# Safety Relay, 24 VDC, SPST-NO, SPST-NC, PSRmini Series, DIN Rail, 3 A, Spring Cage
**URL**: https://novapart.co/products/2702523/safety-relay-24-vdc-spst-no-nc-psrmini-series-din
**SKU**: 2702523
**Manufacturer**: PHOENIX CONTACT
**Category**: Switches & Relays || Relays || Safety Relays
**Price**: €313.5600
**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 | 3A |
| Relay Terminals | Spring Cage |
| Contact Material | Silver Nickel |
| Contact Configuration | SPST-NO, SPST-NC |
| Contact Voltage Ac Nom | 250V |
| Contact Voltage Dc Nom | 125V |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3252375/)
https://www.phoenixcontact.com/gb/products/2702523
## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523
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)
Coupling relay for electrical isolation and power adaptation for SIL 3 F&G applications, low demand, load diagnostics in the Off and On state for open circuit and short circuit, 1 enabling current path, test pulse filter, pluggable Push-in terminal block, width: 17.5 mm
The figure shows a version with a screw connection
## Your advantages
Suitable for low-demand applications up to SIL 3 according to IEC 61508, IEC 61511, and EN 50156
- Earth leakage monitoring
- Configurable Off and On state diagnostics
- Active error acknowledgment via A1 at DO
- Integrated DCS test pulse filter
- 1 enabling current path, 1 signaling current path
- Time saving push-in connection, tools not required
Potentials can be easily looped through – ideal for BUS applications
- Intuitive use through colour coded actuation lever
Can be combined with the MSTB 2,5 range
Quick and convenient testing using integrated test option
Key Commercial Data
~~Ge~~ Packing unit 1 pc GTIN 4°055626°283371 ~~fe UNNNT~~ GTIN 4055626283371 ~~a G~~ Weight per Piece (excluding packing) 147.480 g ~~Ge GO~~ Custom tariff number 85364190 ~~Ce~~ Country of origin Germany
## Technical data
Note
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https://www.phoenixcontact.com/gb/products/2702523
## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523
## Technical data
|Technical data||
|---|---|
|Note||
|Utilization restriction
EMC: class A product, see manufacturer's declaration in the download
area
~~ee~~||
|Dimensions||
|Width
17.5 mm
Height
117.4 mm
Depth
114.5 mm
~~———~~||
|Ambient conditions||
|Ambient temperature (operation)|-25 °C ... 60 °C (observe derating)|
|Ambient temperature (storage/transport)|-40 °C ... 65 °C|
|Max. permissible relative humidity (operation)|75 % (on average, 85% infrequently, non-condensing)|
|Max. permissible humidity (storage/transport)|75 % (on average, 85% infrequently, non-condensing)|
|Air pressure (operation)|79 kPa ... 106 kPa|
|Air pressure (storage/transport)|79 kPa ... 106 kPa|
|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. 75 mA|
|Power consumption at US|typ. 2 W (at US/UD; On state)|
|Inrush current|max. 100 mA|
|Filter time|2 ms (at A1-A2 in the event of voltage dips at Us)|
||max. 2 ms (at A1-A2; low test pulse width)|
||≥ 100 ms (at A1-A2; low test pulse rate)|
||max. 17 ms (at A1-A2; high test pulse width)|
||≥ 800 ms (at A1-A2; high test pulse rate)|
|Diagnostic supply voltage UD|24 V DC -20 % / +25 %|
|Input current at UD|35 mA (at UD= 24 V)|
||45 mA (at UD= 19 V)|
||25 mA (at UD= 30 V)|
|Inrush current at UD|1.5 A (Δt < 10 µs)|
|Power consumption at UD|typ. 0.9 W (at UD; Off state)|
|Protective circuit|Surge protection 36 V suppressor diode (A1-A2)33 V suppressor diode
(24V-GND)|
||Polarity reversal protection for rated control circuit supply voltage and|
||diagnostic supply voltage|
|Digital inputs||
|Description of the input
Test point for proof test
Number of inputs
3
Inrush current
typ. 200 mA
~~_———~~||
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https://www.phoenixcontact.com/gb/products/2702523
## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523
## Technical data
## Digital inputs
Current consumption typ. 20 mA (Input TP1) typ. 20 mA (Input TP2) typ. 30 mA (Input TP3) Type of protection Surge protection Protective circuit/component 36 V suppressor diode 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 AgNi, gold-flashed, Ag alloy Switching voltage min. 16 V AC/DC max. 250 V AC max. 125 V DC Limiting continuous current 3 A (Observe derating, load type, and on-load voltage) Inrush current min. 50 mA max. 5 A (Δt 1 s) Sq. Total current 9 A2 (observe derating) Switching capacity min. 1 W Switching frequency max. 0.5 Hz Diagnostic threshold 7 Ω ... 20 kΩ (configurable) Mechanical service life approx. 5x 107 cycles Relay outputs: return current/signaling current path Output name Signaling current path Output description non-safety-related N/C contact Number of outputs 1 (without delay, floating) Contact type 1 signaling current path Inrush current max. 800 mA (Δt 100 ms) Short-circuit protection no ~~a~~ Times Typical pickup time at US typ. 100 ms (when controlled via A1-A2) Typical release time at US typ. 30 ms (when controlled via A1-A2) Recovery time 1 s (when controlled via A1-A2) ~~——=~~ General Relay type Electromechanical relay Nominal operating mode 100% operating factor Net weight 147.48 g Mounting position vertical or horizontal ~~[=]~~ Mounting type DIN rail mounting ~~SSS~~ 12/30/2019 Page 3 / 6
https://www.phoenixcontact.com/gb/products/2702523
## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523
Technical data General Assembly instructions See derating curve Degree of protection IP20 Min. degree of protection of inst. location IP54 Housing material Frianyl A 63 R V0 Housing color yellow Status display 1 x yellow LED, 1 x green LED, 1 x red LED ~~SSS~~ Connection capacity Connection method Push-in spring connection pluggable Yes Conductor cross section solid 0.2 mm² ... 1.5 mm² Conductor cross section flexible 0.2 mm² ... 1.5 mm² Conductor cross section AWG / kcmil 24 ... 16 Conductor cross section flexible, with ferrule without plastic sleeve 0.25 mm² ... 1.5 mm² (only together with CRIMPFOX 6) Conductor cross section, flexible, with ferrule, with plastic sleeve 0.25 mm² ... 1.5 mm² (only together with CRIMPFOX 6) Stripping length 8 mm Safety-related characteristic data Designation IEC 61508 - Low demand ~~= >=—~~ Safety Integrity Level (SIL) 3 Designation EN 50156-2 Safety Integrity Level (SIL) 3 (Reference IEC 61508) ~~=—SSS>>=~~ Standards and Regulations Designation Air clearances and creepage distances between the power circuits Standards/regulations DIN EN 50178 Rated insulation voltage 250 V AC Rated surge voltage/insulation Basic insulation 4 kV between all current paths and housing Safe isolation, 6 kV reinforced insulation from (A1/A2, 24V/0V, 21/22, and TP1/TP2/TP3) to the enabling current path (L, L', LO, LO', NI, NI', N,N') Degree of pollution 2 Overvoltage category III Shock 15g, 11 ms Vibration (operation) 10 Hz ... 150 Hz, 2g Conformance CE-compliant Environmental simulation test ISA-S71.04 (G3) 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” ~~==~~ 12/30/2019 Page 4 / 6
https://www.phoenixcontact.com/gb/products/2702523
## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523
## Drawings
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Block diagram
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## Classifications
## eCl@ss
|eCl@ss 5.1|eCl@ss 5.1|27371901|
|---|---|---|
|eCl@ss 6.0|eCl@ss 6.0|27371800|
|eCl@ss 7.0|eCl@ss 7.0|27371819|
|eCl@ss 8.0|eCl@ss 8.0|27371819|
|eCl@ss 9.0|eCl@ss 9.0|27371819|
## ETIM
|ETIM 5.0|ETIM 5.0|EC001449|
|---|---|---|
|ETIM 6.0|ETIM 6.0|EC001449|
|ETIM 7.0|ETIM 7.0|EC001449|
## Approvals
## Approvals
## Approvals
UL Listed / cUL Listed / cULus Listed
Ex Approvals
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https://www.phoenixcontact.com/gb/products/2702523
## Coupling relay - PSR-PC51-1NO-1NC-24DC-SP - 2702523
## Approvals
Approval details
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**----- Start of picture text -----**
UL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324
oe
cUL Listed http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 140324
cULus Listed
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Phoenix Contact 2019 © - all rights reserved http://www.phoenixcontact.com
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## Links
- [View this product on Novapart](https://novapart.co/products/2702523/safety-relay-24-vdc-spst-no-nc-psrmini-series-din)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/phoenix-contact/psr-pc51-1no-1nc-24dc-sp/coupling-relay-spst-no-spst-nc/dp/3252375)
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