The FSM770 monitors the status of a critical switch or trip and mimics its behaviour at a control station, and features:

• Pilot Contact relay that mimics the remote measured contact.
• Power Fail relay to detect loss of power to the FSM770.
• Short Circuit in the Pilot Cable relay.
• Open Circuit in the Pilot Cable relay.
• 2000Vrms isolation.
• Front adjustments for Open and Short to allow for large series resistances.
• Front adjustments for Cable Trim for different length cables.
• Available in two wide-swing power supply versions covering all popular power supplies.

Common applications include:

• Fail-safe temperature or pressure alarms on boilers.
• Fail-safe process alarm monitoring