snippet: 8 Amp Dual Relay Module. The modules provide two independently controlled Form C contacts while utilizing only one address point at the Signaling Line Circuit (SLC). The two Form C contacts can be used for a variety of Normally Open and Normally Closed applications such as fan, elevator and door control, or auxiliary notification. As the modules use mechanically latching relays, a separate 24 VDC power supply is not required. They fit into a standard 4-inch square or double-gang electrical back box

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