The locally configurable safety relay module is used for monitoring the zero-speed and speed of moving parts in systems and machines. To monitor movement, the safety relay module evaluates the signals of proximity switches.
    
  
  PSR-MM20-2NO-1DO-24DC-SC
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  Safety relay module
    
      2702374
      
      
    
  
      Safety relay module for speed or zero-speed monitoring up to SIL 3, Cat. 4, PL e, suitable for connecting two proximity switches, pluggable screw terminal block, width: 17.5 mm
      Free download available.
      Downloads
    
  Product details
| Product type | Safety device | 
| Application | Zero-speed safety relay | 
| Over-speed safety relay | |
| Control | 2-channel | 
| Relay type | Electromechanical relay with force-guided contacts in accordance with IEC/EN 61810-3 | 
| Insulation characteristics | |
| Overvoltage category | III | 
| Degree of pollution | 2 | 
| Times | |
| Typical response time | See Section “Maximum response time”. | 
| Response time | See Section “Maximum response time”. | 
| Typical release time | 25 ms (When requested via A1; applicative deactivation via A1/A2 is not permitted) | 
| Restart time | 2.5 s (Boot time) | 
| Start pulse length | min. 200 ms (manual start) | 
| max. 10 s (manual start) | |
| Maximum power dissipation for nominal condition | 4 W (UB = 30 V, IL = 6 A) | 
| Nominal operating mode | 100% operating factor | 
| Interfaces | Proximity switches | 
| Rated insulation voltage | 250 V | 
| Rated surge voltage/insulation | See data sheet, section “Insulation coordination”. | 
| Supply | |
| Designation | A1/A2 | 
| Rated control circuit supply voltage US | 24 V DC -20 % / +25 % | 
| Rated control supply current IS | typ. 70 mA | 
| Power consumption at US | typ. 1.7 W | 
| Inrush current | < 6 A (Δt = 1 ms at Us) | 
| Filter time | 1 ms (in the event of voltage dips) | 
| Protective circuit | Serial protection against polarity reversal; Suppressor diode | 
| Protection | 1 A (slow-blow, required externally) | 
| Digital: Start circuit (S34) | |
| Description of the input | Non-safety-related, current sinking | 
| IEC 61131-2 type 3 | |
| Number of inputs | 1 | 
| Input voltage range "0" signal | 0 V DC ... 5 V DC | 
| Input voltage range "1" signal | 11 V DC ... 30 V DC | 
| Input current range "0" signal | 0 mA ... 1.5 mA | 
| Max. permissible overall conductor resistance | 150 Ω | 
| Protective circuit | Suppressor diode | 
| Current consumption | typ. 3 mA (at US) | 
| Measurement | |
| Input name | Proximity switch inputs | 
| IN1, IN2 | |
| Description of the input | Safety-related, current sinking/current sourcing | 
| Number of inputs | 2 | 
| Input voltage range "0" signal | Open circuit | 
| Input voltage range "1" signal | 15 V ... 30 V (Current, inward) | 
| 0 V ... 2 V (Current, outward) | |
| Input current range "0" signal | Open circuit | 
| Precision | ± 2 % (in reference to the parameterized limit value) | 
| Limit frequency | max. 4 kHz (Minimum pulse duration: 45 µs) | 
| min. 0.1 Hz (Minimum pulse duration: 45 µs) | |
| Duty factor | 5 % ... 95 % (Push-pull operation, observe minimum pulse duration) | 
| 55 % ... 95 % (PNP operation, observe minimum pulse duration) | |
| Hysteresis | 20 % | 
| Pulse width | 45 µs (Minimum pulse duration) | 
| Max. permissible overall conductor resistance | 150 Ω | 
| Protective circuit | Suppressor diode | 
| Current consumption | 5 mA (Current, inward) | 
| -7 mA (Current, outward) | |
| Relay: Enabling current paths (13/14, 23/24) | |
| Output description | 1 N/O contact each, safety-related, floating | 
| Number of outputs | 2 | 
| Contact switching type | 2 enabling current paths | 
| Contact material | AgSnO2 | 
| Switching voltage | min. 12 V AC/DC | 
| max. 250 V AC/DC | |
| Switching power | min. 36 mW | 
| Inrush current | min. 3 mA | 
| max. 6 A | |
| Switching capacity | 4 A (24 V (DC13)) | 
| 2 A (250 V (AC15)) | |
| Limiting continuous current | 6 A | 
| Sq. Total current | 72 A2 (observe derating) | 
| Switching frequency | 0.1 Hz | 
| Mechanical service life | 10x 106 cycles | 
| Output fuse | 6 A gL/gG | 
| Signal: Digital signal output (MO) | |
| Output description | non-safety-related | 
| PNP | |
| Number of outputs | 1 | 
| Voltage | approx. 22 V DC (Us - 2 V) | 
| Current | max. 100 mA | 
| Maximum inrush current | 500 mA (Δt = 10 ms at Us) | 
| Ohmic load | min. 240 Ω | 
| Switching frequency | 0.1 Hz (Resistive load) | 
| Protective circuit | Suppressor diode | 
| Short-circuit protection | Yes | 
| Discharging circuit | no | 
| Signal: Analog signal output (AO+, AO-) | |
| Output description | non-safety-related | 
| Analog | |
| Requirements on the connecting cables: 2-conductor, shielded, twisted pair | |
| Number of outputs | 1 | 
| Output voltage range | 0 V ... 10.5 V ±100 mV (The tolerance may be greater under EMC influence) | 
| Load/output load voltage output | ≥ 2 kΩ | 
| Protective circuit | Suppressor diode | 
| Short-circuit protection | Yes | 
| Signal rise time | 1 ms (RL = 2 kΩ, jump from 0 V to 10.5 V) | 
| Control interval time | 10 ms | 
| Control time | max. 200 ms (For an accuracy of ±500 mV) | 
| max. 400 ms (For an accuracy of ±100 mV) | |
| Max. permissible overall conductor resistance | 6 Ω | 
| Connection technology | |
| pluggable | yes | 
| 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 | 24 ... 12 | 
| Stripping length | 7 mm | 
| Screw thread | M3 | 
| Tightening torque | 0.5 Nm ... 0.6 Nm | 
| Status display | 6 x LED (green, red) | 
| Operating voltage display | 1 x LED (green, red) | 
| Width | 17.5 mm | 
| Height | 112.2 mm | 
| Depth | 114.5 mm | 
| Color (Housing) | yellow (RAL 1018) | 
| Housing material | PA | 
| Safety data | |
| Stop category | 0 | 
| Safety data: EN ISO 13849 | |
| Category | 4 | 
| Performance level (PL) | e (4 A DC13, 1095 switching cycles/year or 2 A DC13, 2 A AC15, 8760 switching cycles/year) | 
| Safety data: IEC 61508 - High demand | |
| Safety Integrity Level (SIL) | 3 | 
| Safety data: EN IEC 62061 | |
| Safety Integrity Level (SIL) | 3 | 
| Ambient conditions | |
| Degree of protection | IP20 | 
| Min. degree of protection of inst. location | IP54 | 
| Ambient temperature (operation) | -25 °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 | 
| Mounting type | DIN rail mounting | 
| Assembly note | See derating curve | 
| Mounting position | vertical or horizontal | 
| Item number | 2702374 | 
| Packing unit | 1 pc | 
| Minimum order quantity | 1 pc | 
| Product key | DNA241 | 
| GTIN | 4055626138145 | 
| Weight per piece (including packing) | 170.81 g | 
| Weight per piece (excluding packing) | 140.88 g | 
| Customs tariff number | 85371098 | 
| Country of origin | DE | 
ECLASS
| ECLASS-13.0 | 27371811 | 
| ECLASS-15.0 | 27371811 | 
| ECLASS-15.0 ASSET | 27250101 | 
ETIM
| ETIM 9.0 | EC001448 | 
UNSPSC
| UNSPSC 21.0 | 39122331 | 
| EU RoHS | |
| Fulfills EU RoHS substance requirements | Yes | 
| Exemption | 7(a), 7(c)-I | 
| China RoHS | |
| Environment friendly use period (EFUP) | EFUP-50 An article-related China RoHS declaration table can be found in the download area for the respective article under "Manufacturer declaration". For all articles with EFUP-E, no China RoHS declaration table issued and required. | 
| EU REACH SVHC | |
| REACH candidate substance (CAS No.) | Lead (CAS: 7439-92-1) | 
| 2,2',6,6'-tetrabromo-4,4'-isopropylidenediphenol (CAS: 79-94-7) | |
Compatible products
Your advantages
Up to Cat. 4/PL e in accordance with EN ISO 13849-1, SIL 3 in accordance with EN IEC 62061, SIL 3 in accordance with IEC 61508
        Compatible with 3-wire proximity switches for motion monitoring
        Locally configurable
        Individually adjustable switching threshold in the range 0.5 Hz … 315 Hz
        Low housing width of just 17.5 mm
        PHOENIX CONTACT Israel Ltd.
        P.O.B. 1799 Industrial Park Hasharon
        Kadima 60920