Coupling relay - PSR-PC50-1NO-1DO-24DC-SP

Coupling relay for SIL 3 low-demand applications, couples digital output signals to the I/O, 1 enabling current path, module for F&G applications, test pulse filter, width: 17.5 mm, pluggable Push-in terminal block

Product Details

Utilization restriction
EMC note EMC: class A product, see manufacturer's declaration in the download area
Utilization restriction
CCCex note Use in potentially explosive areas is not permitted in China.

Product type Coupling relay
Installation location IP 54
Application Safe switch on
Low demand
Relay type Electromechanical relay with force-guided contacts in accordance with IEC/EN 61810-3
Insulation characteristics
Overvoltage category III
Typ. starting time with Us 30 ms (when controlled via A1)
Typical release time 30 ms (when controlled via A1)
Recovery time 1 s

Maximum power dissipation for nominal condition 1.56 W
Nominal operating mode 100% operating factor
Rated control circuit supply voltage US 20.4 V DC ... 26.4 V DC
Rated control circuit supply voltage US 24 V DC -15 % / +10 % (A1/A2)
Rated control supply current IS typ. 65 mA (A1/A2)
Inrush current ≤ 200 mA (A1/A2)
Filter time < 2 ms (Test pulse duration)
≥ 100 ms (Test pulse rate)
Diagnostic supply voltage UD 24 V DC -15 % / +10 % (24V/A2)
Input current at UD typ. 15 mA (24V/A2; depending on load M1 +100 mA)
Inrush current at UD 2.5 A (24V/A2; for 10 µs)
Protective circuit Overload protection; Suppressor diode
Rated insulation voltage 250 V AC
Rated surge voltage/insulation 6 kV/safe isolation (through protective impedance)

Number of inputs 3 (Test point for proof test)
Inrush current 200 mA (Inputs TP1, TP2 and TP3)
Current consumption typ. 20 mA (Input TP1)
typ. 18 mA (Input TP2)
typ. 35 mA (Input TP3)

Relay: 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
Switching voltage min. 15 V AC/DC without diagnostics
min. 20 V AC/DC (with diagnostics)
max. 250 V AC
max. 125 V DC
Switching capacity min. 1.5 W
Inrush current min. 100 mA
max. 5 A
Max. permissible overall conductor resistance < 10 Ω (LO/LO' and NI/NI' and load resistance in the event of a short circuit)
Limiting continuous current 5 A
Switching frequency max. 0.5 Hz
Diagnostic threshold 20 Ω ... 18 kΩ (lower/upper)
Mechanical service life approx. 5x 107 cycles
Output description non-safety-related
Number of outputs 1 (digital)
Voltage 23 V DC
Current max. 100 mA
Short-circuit protection no
Output fuse 150 mA fast blow

Connection technology
pluggable yes
Conductor connection
Connection method Push-in connection
Conductor cross section solid 0.2 mm² ... 1.5 mm²
Conductor cross section flexible, with ferrule without plastic sleeve 0.25 mm² ... 1.5 mm² (only together with CRIMPFOX 6)
Conductor cross-section AWG 24 ... 16

Status display Green LED
Operating voltage display Yellow LED
Indication Red LED

Width 17.5 mm
Height 117.4 mm
Depth 114.5 mm

Housing material Polyamide
Housing color yellow

Safety data: IEC 61508 - Low demand
Equipment type Type A
Safety Integrity Level (SIL) 3 (15 % of total SIL)
Safe Failure Fraction (SFF) 99.62 %
MTBF 110.5 Years
λSU 849 FIT
λSD 4.27 FIT
λDU 3.40 FIT
λDD 4.21 FIT
Probability of a hazardous failure on demand (PFDAVG) 1.49 x 10-4
1.49 x 10-5 (for proof test interval = 1 year)
Proof test interval 120 Months
Duration of use 240 Months

Ambient conditions
Degree of protection IP20
Min. degree of protection of inst. location IP54
Ambient temperature (operation) -20 °C ... 55 °C
Ambient temperature (storage/transport) -40 °C ... 65 °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) 2g

Identification  II 3 G Ex nA nC IIC T4 Gc
Certificate DEMKO 14 ATEX 1284X
Identification Ex nA nC IIC T4 Gc
Certificate IECEx ULD 14.0003X
Identification cULus
Certificate E140324
Identification 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
Certificate E360692
Identification C, EMC2
Certificate 11253-14 HH
Certificate CE-compliant

Air clearances and creepage distances between the power circuits
Standards/regulations DIN EN 50178

Mounting type DIN rail mounting
Mounting position vertical or horizontal

Item number 2904665
Packing unit 1 pc
Minimum order quantity 1 pc
Sales Key C18
Product Key DNA182
Catalog Page Page 253 (C-6-2019)
GTIN 4046356919920
Weight per Piece (including packing) 221.2 g
Weight per Piece (excluding packing) 212.4 g
Customs tariff number 85364900
Country of origin DE


ECLASS-9.0 27371819
ECLASS-10.0.1 27371819
ECLASS-11.0 27371819


ETIM 8.0 EC001449


UNSPSC 21.0 39122200


Approval ID: RU C-DE.A*30.B.01082


Approval ID: TAA00002VZ

UL Listed

Approval ID: FILE E 140324

cUL Listed

Approval ID: FILE E 140324

Functional Safety

Approval ID: 968/FSP 1011.02/20


Approval ID: IECEx ULD 14.0003 X

cUL Listed

Approval ID: File E 360692

UL Listed

Approval ID: File E 360692


Approval ID: DEMKO 14 ATEX 1284 X

cULus Listed

cULus Listed

REACh SVHC Lead 7439-92-1
China RoHS Environmentally Friendly Use Period = 50 years
For information on hazardous substances, refer to the manufacturer’s declaration available under “Downloads”

Your advantages

Up to SIL 3 in accordance with IEC 61508
Easy proof test according to IEC 61508 thanks to integrated signal contact
Installation in zone 2 permitted
Couples digital output signals from failsafe controllers to I/O devices (valves, etc.) for electrical isolation and power adaptation