The Model 60 is a Bistable Impulse Latch Relay. When power pulse is applied, the Impulse LED on the top of the relay will illuminate and the relay will change state. Power can then be removed and the relay will remain in that state (mechanical latch). When power pulse is reapplied, the relay will change state and latch.. Specifications: Contacts: DPDT; Mount: 8-Pin; Voltage: 24V AC/DC; Voltage Range: 20-28 VAC/VDC , 24VAC/VDC; Model Number: 60