Official DistributorSKU
MPN
PSR-MS21-1NO-1DO-24DC-SC
Weight
0.083 kg
Series PSR-MS
PSR-MS21-1NO-1DO-24DC-SC - Safety relays
Safety relay for failsafe controllers up to SILCL 3, Cat. 4, PL e, 1-channel operation, autostart, 1 enabling current path, US = 24 V DC in accordance with IEC 61131-6, fixed screw terminal block
- Up to Cat. 4/PL e in accordance with EN ISO 13849-1, SIL 3 in accordance with EN IEC 62061
- Low housing width of just 6.8 mm
- 1-channel control
- 1 enabling current path, 1 digital signal output
- Couples digital output signals from failsafe controllers to I/O devices (valves, etc.) for electrical isolation and power adaptation
- Automatic activation
Technical Specifications
Product properties
| Product family | PSRmini |
| Application | Controllers |
| Relay type | Electromechanical relay with force-guided contacts in accordance with IEC/EN 61810-3 |
Times
| Typical response time | < 150 ms (automatic start) |
| Typ. starting time with Us | < 250 ms (when controlled via A1) |
| Typical release time | < 20 ms (when controlled via A1) |
| Restart time | < 1 s |
| Recovery time | < 500 ms |
Electrical properties
| Maximum power dissipation for nominal condition | 3.1 W (at US = 30 V, IL² = 36 A²) |
| Nominal operating mode | 100% operating factor |
Air clearances and creepage distances between the power circuits
| Rated Insulation Voltage | 250 V AC |
| Rated Insulation Voltage | 250 V AC |
| Rated surge voltage/insulation | Safe isolation, reinforced insulation 6 kV between input circuit and enabling current path (13/14)Basic insulation 4 kV between all current paths and housing |
Supply
| Rated control circuit supply voltage US | 19.2 V DC ... 30 V DC |
| Rated control circuit supply voltage US | 24 V DC -20 % / +25 % (at A1) |
| Rated control supply current IS | typ. 35 mA |
| Power consumption at US | typ. 840 mW |
| Inrush Current | 150 mA (Δt = 25 ms at Us) |
| Filter time | 2.5 ms (at A1 in the event of voltage dips at Us) |
| Filter time | max. 3 ms (at A1; test pulse width; blanking pulses/dark test) |
| Filter time | 1 s (at A1; test pulse rate; blanking pulses/dark test) |
| Filter time | Where test pulse width ≤ 1 ms: test pulse rate = 5 x test pulse width |
| Filter time | max. 1 ms (at A1; test pulse width; switch-on pulses/light test) |
| Filter time | 100 ms (at A1; test pulse rate; switch-on pulses/light test) |
| Filter time | Unless switch-on pulses/light tests are safety-related, they should be disabled. |
| Protective circuit | Surge protection; Suppressor diode |
| Protective circuit | Protection against polarity reversal for rated control circuit supply voltage |
Digital
| Inrush Current | < 10 mA (with Us/Ix to S35) |
| Max. permissible overall conductor resistance | 150 Ω |
| Voltage at input/start and feedback circuit | 24 V DC -20 % / +25 % |
| Current consumption | < 2 mA (with Us/Ix to S35) |
Relay: Enabling current path
| Output description | safety-related N/O contacts |
| Number of Outputs | 1 (undelayed) |
| Contact switching type | 1 enabling current path |
| Contact Material | AgSnO2 |
| Switching voltage | min. 12 V AC/DC |
| Switching voltage | max. 250 V AC/DC (Observe the load curve) |
| Switching capacity | min. 60 mW |
| Inrush Current | min. 3 mA |
| Inrush Current | max. 6 A |
| Limiting Continuous Current | 6 A (observe derating) |
| Sq. Total current | 36 A2 (observe derating) |
| Switching frequency | max. 0.5 Hz |
| Mechanical service life | 10x 106 cycles |
| Output fuse | 6 A gL/gG (N/O contact) |
| Output fuse | 4 A gL/gG (for low-demand applications) |
Signal
| Output description | non-safety-related |
| Number of Outputs | 1 (digital, PNP) |
| Voltage | typ. 21 V DC (Voltage at terminal block “24V” - 3 V) |
| Current | max. 100 mA |
| Maximum Inrush Current | 500 mA (Δt = 1 ms at Us) |
| Short-circuit protection | Yes |
Connection technology
| pluggable | no |
Conductor connection
| Connection Method | Screw connection |
| Conductor cross section rigid | 0.2 mm² ... 2.5 mm² |
| Conductor cross section flexible | 0.2 mm² ... 2.5 mm² |
| Conductor cross-section AWG | 26 ... 12 |
| Stripping length | 12 mm |
| Screw thread | M3 |
| Tightening torque | 0.5 Nm ... 0.6 Nm |
Signaling
| Status display | 2 x green LEDs |
| Operating voltage display | 1 x green LED |
Dimensions
| Width | 6.8 mm |
| Height | 93.1 mm |
| Depth | 102.5 mm |
Material specifications
| Color (Housing) | yellow (RAL 1018) |
| Housing Material | PBT |
Safety data
| Stop category | 0 |
Safety data: EN ISO 13849
| Category | 4 |
| Performance level (PL) | e (4 A DC13; 5 A AC15; 8760 switching cycles/year) |
Safety data: IEC 61508 - High demand
| Safety Integrity Level (SIL) | 3 (4 A DC13; 5 A AC15; 8760 switching cycles/year) |
Safety data: IEC 61508 - Low demand
| Safety Integrity Level (SIL) | 3 |
Safety data: EN IEC 62061
| Safety Integrity Level (SIL) | 3 (4 A DC13; 5 A AC15; 8760 switching cycles/year) |
Ambient conditions
| Degree of Protection | IP20 |
| Min. degree of protection of inst. location | IP54 |
| Ambient Temperature (Operation) | -40 °C ... 60 °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 |
CE
| Certificate | CE-compliant |
Air clearances and creepage distances between the power circuits
| Standards/regulations | DIN EN 50178 |
Mounting
| Mounting Type | DIN rail mounting |
| Assembly instructions | See derating curve |
| Mounting Position | vertical or horizontal |
Accessories
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Additional Information
| Pack Size | 1 |
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