# Safety Relay, 24 VDC, 4PST-2NO / 2NC, PSRmini Series, DIN Rail, 4 A, Push In

![Product image](https://novapart.co/image/farnell:4913655/)

**URL**: https://novapart.co/products/1086946/safety-relay-24-vdc-4pst-2no-2nc-psrmini-series
**SKU**: 1086946
**Manufacturer**: PHOENIX CONTACT
**Category**: Switches & Relays || Relays || Safety Relays
**Price**: €151.8100
**Stock**: 10+
**Lead Time**: 36 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Ip Rating | IP20, IP54 |
| Coil Voltage | 24VDC |
| Product Range | PSRmini Series |
| Relay Mounting | DIN Rail |
| Contact Current | 4A |
| Relay Terminals | Push In |
| Contact Material | Silver Tin Oxide |
| Contact Configuration | 4PST-2NO / 2NC |
| Contact Voltage Ac Nom | 250V |
| Contact Voltage Dc Nom | 250V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4913655/)

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

1086946 

https://www.phoenixcontact.com/in/products/1086946 

Please be informed that the data shown in this PDF document is generated from our online catalog. Please find the complete data in the user documentation. Our general terms of use for downloads are valid. 

Coupling relay for SIL 3 high and low-demand applications, coupled digital output signals to the I/O, 2 independently controllable enabling current paths, 2 confirmation current paths, safe state off applications, test pulse filter, pluggable Push-in terminal block 

## Product description 

The safe coupling relay couples digital output signals from failsafe controllers to I/O devices and is used for power adaptation and electrical isolation. The safe coupling relay can be used in high- and low-demand applications. The safe coupling relay safely interrupts circuits. 

## Your advantages 

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- Up to SIL 3 in accordance with IEC 61508, IEC 61511, and IEC 50156 

- Approved for Class I, Zone 2 applications 

- Force-guided contacts in accordance with EN 50205 

- Easy proof test according to IEC 61508 thanks to integrated signal contact 

- Low housing width of just 12.5 mm 

- Long service life thanks to filtering of controller test pulses 

- 2 enabling current paths, 2 confirmation current paths 

- Independent control of the relay channels possible 

## Commercial data 

|Item number|1086946|
|---|---|
|Packing unit|1 pc|
|Minimum order quantity|1 pc|
|Sales key|DNA|
|Product key|DNA182|
|GTIN|4055626881669|
|Weight per piece (including packing)|140.52 g|
|Weight per piece (excluding packing)|115.41 g|
|Customs tariff number|85364190|
|Country of origin|DE|



## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

1086946 

https://www.phoenixcontact.com/in/products/1086946 

## Technical data 

## Notes 

## Note on application 

Note on application 

Only for industrial use 

## Product properties 

|roduct properties||
|---|---|
|Product family|PSRmini|
|Application|Safe switch off|
||High demand|
||Low demand|
||Ex|
|Control|1 and 2 channel|
|Mechanical service life|10x 106cycles|
|Relay type|Electromechanical relay with force-guided contacts in<br>accordance with IEC/EN 61810-3|
|Insulation characteristics||
|Overvoltage category|III|
|Degree of pollution|2|



## Times 

|Typ. starting time with Us|< 70 ms (when controlled via A1 or A3 at US)|
|---|---|
|Typical release time|< 30 ms (when controlled via A1 or A3 at US)|
|Recovery time|500 ms|



## Electrical properties 

Maximum power dissipation for nominal condition 7.05 W (S1, S2, S3, S4 = ON, 2-channel load, UB = 30 V, US = 24 V, IS = 2*46 mA, IL² = 36 A, Rcontact = 0.05 Ω) Nominal operating mode 100% operating factor Rated insulation voltage 250 V AC Rated surge voltage/insulation Safe isolation, reinforced insulation 6.4 kV from (A1/A2, A3/A4, 21/22, 41/42) to (13/14, 33/34) and between (13/14) and (33/34) Basic insulation 4 kV between all current paths and housing 500 V isolation between (A1/A2, A3/A4) and (21/22, 41/42) 

## Supply 

A1/A2, A3/A4 

Designation A1/A2, A3/A4 Rated control circuit supply voltage US 19.2 V DC ... 30 V DC Rated control circuit supply voltage US 24 V DC -20 % / +25 % Rated control supply current IS typ. 15 mA (per channel (configurable)) typ. 25 mA (per channel (configurable)) typ. 40 mA (per channel (configurable)) typ. 46 mA (per channel (configurable)) typ. 360 mW (per channel (configurable)) 

Mar 20, 2026, 5:54�AM     Page 2 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

## 1086946 

https://www.phoenixcontact.com/in/products/1086946 

|Power consumption at US|typ. 600 mW (per channel (configurable))|
|---|---|
||typ. 960 mW (per channel (configurable))|
||typ. 1.1 W (per channel (configurable))|
|Inrush current|typ. 200 mA (Δt = 10 µs at Us, per channel (configurable))|
||typ. 300 mA (Δt = 10 µs at Us, per channel (configurable))|
|Filter time|2 ms (in the event of voltage dips at Us)|
|Protective circuit|Serial protection against polarity reversal; 38.6 V suppressor<br>diode|



## Output data 

Relay: Enabling current paths (13/14, 33/34) 

|Output description|2 N/O contacts parallel, without delay, safety-related, floating|
|---|---|
|Number of outputs|2|
|Contact switching type|2 enabling current paths|
|Contact material|AgSnO2|
|Switching voltage|min. 12 V DC|
||max. 250 V AC/DC|
|Switching power|min. 60 mW|
|Inrush current|min. 3 mA|
||max. 6 A|
|Switching capacity|4 A (24 V (DC13))|
||4 A (250 V (AC15), low demand)|
||2 A (250 V (AC15), high demand)|
|Limiting continuous current|6 A (High demand)|
||4 A (Low demand)|
|Sq. Total current|72 A2(High-demand, observe derating)|
||32 A2(Low-demand, observe derating)|
|Switching frequency|max. 0.1 Hz|
|Mechanical service life|10x 106cycles|
|Output fuse|6 A gL/gG|
||4 A gL/gG (for low-demand applications)|
|Relay: Confirmation current paths (21/22, 41/42)||
|Output description|2 N/C contacts parallel, without delay, safety-related, floating|
|Number of outputs|2|
|Contact switching type|2 confirmation current paths|
|Contact material|AgCuNi, + Au|
|Switching voltage|min. 5 V DC|
||max. 30 V DC|
|Switching power|min. 20 mW|
|Inrush current|min. 1 mA|
||max. 100 mA|
|Limiting continuous current|100 mA|
|Mechanical service life|10x 106cycles|



Mar 20, 2026, 5:54�AM     Page 3 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

## 1086946 

https://www.phoenixcontact.com/in/products/1086946 

Output fuse 150 mA Fast-blow 

## Connection data 

|onnection data||
|---|---|
|Conductor connection||
|Connection method|Push-in connection|
|Conductor cross-section rigid|0.2 mm² ... 1.5 mm²|
|Conductor cross-section flexible|0.2 mm² ... 1.5 mm²|
|Conductor cross-section, flexible, with ferrule, with plastic sleeve|0.25 mm² ... 1.5 mm² (only together with CRIMPFOX 6)|
|Conductor cross-section, flexible, with ferrule, without plastic|0.25 mm² ... 1.5 mm² (only together with CRIMPFOX 6)|
|sleeve||
|Conductor cross-section AWG|24 ... 16|
|Stripping length|8 mm|



## Signaling 

||Status display|2 x LED (green)|
|---|---|---|
||mensions||
||Width|12.5 mm|
||Height|116.6 mm|
||Depth|114.5 mm|



## Dimensions 

## Material specifications 

|aterial specifications||
|---|---|
|Color (Housing)|yellow (RAL 1018)|
|Housing material|PA|



## Characteristics 

|haracteristics||
|---|---|
|Safety data||
|Stop category|0|
|Safety data: EN ISO 13849||
|Performance level (PL)|e|
|Safety data: EN 50156-2||
|Safety Integrity Level (SIL)|3 (Reference IEC 61508)|
|Safety data: IEC 61508 – High-demand for 2-channel wiring (1oo2 structure)||
|Safety Integrity Level (SIL)|3|
|Safety data: IEC 61508 – High-demand for 1-channel wiring (1oo1 structure)||
|Safety Integrity Level (SIL)|2|
|Safety data: IEC 61508 – Low-demand for 2-channel|wiring (1oo2 structure)|
|Safety Integrity Level (SIL)|3|
|Safety data: IEC 61508 – Low-demand for 1-channel|wiring (1oo1 structure)|
|Safety Integrity Level (SIL)|2|



Mar 20, 2026, 5:54�AM     Page 4 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

1086946 

https://www.phoenixcontact.com/in/products/1086946 

Safety data: EN IEC 62061 Safety Integrity Level (SIL) 3 

## Environmental and real-life conditions 

|nvironmental and real-life conditions||
|---|---|
|Ambient conditions||
|Degree of protection|IP20|
|Min. degree of protection of inst. location|IP54|
|Ambient temperature (operation)|-40 °C ... 70 °C (observe derating)|
|Ambient temperature (storage/transport)|-40 °C ... 85 °C|
|Maximum altitude|≤ 2000 m (Above sea level)|
|Max. permissible humidity (storage/transport)|75 % (on average, 85% infrequently, non-condensing)|
|Max. permissible relative humidity (operation)|75 % (on average, 85% infrequently, non-condensing)|
|Shock|15g|
|Vibration (operation)|10 Hz ... 150 Hz, 2g|



## Approvals 

|pprovals||
|---|---|
|ATEX||
|Identification|II 3G  Ex ec nC IIC T4 Gc|
|Certificate|DEMKO 19 ATEX 2240X|
|IECEx||
|Identification|Ex ec nC IIC T4 Gc|
|Certificate|IECEx ULD 19.0023X|
|UL, USA/Canada||
|Identification|cULus|
|Certificate|E140324|
|UL Ex, USA / Canada||
|Identification|Class I, Zone 2, AEx ec nC IIC T4 / Ex ec nC IIC Gc T4 X|
||Class I, Div. 2, Groups A, B, C, D, T4|
|Certificate|E360692|
|CE||
|Identification|CE-compliant|
|Environmental simulation test||
|Identification|G3|
|Certificate|ISA-S71.04|
|CCC / China-Ex||
|Identification|Ex ec nC IIC T4 Gc|
|Certificate|2022122304115696|



## Mounting 

Mounting type DIN rail mounting 

Mar 20, 2026, 5:54�AM     Page 5 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

## 1086946 

https://www.phoenixcontact.com/in/products/1086946 

|Assembly note|See derating curve|
|---|---|
|Mounting position|vertical or horizontal|



Mar 20, 2026, 5:54�AM     Page 6 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

1086946 

https://www.phoenixcontact.com/in/products/1086946 

## Drawings 

**==> picture [409 x 367] intentionally omitted <==**

**----- Start of picture text -----**<br>
Circuit diagram<br>24V DC<br>SIS/ FS-PLC<br>24V<br>0V DO DO DI<br>0V GND<br>K1<br>24V DC<br>K2<br>L<br>A1 A3 13 21 33 41<br>K1<br>PSR-PC21<br>K2<br>A2 A4 14 22 34 42<br>M<br>K1<br>K2<br>N<br>**----- End of picture text -----**<br>


High-demand application with failsafe controller 

Mar 20, 2026, 5:54�AM     Page 7 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

1086946 

https://www.phoenixcontact.com/in/products/1086946 

**==> picture [409 x 367] intentionally omitted <==**

**----- Start of picture text -----**<br>
Circuit diagram<br>24V DC<br>SIS/ FS-PLC<br>24V<br>0V DO DO DI<br>0V GND<br>L<br>A1 A3 13 21 33 41<br>K1<br>PSR-PC21<br>K2<br>A2 A4 14 22 34 42<br>M<br>K1<br>K2<br>N<br>**----- End of picture text -----**<br>


High-demand application with failsafe controller 

Block diagram 

**==> picture [377 x 194] intentionally omitted <==**

**----- Start of picture text -----**<br>
A1 A2 14 22 34 42<br>S1<br>S2<br>K1 K1<br>24V DC PSR-PC21<br>S3<br>S4<br>K2 K2<br>24V DC<br>A3 A4 13 21 33 41<br>**----- End of picture text -----**<br>


Block diagram 

Mar 20, 2026, 5:54�AM     Page 8 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

1086946 

https://www.phoenixcontact.com/in/products/1086946 

## Approvals 

To download certificates, visit the product detail page: https://www.phoenixcontact.com/in/products/1086946 

 cULus Listed Approval ID: E140324 

 Functional Safety Approval ID: 968/FSP 1955.02/24 

 IECEx Approval ID: IECEx ULD 19.0023X  ATEX Approval ID: DEMKO 19 ATEX 2240X 

 cULus Listed Approval ID: E360692 

 CCC Approval ID: 2022122304115696 

Mar 20, 2026, 5:54�AM     Page 9 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

1086946 

https://www.phoenixcontact.com/in/products/1086946 

## Classifications 

|ECLASS|ECLASS||
|---|---|---|
||ECLASS-13.0|27371819|
||ECLASS-15.0|27371819|
|ETIM|||
||ETIM 10.0|EC001449|
|UNSPSC|||
||UNSPSC 21.0|39122200|



Mar 20, 2026, 5:54�AM     Page 10 (11) 

## PSR-PC21-2NO-2NC-24DC-SP - Coupling relay 

1086946 

https://www.phoenixcontact.com/in/products/1086946 

## Environmental product compliance 

EU RoHS Fulfills EU RoHS substance requirements Yes Exemption 7(a), 7(c)-I China RoHS Environment friendly use period (EFUP) EFUP-50 

An article-related China RoHS declaration table can be found in the download area for the respective article under "Manufacturer declaration". For all articles with EFUP-E, no China RoHS declaration table issued and required. 

EU REACH SVHC REACH candidate substance (CAS No.) Lead(CAS: 7439-92-1) SCIP 60c80de9-918f-4455-8c74-685314cc2785 

Phoenix Contact 2026 © - all rights reserved https://www.phoenixcontact.com 

PHOENIX CONTACT (I) Pvt. Ltd. A-58/2, Okhla Industrial Area, Phase - II, New Delhi-110 020 

+91.1275.71420 info@phoenixcontact.co.in 

Mar 20, 2026, 5:54�AM     Page 11 (11) 



## Links

- [View this product on Novapart](https://novapart.co/products/1086946/safety-relay-24-vdc-4pst-2no-2nc-psrmini-series)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/phoenix-contact/1086946/coupling-relay-4pst-2no-2nc-24vdc/dp/4913655)
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