage|U: green LED|V: control supply voltage applied|
|Output circuits|||
|Kind of output|15-16/18|Relay, 1 c/o (SPDT) contact|
||25-26/28|Relay, 2. c/o (SPDT) contacts|
|Contact material||Cd-free|
|Rated operational voltage Ue||250 V|
|Minimum switching voltage / Minimum switching current||12 V / 10 mA|
|Maximum switching voltage / Minimum switching current||see ‘Load limit curves’ on page 8|
|Rated operational current Ie(IEC/EN 60947-5-1)|AC12 (resistive) at 230 V|4 A|
||AC15 (inductive) at 230 V|3 A|
||DC12 (resistive) at 24 V|4 A|
||DC13 (inductive) at 24 V|1.5 A|
|AC rating (UL 508)|utilization category (Control
Circuit Rating Code)|B 300|
||max. rated operational voltage|300 V AC|
||max. continuous thermal
current at B 300|5 A|
||max. making / breaking
apparent power at B 300|3600/360 VA|
|Mechanical lifetime||30 x 106switching cycles|
|Electrical lifetime|AC12, 230 V, 4 A|0.1 x 106switching cycles|
|Maximum fuse rating to achieve short-circuit
protection (IEC/EN 60947-5-1)|n/c contact|6 A fast-acting|
||n/o contact|10 A fast-acting|
Data sheet | Electronic timer CT-ARS.21 - 5
## General data
|General data|||
|---|---|---|
|MTBF||on request|
|Duty time||100 %|
|Dimensions (W x H x D)|product dimensions|22.5 x 85.6 x 103.7 mm (0.89 x 3.37 x 4.08 in)|
||packaging dimensions|97 x 109 x 30 mm (3.82 x 4.29 x 1.18 in)|
|Weight|net weight||
||gross weight||
|Mounting||DIN rail (IEC/EN 60715),
snap-on mounting without any tool|
|Mounting position||any|
|Minimum distance to other units|vertical|not necessary|
||horizontal|not necessary|
|Degree of protection|enclosure|IP50|
||terminals|IP20|
## Electrical connection
|Electrical connection||||
|---|---|---|---|
|||Screw connection
technology|Easy Connect
Technology (Push-in)|
|Wire size|fine-strand with
wire end ferrule|1 x 0.5-2.5 mm²
(1 x 20-14 AWG)
2 x 0.5-1.5 mm²
(2 x 20-16 AWG)|2 x 0.5-1.5 mm²
(2 x 20-16 AWG)|
||fine-strand without
wire end ferrule|1 x 0.5-2.5 mm²
(1 x 20-14 AWG)
2 x 0.5-1.5 mm²
(2 x 20-16 AWG)|2 x 0.5-1.5 mm²
(2 x 20-16 AWG)|
||rigid|1 x 0.5-4 mm²
(1 x 20-12 AWG)
2 x 0.5-2.5 mm²
(2 x 20-14 AWG)|2 x 0.5-1.5 mm²
(2 x 20-16 AWG)|
|Stripping length||8 mm (0.32 in)||
|Tightening torque||0.6 - 0.8 Nm
(5.31 - 7.08 lb.in)|-|
## Environmental data
|Environmental data|||
|---|---|---|
|Ambient temperature ranges|operation|-25...+60 °C|
||storage|-40...+85 °C|
|Damp heat, cyclic (IEC/EN 60068-2-30)||6 x 24 h cycle, 55 °C, 95 % RH|
|Vibration, sinusoidal (IEC/EN 60068-2-6)|functioning|40 m/s2, 10-58/60-150 Hz|
||resistance|60 m/s2, 10-58/60-150 Hz, 20 cycles|
|Vibration, seismic (IEC/EN 60068-3-3)|functioning|20 m/s²|
|Shock, half-sine (IEC/EN 60068-2-27)|functioning|100 m/s2, 11 ms, 3 shocks/direction|
||resistance|300 m/s2, 11 ms, 3 shocks/direction|
6 - Electronic timer CT-ARS.21 | Data sheet
Isolation data
|Isolation data|||
|---|---|---|
|Rated insulation voltage Ui|output circuit 1 /
output circuit 2|300 V|
||input circuit / output circuit|500 V|
|Rated impulse withstand voltage Uimpbetween all
isolated circuits (IEC/EN 60664-1, VDE 0110)||4 kV; 1.2/50 μs|
|Power-frequency withstand voltage test between all
isolated circuits (test voltage)||routine test: 2.0 kV; 50 Hz, 1 s
type test: 2.5 kV; 50 Hz, 1 min|
|Basic insulation (IEC/EN 61140)|input circuit / output circuit|500 V|
|Protective separation (IEC/EN 61140; IEC/EN 50178;
VDE 0106 part 101 and part 101/A1)|input circuit / output circuit|250 V|
|Pollution degree
(IEC/EN 60664-1, VDE 0110)||3|
|Overvoltage category
(IEC/EN 60664-1, VDE 0110)||III|
## Standards
|Standards||
|---|---|
|Product standard|IEC 61812-1, EN 61812-1 + A11,
DIN VDE 0435 part 2021|
|Low Voltage Directive|2006/95/EC|
|EMC Directive|2004/108/EC|
|RoHS Directive|2002/95/EC|
## Electromagnetic compatibility
|Electromagnetic compatibility|Electromagnetic compatibility|||
|---|---|---|---|
|Interference immunity to|||IEC/EN 61000-6-1, IEC/EN 61000-6-2|
||electrostatic discharge|IEC/EN 61000-4-2|Level 3, 6 kV / 8 kV|
||radiated, radio-frequency, electromagnetic field|IEC/EN 61000-4-3|Level 3, 10 V/m (1 GHz) / 3 V/m (2 GHz) /
1 V/m (2.7 GHz)|
||electrical fast transient / burst|IEC/EN 61000-4-4|Level 3, 2 kV / 5 kHz|
||surge|IEC/EN 61000-4-5|Level 4, 2 kV A1-A2|
||conducted disturbances, induced by radio-
frequency fields|IEC/EN 61000-4-6|Level 3, 10 V|
||harmonics and interharmonics|IEC/EN 61000-4-13|Level 3|
|Interference emission|||IEC/EN 61000-6-3, IEC/EN 61000-6-4|
||high-frequency radiated|IEC/CISPR 22, EN 55022|Class B|
||high-frequency conducted|IEC/CISPR 22, EN 55022|Class B|
Data sheet | Electronic timer CT-ARS.21 - 7
Technical diagrams
## Load limit curves
**==> picture [203 x 400] intentionally omitted <==**
**----- Start of picture text -----**
resistive load
AC current [A]
AC load (resistive)
1.0
0.9
0.8
0.7
0.6
0.5
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
cos ϕ
Derating factor F for inductive AC load
AC voltage [V]
2CDC 252 149 F0206
Derating factor F
2CDC 252 124 F0206
**----- End of picture text -----**
**==> picture [202 x 171] intentionally omitted <==**
**----- Start of picture text -----**
resistive load
DC current [A]
DC voltage [V]
2CDC 252 150 F0206
**----- End of picture text -----**
DC load (resistive)
**==> picture [203 x 173] intentionally omitted <==**
**----- Start of picture text -----**
250 V
resistive load
Switching current [A]
Switching cycles
2CDC 252 148 F0206
**----- End of picture text -----**
Contact lifetime
8 - Electronic timer CT-ARS.21 | Data sheet
Dimensions
## in mm and _inches_
**==> picture [247 x 167] intentionally omitted <==**
**----- Start of picture text -----**
113,4 44,65”
105,9 41,69” 22,5 0,89”
103,7 40,83”
70”33,
685,
2CDC 252 009 F0011
**----- End of picture text -----**
Accessories
in mm and _inches_
**==> picture [477 x 174] intentionally omitted <==**
**----- Start of picture text -----**
8 3,15”
22,5 0,89” 4,8 1,89”
62.5 2.461”
60 2.362” 3A1120 110,5 front to back 43,05”
70 2.756” .787”
ADP.01 - Adapter for screw mounting MAR.01 - Marker label COV.11 - Sealable transparent cover
11.5 0.453” 78” 68 26,
6.5
0.256”
10 20
0.394” 0.787” 8
.315”
2CDC 252 008 F0010 2CDC 252 186 F0005 2CDC 252 010 F0011
**----- End of picture text -----**
## Further documentation
|**Document title**|**Document type**|**Document number**|
|---|---|---|
|Electronic Products and Relays|Technical catalogue|2CDC 110 004 C020x|
|CT-AHS, CT-ARS, CT-MBS, CT-MFS|Instruction manual|1SVC 630 010 M0000|
You can find the documentation on the internet at www.abb.com/lowvoltage -> Control Products -> Electronic Relays and Controls -> Time Relays
Data sheet | Electronic timer CT-ARS.21 - 9
## Contact us
## ABB STOTZ-KONTAKT GmbH
P. O. Box 10 16 80 69006 Heidelberg, Germany Phone: +49 (0) 6221 7 01-0 Fax: +49 (0) 6221 7 01-13 25 E-mail: info.desto@de.abb.com
You can find the address of your local sales organization on the ABB home page http://www.abb.com/contacts -> Low Voltage Products and Systems
## Note:
We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB AG does not accept any responsibility whatsoever for potential errors or possible lack of information in this document.
We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its contents – in whole or in parts – is forbidden without prior written consent of ABB AG.
Copyright© 2011 ABB All rights reserved
## Links
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- [Supplier page](https://es.farnell.com/abb/ct-ars-21p/timer-off-delay-2co-push-terms/dp/1896028)
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