Potter TRM-4 Twin Relay Module

The Potter TRM-4 Twin Relay Module provides two isolated Form C relay contacts for compatible addressable fire alarm systems. The module allows a fire alarm control panel to activate external equipment based on programmed system events. In addition, its compact design makes it suitable for many commercial fire alarm control applications.

Dual Form C Relay Control

The Potter TRM-4 includes two isolated sets of Form C contacts. Both relay contacts transfer simultaneously when the control panel activates the module. Therefore, one module can control two relay outputs from a single programmed SLC address.

Each relay provides normally open, normally closed, and common connections. Moreover, the contacts support a resistive rating of 2A at 24 VDC or 0.5A at 125 VAC.

Addressable SLC Operation

The module receives power directly from the two-wire SLC loop. As a result, it does not require an additional power source for module operation. The device uses one address on the SLC loop.

A built-in red LED provides visual status information. During normal operation, the LED flashes when the control panel polls the device. When the relay activates, the LED can provide an active status indication.

Key Features

• Twin relay addressable module
• Two isolated Form C relay contacts
• Both relay contacts activate simultaneously
• 2A at 24 VDC resistive contact rating
• 0.5A at 125 VAC resistive contact rating
• Powered directly from the two-wire SLC loop
• No additional module power required
• Uses one SLC loop address
• Supports Class A and Class B SLC wiring
• Built-in red status LED
• Accepts 22 to 14 AWG wiring
• Mounts to a standard 4-inch or double-gang box
• Designed for compatible Potter addressable systems

Fire Alarm Control Applications

The Potter TRM-4 can support several fire alarm control functions. For example, technicians may use the relay outputs for elevator recall, air handling unit shutdown, or other general-purpose relay applications.

The control panel can program the module to respond to initiating devices such as detectors and pull stations. Therefore, the relay outputs can activate when specific programmed conditions occur within the fire alarm system.

Installation and Compatibility

The module mounts on a standard 4-inch square box or double-gang electrical box. In addition, installers can access the wiring terminals while the module remains mounted in the box. This design helps simplify installation and service.

The operating voltage range is 22 to 24 VDC. Furthermore, the module operates from 32°F to 120°F and supports relative humidity from 0% to 93% in non-condensing conditions.

Always confirm control panel and SLC protocol compatibility before installation. The TRM-4 works with compatible Potter/Nohmi addressable fire alarm systems. Qualified fire alarm professionals should install, program, and test the module according to manufacturer instructions and applicable fire alarm codes.

Overall, this Potter twin relay module provides a practical solution for compatible legacy fire alarm systems that require two simultaneously controlled Form C relay outputs.