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Output data
- 24 channels with a digital control signal 24 V (8 outputs per phase)
- Max. 20 kW switching capacity at 230 V or 36 kW at 400 V per output
Supply voltage monitoring
The connected 24 V supply is monitored for failure. In the event of failure, the outputs to the solid state relay (SSR) are deactivated.
The drivers of the control outputs are monitored for their function.
Fuses
Fuses are to be set externally for each channel.
Diagnostics facilities
Two alternative diagnostic methods are possible:
- By diagnosing the voltages from the load circuit, the following faults can be detected:
- Solid state relay (SSR) cannot be activated, supply line to the SSR is interrupted or external channel fuse has failed
- The solid state relay (SSR) cannot be deactivated; emitter or cable break
- By diagnosing via the external SM724I current measuring module, the following faults can additionally be detected:
- Rated output on channel is exceeded
- Rated output on channel is not reached
This diagnosis is recommended for detecting faults in emitters connected in parallel.