Image not available
Illustrative purposes only
2700578
Safety Relay, 24 VDC, SPST-NO, SPST-NC, PSRmini Series, DIN Rail, 5 A, Spring Cage
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: PHOENIX CONTACT
- Product type: Safety Relays
- SVHC: Lead (04-Feb-2026)
- IP Rating: IP20, IP54
- Coil Voltage: 24VDC
- Product Range: PSRmini Series
- Relay Mounting: DIN Rail
- Contact Current: 5A
- Relay Terminals: Spring Cage
- Contact Material: Silver Tin Oxide, Silver Copper Nickel
- Contact Configuration: SPST-NO, SPST-NC
- Contact Voltage AC Nom: 250V
- Contact Voltage DC Nom: 250V
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 159.67 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
https://www.phoenixcontact.com/gb/products/2700578 ## Coupling relay - PSR-PC20-1NO-1NC-24DC-SP - 2700578 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 SIL 3 high- and low-demand applications, couples digital output signals to the periphery, 1 enabling current path, 1 confirmation current path, 1 digital signal output, safe state off applications, test pulse filter, TBUS connection, pluggable Push-in terminal block The figure shows a version with a screw connection ## Your advantages Up to SIL 3 according to IEC 61508 - Forcibly guided contacts according to EN 50205 - Easy proof test according to IEC 61508 thanks to integrated signal contact - Approved for Class I, Zone 2 applications - Low housing width of just 12.5 mm - Enabling current path protected via internal fuse as an option - Long service life thanks to filtering of controller test pulses - 1 enabling current path, 1 digital signal output, 1 diagnostic current path - Couples digital output signals from failsafe controllers to I/O devices (valves, etc.) for electrical isolation and power adaptation - 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 |Packing unit|1 pc|1 pc|||||||||| |---|---|---|---|---|---|---|---|---|---|---|---| ||||||||||||| |GTIN|||||||||||| ||||||||||||| |GTIN|4046356916400||||||||||| |Weight per Piece (excluding packing)|182.100 g||||||||||| |Custom tariff number|85364900||||||||||| |Country of origin|Germany||||||||||| 12/30/2019 Page 1 / 8 https://www.phoenixcontact.com/gb/products/2700578 ## Coupling relay - PSR-PC20-1NO-1NC-24DC-SP - 2700578 ## Technical data |Technical data|| |---|---| |Note|| |Utilization restriction<br>EMC: class A product, see manufacturer's declaration in the download<br>area<br>Dimensions<br>Width<br>12.5 mm<br>Height<br>116.6 mm<br>Depth<br>114.5 mm<br>~~S——~~|| |Ambient conditions|| |Ambient temperature (operation)|-40 °C ... 70 °C (observe derating)| |Ambient temperature (storage/transport)|-40 °C ... 85 °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)| |Maximum altitude|≤ 2000 m (Above sea level)| ## Power supply |Ambient temperature (storage/transport)<br>Max. permissible relative humidity (operation)<br>Max. permissible humidity (storage/transport)<br>Maximum altitude<br>Power supply|-40 °C ... 85 °C<br>75 % (on average, 85% infrequently, non-condensing)<br>75 % (on average, 85% infrequently, non-condensing)<br>≤ 2000 m (Above sea level)| |---|---| |Rated control circuit supply voltage US|24 V DC -15 % / +10 % (A1/A2)| ||20.4 V DC ... 26.4 V DC| |Rated control supply current IS|typ. 50 mA| |Power consumption at US|typ. 1.2 W| |Inrush current|typ. 400 mA (Δt < 10 µs at Us)| |Filter time|max. 2 ms (at A1-A2; test pulse width)| ||≥ 100 ms (at A1-A2; test pulse rate)| |Diagnostic supply voltage UD|24 V DC -15 % / +10 % (31/A2, TBUS)| |Input current at UD|6 mA (at 31-A2 for UD; depending on load + 100 mA at M1 and 32)| |Inrush current at UD|typ. 2.5 A (Δt < 20 µs at UD)| |Protective circuit|Serial protection against polarity reversal 33 V suppressor diode (A1/<br>A2)33 V suppressor diode (31/A2)| ## Relay outputs: enabling current path |Output name|Enabling current path| |---|---| |Output description|2 N/O contacts in series, without delay, floating| |Number of outputs|1 (safety-related N/O contacts: 13/14 (13F/14))| |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 (13/14 for high-demand)| ||4 A (13F/14 with high/low demand, 13/14 with low demand)| |Inrush current|min. 3 mA| ||max. 6 A (N/O contact 13/14)| ||4 A (N/O contact 13F/14)| 12/30/2019 Page 2 / 8 https://www.phoenixcontact.com/gb/products/2700578 ## Coupling relay - PSR-PC20-1NO-1NC-24DC-SP - 2700578 Technical data Relay outputs: enabling current path Sq. Total current 36 A2 (13/14, see to derating) 16 A2 (13F/14, see to derating) Switching capacity min. 60 mW Switching frequency max. 0.5 Hz Mechanical service life 10x 106 cycles Switching capacity according to IEC 60947-5-1 4 A (24 V (DC13); N/O contact 13/14) 5 A (250 V (AC15); N/O contact 13/14) 4 A (250 V (AC15); N/O contact 13F/14) Output fuse 6 A gL/gG (N/O contact 13/14) 4 A gL/gG (for low-demand applications) ~~=~~ Relay outputs: return current/signaling current path Output name Confirmation current path 2 N/C contacts in series, without delay, not floating (reference ground: Output description A2) Number of outputs 1 (safety-related N/C contacts: 31/32) Contact type 1 confirmation current path Contact material AgCuNi, + Au Switching voltage min. 20.4 V DC max. 26.4 V DC Limiting continuous current 100 mA Inrush current min. 1 mA max. 100 mA Switching capacity min. 20 mW Switching frequency max. 0.5 Hz Mechanical service life 10x 106 cycles Output fuse 150 mA Fast-blow ~~=~~ Alarm outputs Designation M1 Output description PNP Number of outputs 1 (non-safety-related) Voltage approx. 22 V DC (UD - 2 V) Current max. 100 mA Maximum inrush current 500 mA (Δt = 1 ms at Us) Short-circuit protection no Output fuse 150 mA fast blow Times Typical pickup time at US < 100 ms (with Us when controlled via A1) Typical release time at US < 35 ms (when controlled via A1) Recovery time 500 ms ~~—~~ 12/30/2019 Page 3 / 8 https://www.phoenixcontact.com/gb/products/2700578 ## Coupling relay - PSR-PC20-1NO-1NC-24DC-SP - 2700578 ## Technical data ## 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|182.1 g| |Mounting position|vertical, horizontal, with front of module upward| |Mounting type|DIN rail mounting| |Assembly instructions|See derating curve| |Degree of protection|IP20| |Min. degree of protection of inst. location|IP54| |Housing material|PBT| |Housing color|yellow| |Operating voltage display|1 x yellow LED| |Status display|1 x green LED| |Indication|1 x red LED| |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| ## Connection capacity 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 50156 Safety Integrity Level (SIL) 3 ~~==>~~ Standards and Regulations Designation Air clearances and creepage distances between the power circuits Standards/regulations DIN EN 50178, EN 60079-15 Rated insulation voltage 250 V AC Safe isolation, 6 kV reinforced insulation from control circuit, start circuit, Rated surge voltage/insulation confirmation current path, signal output to the enabling current path; 4 kV/basic insulation between all current paths and housing Degree of pollution 2 Overvoltage category III ~~—S~~ 12/30/2019 Page 4 / 8 https://www.phoenixcontact.com/gb/products/2700578 ## Coupling relay - PSR-PC20-1NO-1NC-24DC-SP - 2700578 ## Technical data ## Standards and Regulations |Standards and Regulations|| |---|---| |Shock|15g| |Vibration (operation)|10 Hz ... 150 Hz, 2g| |Conformance|CE-compliant| |UL, USA/Canada|cULus| ||Class I, Zone 2, AEx nA nC IIC T4 / Ex nA nC IIC Gc T4 X| ||Class I, Div. 2, Groups A, B, C, D, T4| |GL|C, EMC2| |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”,<br>Category “Manufacturer's declaration”| ## Drawings ## Block diagram 12/30/2019 Page 5 / 8 https://www.phoenixcontact.com/gb/products/2700578 ## Coupling relay - PSR-PC20-1NO-1NC-24DC-SP - 2700578 ## Circuit diagram ## Classifications ## eCl@ss |eCl@ss 4.0|eCl@ss 4.0|40020600| |---|---|---| |eCl@ss 4.1|eCl@ss 4.1|40020600| |eCl@ss 5.0|eCl@ss 5.0|27371900| |eCl@ss 5.1|eCl@ss 5.1|27371900| |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 12/30/2019 Page 6 / 8 https://www.phoenixcontact.com/gb/products/2700578 ## Coupling relay - PSR-PC20-1NO-1NC-24DC-SP - 2700578 ## Approvals Approvals GL / UL Listed / cUL Listed / Functional Safety / EAC / cULus Listed Ex Approvals ## Approval details GL https://approvalfinder.dnvgl.com/ 11253-14 HH 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 Functional Safety 44-780-13755202 RU C- EAC DE.A*30.B.01082 ~~oe~~ cULus Listed ~~oo~~ Accessories Accessories DIN rail connector DIN rail bus connectors - ME 6,2 TBUS-2 1,5/5-ST-3,81 GN - 2869728 DIN rail connector for DIN rail mounting. Universal for TBUS housing. Gold-plated contacts, 5-pos. 12/30/2019 Page 7 / 8 https://www.phoenixcontact.com/gb/products/2700578 ## Coupling relay - PSR-PC20-1NO-1NC-24DC-SP - 2700578 ## Accessories Phoenix Contact 2019 © - all rights reserved http://www.phoenixcontact.com 12/30/2019 Page 8 / 8
Updated at April 29, 2026
Phoenix Contact is a global leader in industrial connection technology, automation systems, and electronic interface solutions. With decades of engineering heritage originating in Germany, the company develops robust components designed to ensure reliable power, data, and signal transmission across demanding manufacturing and industrial environments. The cornerstone of the Phoenix Contact portfolio is its industry-leading selection of connection technologies. The range features an exceptional variety of terminal blocks, including pluggable headers and sockets, highly reliable wire-to-board solutions, and versatile DIN rail terminal blocks. These foundational connectivity components are supported by a comprehensive ecosystem of power distribution blocks, interface modules, marking systems, and accessories engineered for seamless control cabinet wiring. Beyond physical connectivity, Phoenix Contact provides critical components for advanced automation, control, and system protection. The wider offering encompasses a broad spectrum of process controllers, high-efficiency AC/DC converters, and a comprehensive suite of power, safety, and solid-state relays. From precision signal converters and electronic circuit breakers to fiber optic cable assemblies, Phoenix Contact equips engineers with the high-performance technologies required to build secure, highly efficient, and future-ready industrial systems.
About Novapart
Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
Learn more →Stock Shortage Specialist
When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
Request a quote →Compliant Alternatives
We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →