Resource module incorporates power supply and safety relays

Paul Boughton

Scientific Technologies (STI) is introducing the RM-2AC resource module that includes a power supply and pair of safety relays, making it an excellent companion for solid-state safety devices.

It provides connection points for all safety device functions and is compatible with STI's MS4600, OF4600-50, PA4600 and OS3100 product families A range of 100 to 240V AC input to the RM-2AC provides the connected safety device with 24V DC required for operation. Additionally, the 35mm DIN configuration requires only 150mm (6 inches) of panel space.

The RM-2AC serves as a central point for terminating all signals to and from a solid-state safety device. Removable terminal blocks facilitate installation and servicing. One NO (normally-open) and one NO/NC (normally-open/normally-closed) safety relay output rated at 250V AC, 6A, can be used as the primary switching device, or can be used to switch a contactor.

The RM-2AC is able to monitor the switching function of a final switching device through the MPCE (machine primary control element) monitoring circuit.

Auxiliary relay outputs are selectable between using the dry-contact relay with one NO/NC 6A contact, or allow the solid-state auxiliary output from the MS4600 or the OS3100 to be passed through.

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