Modules & Relays

When you have relay modules(monitor or control) for fa devices or tampers, waterflows etc. how do you know whether you need a separate 24v cable or you can use the fire alarm data(idc circuit) circuit? Thanks.

Modules all are SLC devices. Relay and monitor does not require and external 24v. Only a Control module requires and external 24v… hopes this helps.

JR thank you. Aren’t there dual input modules that are monitoring and control. The control portion would need separate 24v?