# Safety Relay, 24 VDC, SPST-NO, PSRmini Series, DIN Rail, 6 A, Screw

![Product image](https://novapart.co/image/farnell:3256067/)

**URL**: https://novapart.co/products/2904955/safety-relay-24-vdc-spst-no-psrmini-series-din
**SKU**: 2904955
**Manufacturer**: PHOENIX CONTACT
**Category**: Switches & Relays || Relays || Safety Relays
**Price**: €135.7900
**Stock**: 10+
**Lead Time**: 36 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | Lead (04-Feb-2026) |
| Ip Rating | IP20, IP54 |
| Coil Voltage | 24VDC |
| Product Range | PSRmini Series |
| Relay Mounting | DIN Rail |
| Contact Current | 6A |
| Relay Terminals | Screw |
| Contact Material | Silver Tin Oxide |
| Contact Configuration | SPST-NO |
| Contact Voltage Ac Nom | 250V |
| Contact Voltage Dc Nom | 250V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3256067/)

https://www.phoenixcontact.com/pi/products/2904955 

## Safety relays - PSR-MS45-1NO-1DO-24DC-SC - 2904955 

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's documentation. Our General Terms of Use for Downloads are valid 

(http://phoenixcontact.com/download) 

Safety relay for emergency stop and safety doors up to SILCL 3, Cat. 4, PL e, 1 or 2-channel operation, manual, monitored start, 1 enabling current path, US = 24 V DC, fixed screw terminal block 

## Your advantages 

Up to Cat.4/PL e according to ISO 13849-1, SILCL 3 according to IEC 62061 

Low housing width of just 6.8 mm 

- Two-channel control 

- 1 enabling current path, 1 digital signal output 

Manual and monitored activation 

## Key Commercial Data 

Packing unit 1 pc ~~ee~~ GTIN 4046356"904056 ~~PT [~~ GTIN ~~Pe~~ 4046356904056 

## Technical data 

## Note 

Utilization restriction 

EMC: class A product, see manufacturer's declaration in the download area 

## Dimensions 

**==> picture [454 x 102] intentionally omitted <==**

**----- Start of picture text -----**<br>
|||
|---|---|
|Width|6.8 mm|
|Height|93.1 mm|
|Depth|102.5 mm|
|Ambient conditions|
|Ambient temperature (operation)|-40 °C ... 60 °C (observe derating)|
|Ambient temperature (storage/transport)|-40 °C ... 85 °C|
|Max. permissible relative humidity (operation)|75 % (on average, 85% infrequently, non-condensing)|

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


## Ambient conditions 

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https://www.phoenixcontact.com/pi/products/2904955 

## Safety relays - PSR-MS45-1NO-1DO-24DC-SC - 2904955 

## Technical data 

## Ambient conditions 

Max. permissible humidity (storage/transport) 75 % (on average, 85% infrequently, non-condensing) Maximum altitude ≤ 2000 m (Above sea level) Power supply Rated control circuit supply voltage US 24 V DC -15 % / +10 % 20.4 V DC ... 26.4 V DC Rated control supply current IS typ. 42 mA Power consumption at US typ. 1 W Inrush current 4.5 A (Δt < 120 µs at Us) Filter time 1 ms (at A1 in the event of voltage dips at Us) Protective circuit Surge protection Suppressor diode Protection against polarity reversal for rated control circuit supply voltage ~~===~~ Digital inputs Input voltage range "0" signal 0 V DC ... 5 V DC (for safe Off; at S12) Input current range "0" signal 0 mA ... 2 mA (for safe Off; at S12) Inrush current < 20 mA (with Us/Ix to S12) < 10 mA (with Us/Ix at the start circuit) < 5 mA (with Us/Ix to S22/Us) > -15 mA (with Us/Ix to S22/0V) Current consumption < 5 mA (with Us/Ix to S12) < 5 mA (with Us/Ix to S22/Us) < 10 mA (with Us/Ix at the start circuit) > -5 mA (with Us/Ix to S22/0V) Filter time max. 1.5 ms (at S12, S22; test pulse width) min. 7.5 ms (at S12, S22; test pulse rate) Test pulse rate = 5 x Test pulse width Voltage at input/start and feedback circuit 24 V DC -15 % / +10 % Max. permissible overall conductor resistance 150 Ω ~~=~~ Relay outputs: enabling current path Output name Enabling current path Output description safety-related N/O contacts Number of outputs 1 (undelayed) Contact type 1 enabling current path Contact material AgSnO2 Switching voltage min. 12 V AC/DC max. 250 V AC/DC (Observe the load curve) Limiting continuous current 6 A (observe derating) Inrush current min. 3 mA max. 6 A ~~-_~~ 05/16/2019   Page 2 / 6 

https://www.phoenixcontact.com/pi/products/2904955 

## Safety relays - PSR-MS45-1NO-1DO-24DC-SC - 2904955 

|Technical data||
|---|---|
|Relay outputs: enabling current path||
|Sq. Total current<br>36 A<br>2(observe derating)<br>Switching capacity<br>min. 60 mW<br>Switching frequency<br>max. 0.5 Hz<br>Mechanical service life<br>10x 10<br>6cycles<br>Output fuse<br>6 A gL/gG (N/O contact)<br>4 A gL/gG (for low-demand applications)<br>~~——~~||
|Alarm outputs||
|Output description<br>non-safety-related<br>Number of outputs<br>1 (digital, PNP)<br>Voltage<br>22 V DC (Us- 2 V)<br>Current<br>max. 100 mA<br>Maximum inrush current<br>500 mA (Δt = 1 ms at Us)<br>Short-circuit protection<br>no<br>Times<br>Typical response time at US<br>< 175 ms<br>Typical release time at US<br>< 20 ms (when controlled via A1 or S12 and S22.)<br>Recovery time<br>< 500 ms<br>~~i~~||
|General||
|Relay type|Electromechanical relay with forcibly guided contacts in accordance with<br>IEC/EN 61810-3 (EN 50205)|
|Nominal operating mode|100% operating factor|
|Net weight|69 g|
|Mounting position|vertical or horizontal|
|Mounting type|DIN rail mounting|
|Degree of protection|IP20|
|Min. degree of protection of inst. location|IP54|
|Housing material|PBT|
|Housing color|yellow|
|Operating voltage display|1 x green LED|
|Status display|2 x green LEDs|
|Connection data||
|Connection method<br>Screw connection<br>pluggable<br>no<br>Conductor cross section solid min.<br>0.2 mm²<br>Conductor cross section solid max.<br>2.5 mm²<br>Conductor cross section flexible min.<br>0.2 mm²<br>Conductor cross section flexible max.<br>2.5 mm²<br>Conductor cross section AWG min.<br>26<br>Conductor cross section AWG max.<br>12<br>~~===~~||
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https://www.phoenixcontact.com/pi/products/2904955 

## Safety relays - PSR-MS45-1NO-1DO-24DC-SC - 2904955 

## Technical data 

## Connection data 

Stripping length 12 mm Screw thread M3 Safety-related characteristic data Stop category 0 Designation IEC 61508 - High demand Safety Integrity Level (SIL) 3 Designation IEC 61508 - Low demand Safety Integrity Level (SIL) 3 Designation EN ISO 13849 Performance level (PL) e (4 A DC13; 5 A AC15; 8760 switching cycles/year) Category 4 Designation EN 62061 Safety Integrity Level Claim Limit (SIL CL) 3 Standards and Regulations Designation Air clearances and creepage distances between the power circuits Standards/regulations DIN EN 50178 Rated insulation voltage 250 V AC 250 V AC Safe isolation, reinforced insulation 6 kV between input circuit and Rated surge voltage/insulation enabling current path Basic insulation 4 kV between all current paths and housing Degree of pollution 2 Overvoltage category III Shock 15g Vibration (operation) 10 Hz ... 150 Hz, 2g Conformance CE-compliant Environmental Product Compliance REACh SVHC Lead 7439-92-1 China RoHS Environmentally Friendly Use Period = 50 For details about hazardous substances go to tab “Downloads”, Category “Manufacturer's declaration” ~~S=[=]~~ Drawings 05/16/2019   Page 4 / 6 

https://www.phoenixcontact.com/pi/products/2904955 

## Safety relays - PSR-MS45-1NO-1DO-24DC-SC - 2904955 

**==> picture [409 x 174] intentionally omitted <==**

**----- Start of picture text -----**<br>
Block diagram Block diagram<br>A1 S12 S22 S34 13 A1 PSR-MS45 S22 S34 13<br>PSR-MS45 IN K1 1<br>PWR K1/K2 2 3<br>K2<br>24V DC<br>K1<br>9 K2<br>A2 M1 14 K1 K2<br>a 8 4 PRE 5 6 7<br>8<br>A2 S12 M1 14<br>Key:<br>1 = Input circuit<br>**----- End of picture text -----**<br>


2 = Voltage limitation 

3 = Start circuit 

- 4 = Control circuit channel 1 

- 5 = Control circuit signal output 

- 6 = Control circuit channel 2 

- 7 = Start channel 1 and 2 

8 = Channel 1 

9 = Diagnostics K1, K2 = Force-guided elementary relays 

## Circuit diagram 

**==> picture [156 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
24V DC L<br>S2<br>K1<br>S1<br>K2<br>A1 S34(  ) S12(  ) S22(  ) 13 K1<br>PSR-MS45<br>A2 M1(  ) 14 K2<br>M<br>K1<br>K2<br>0V N<br>**----- End of picture text -----**<br>


## Approvals 

## Approvals 

## Approvals 

UL Listed / cUL Listed / Functional Safety / UL Listed / cUL Listed / Functional Safety / EAC / EAC 

Ex Approvals 

## Approval details 

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https://www.phoenixcontact.com/pi/products/2904955 

## Safety relays - PSR-MS45-1NO-1DO-24DC-SC - 2904955 

Approvals 

UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324  ~~oo~~ cUL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324  Functional Safety 44-205-13755202  ~~ee~~ UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324  ~~oo~~ cUL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324  Functional Safety 44-205-13755202  ~~ee~~ RU C- EAC DE.A*30.B.01082  ~~oo~~ RU C- EAC DE.A*30.B.01082  

Phoenix Contact 2019 © - all rights reserved http://www.phoenixcontact.com 

PHOENIX CONTACT GmbH & Co. KG Flachsmarktstr. 8 32825 Blomberg Germany Tel. +49 5235 300 Fax +49 5235 3 41200 http://www.phoenixcontact.com 

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- [Supplier page](https://es.farnell.com/phoenix-contact/psr-ms45-1no-1do-24dc-sc/safety-rly-spst-no-24vdc-6a-din/dp/3256067)
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