ASM SIPLACE 03056745-01 is a Schmersal SRB301ST-24V-(V.2) safety relay used for emergency-stop and guard-door monitoring. It is the safety-monitoring relay inside the machine safety circuit, not the guard-door switch or mechanical interlock itself.
This distinction is important on legacy SIPLACE equipment because the SRB301ST-24V-(V.2) is a discontinued Schmersal model. A visually similar safety relay or newer successor should not be treated as a direct substitute without checking the exact relay version, supply voltage, terminal assignment and machine safety-circuit configuration. A mismatch can prevent the safety circuit from resetting, keep the machine in a safety-stop condition or create inconsistent E-stop and guard-door diagnostics.
ASM SIPLACE 03056745 Safety Relay Specifications
| Part Number | 03056745-01 |
|---|---|
| Schmersal Model | SRB301ST-24V-(V.2) |
| Part Type | Safety monitoring relay |
| Documented Function | Emergency-stop and guard-door monitoring |
| Operating Voltage | 24 V AC / DC |
| Safety Outputs | 3 safety contacts, STOP 0 |
| Signalling Output | 1 signalling output |
| Safety Capability | SRB301ST series supports applications up to Category 4 / PL e and SIL 3 when used in a correctly designed safety circuit |
| Core Matching Point | Confirm SIPLACE P/N, SRB301ST version, 24 V supply and existing terminal / safety-circuit configuration |
A machine that remains in safety stop does not automatically have a failed 03056745 relay. Before replacement, confirm that all emergency-stop devices are released, guard-door interlocks are correctly actuated, the safety-loop wiring and terminals are intact, and the relay is receiving the correct supply voltage. The relay status and output condition can then be checked against the machine alarm state.
Because 03056745 is part of the personnel-safety circuit, bypassing the relay, bridging safety inputs or modifying the internal circuitry is not an appropriate troubleshooting shortcut. If the fault cannot be isolated, our technical team can review the relay label, machine model, safety alarm, indicator status and wiring photos remotely to help determine whether the fault is in the relay itself or elsewhere in the safety loop.
For other control and safety components, see ASM SIPLACE More SMT Parts. When replacing this legacy relay, exact identification is more important than selecting a newer Schmersal unit by general specifications alone.
03056745-01 is normally available for spare-parts supply, with confirmed orders usually dispatched within 24–48 hours. For legacy SIPLACE safety circuits, we can verify the ASM part number against the existing SRB301ST relay label and provide a formal specification confirmation sheet for internal purchasing approval before replacement.
Send the complete relay label, machine model, required quantity and clear photos of the existing terminal configuration for compatibility verification and formal quotation.