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MSI-s/R, MSI-sx/Rx
Configurable Safety Relays
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When increased functionality is required in automated production processes, the configurable MSI-s and MSI-sx Safety Relays are preferred over simple Safety Relays.
These configurable MSI Safety Relays type 4, in accordance with IEC/EN 61496-1, can be flexibly connected as the link between opto-electronic protective devices and the machine control unit. In addition to standard functions such as start/restart interlock and contactor monitoring they also feature a type 2 test monitoring. The MSI-sx ("extended") model also enables the connection of E-STOP control devices or Safety Switches.
Furthermore switching cycles can also be counted and automatically signal when a pre-selected value is reached. Preventive maintenance is possible with this warning in good time before a device failure, which in turn provides additional reliability with regard to system availability.
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| Special features |
- Combined guarding types by connecting up to 4 AOPDs
- Additional E-STOP control device or Safety Switch can be connected (MSI-sx/Rx)
- Relay switching cycle counting for preventive maintenance (MSI-sx/Rx)
- Potential-free safety-related switching outputs
- Contact load rating, 5 A
- Plug-in connection terminals and output modules
- Interface for PC-supported diagnostics and easy start-up
- Housing width, 35 mm
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| Important technical data, overview |
| Type in accordance with IEC/EN 61496-1 (Annex A) |
4 |
| SIL in accordance with IEC 61508 and SILCL in accordance with IEC/EN 62061 |
On request |
| Performance Level (PL) in accordance with EN ISO 13849-1 |
On request |
| Category in accordance with EN ISO 13849 |
Up to 4 (depending on the category of the upstream protective device) |
| Stop category in accordance with IEC/EN 60204-1 |
0 |
| Supply voltage |
24 V DC, ±20 % |
| Response time |
22 to 64 ms depending on safety sensor |
| Safety-related switching outputs (OSSDs) |
MSI-s/R: 2 relay outputs (NO)
MSI-sx/Rx: 3 relay outputs (2 NO, 1 NC) |
Secondary switching device (SSD),
only MSI-sx/Rx |
Relay output (NO) |
| Temperature range, operation |
0...+55 °C |
| Temperature range, storage |
-25...+70 ° C |
| Dimensions (W x H x D) |
35 mm x 99 mm x 113.6 mm |
| Functions |
MSI-s/R |
MSI-sx/Rx |
| Max. number of type 2 AOPDs or E-STOP control devices (category 2) |
2 |
4 |
| Max. number of type 4 AOPDs or E-STOP control devices (category 4) |
1 |
2 |
| Start/restart interlock (RES), optionally with/without |
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| Static contactor monitoring (EDM) |
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| Dynamic contactor monitoring (EDM) |
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| Cross circuit monitoring |
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| PC diagnostics interface |
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| Relay switching cycle counter for preventive maintenance |
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| System error signal output |
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| Secondary switching device (SSD) – output |
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