Potter PAD100-RM Relay Module

The Potter PAD100-RM (P/N 3992705) is an addressable relay module for Potter fire alarm systems. It provides one programmable Form-C relay output on a single SLC address for controlling external equipment in response to fire alarm, supervisory, or trouble conditions at the fire alarm control panel. The most common relay applications include door holder release, elevator recall, HVAC shutdown, fire damper fusible link control circuits, and other building system interfaces that must respond automatically during a fire alarm event.

The PAD100-RM communicates via the fire alarm slc loop, allowing the fire alarm control panel to command the relay and monitor its status with full addressable precision. Every relay activation is logged with an individual device identity — a major advantage over conventional systems where relay outputs give no specific location data. This makes the PAD100-RM ideal for large commercial fire alarm systems where dozens of relay control points must be individually identified in the fire alarm inspection and test records and fire alarm signalling event logs.

For fire alarm equipment supplies contractors and fire alarm parts suppliers managing commercial Potter addressable installations, the PAD100-RM is one of the most versatile output modules in the PAD series. It works alongside the PAD 100-SIM (input-only), PAD-100OROI (relay + input), and PAD 100-TRTI (two relays + two inputs) to cover every combination of monitoring and control needed in a commercial fire alarm signalling system. Whether sourced through a fire alarm supply store or fire alarm wholesale distributor, the PAD100-RM should be a standard stock item for any contractor working with Potter addressable systems. Annual testing of relay functions is required per NFPA 72, and fire alarm inspection stickers should be updated after each successful test cycle.

Assign a unique SLC address before installation. Mount the PAD100-RM inside or adjacent to the controlled equipment enclosure. Connect the Form-C relay contacts to the controlled building system per the system design drawings — verify the relay contact rating meets the current requirements of the connected load. Program relay activation conditions at the fire alarm control panel. Test relay activation during commissioning by triggering the programmed alarm condition and confirming the relay and connected equipment respond correctly. Annual relay testing is required per NFPA 72. Document all relay assignments, activation conditions, and test results in the fire alarm inspection and test records. Update fire alarm inspection stickers and fire alarm tags after each successful annual test cycle. Fire alarm testing signage at the panel should indicate the next scheduled test date per AHJ requirements.

What is the Form-C relay contact configuration?

A Form-C relay has three terminals: Common, Normally Open, and Normally Closed. In the non-alarm state the Common connects to Normally Closed. When the relay activates, the Common connects to Normally Open. This configuration allows both energize-to-activate and de-energize-to-activate building system control from the same relay — giving fire alarm signalling system designers maximum flexibility.

When should I use PAD100-RM vs PAD-100OROI?

Use the PAD100-RM when you only need a relay output at a location with no device monitoring required. Use the PAD-100OROI when you need both a relay output and a supervised input at the same location. The PAD100-RM uses one SLC address for pure output control, making it the most efficient choice when no input circuit is needed.

Can this module be used to activate a fire suppression system releasing circuit?

For fire suppression system releasing applications, verify the relay contact rating and the UL listing of the complete assembly with your fire alarm system designer before installation. Releasing circuit applications have specific NFPA 72 requirements for listed releasing service. Consult the Potter fire alarm control panel documentation to confirm the approved releasing configuration for your system.