dl-breadcrumbs__homedl-breadcrumb-item__separatorAC500-S safety PLCdl-breadcrumb-item__separatorSafety user manual V1.3.2dl-breadcrumb-item__separator...dl-breadcrumb-item__separatorAC500-S safety modulesdl-breadcrumb-item__separatorSafety CPU - SM560-S / SM560-S-FD-1 / SM560-S-FD-4dl-breadcrumb-item__separatorFunctionalitydl-breadcrumb-item__separatorPower supply supervision
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Power supply supervision

This is the web edition of the original ‎⮫ AC500-S safety user manual, version 1.3.2. This web edition is provided for quick reference only. The original safety user manual must be used to meet functional safety application requirements.

The internal power supply (+3.3 V) of the safety CPU is supervised for under- and overvoltage. In case of under- or overvoltage is detected, the safety CPU goes to a SAFE STOP state (no valid telegrams are generated by the device) with I-ERR LED = ON. To control restart of the safety CPU after power supply is back within an allowed voltage range, one can set the maximum allowed number of the safety CPU restarts using POU SF_MAX_POWER_DIP_SET⮫ “SF_MAX_POWER_DIP_SET”.

Contact ABB technical support for more details.