BRK RM4
MFR Part #:RM4
- Amperage Rating :0.02 A
- Contact Rating :15 A at 120 VAC/30 VDC
- Manufacturer Name :BRK
- Voltage Rating :120 VAC/30 VDC
The BRK RM4 relay module is a wired alarm accessory designed to activate auxiliary devices when interconnected smoke, CO, or heat alarms are triggered. It is ideal for residential or light commercial setups that require automated responses such as lights, sirens, or exhaust systems.
- BRK® RM4 Smart Relay, 120 VAC, 0.02 A, 15 A at 120 VAC/30 VDC, Specifications Met: CSA 6.19, UL 217, 2034, 539, ULC S-531, ULCS-530
Smart Interconnect compatibility → Unified alarm response
Works with BRK and First Alert “Smart Interconnect” smoke, CO, and heat alarms, ensuring all connected devices trigger simultaneously.
Auxiliary device activation → Extends system functionality
Activates external devices (e.g., lights, bells, door closers, exhaust fans) when an alarm sounds, improving safety signaling and automated response.
Automatic relay reset → Minimal manual intervention
Relay contacts deactivate automatically a few seconds after the alarm stops, simplifying operation and system recovery.
Flexible installation → Supports various configurations
Can be installed next to an alarm or remotely (up to 1000 ft using appropriate wiring), providing design flexibility.
Compact design → Fits standard electrical boxes
Designed to fit most standard junction boxes for straightforward integration into existing electrical setups.
High contact rating → Supports multiple device types
Handles resistive and motor loads (up to 15 amps, 1/3 H.P.), enabling connection to a wide range of auxiliary equipment.
Specification
Details
Product Type
Alarm relay module
Model
BRK RM4
Power Source
120V AC, 60Hz (wire-in)
Operating Current
0.02 amps (standby/alarm)
Dimensions
3.5 in (L) x 1.5 in (H)
Weight
2.2 oz
Temperature Range
40°F (4°C) to 100°F (38°C)
Humidity Range
10% to 90% RH
Interconnect Capacity
Up to 18 total units (max. 12 smoke alarms)
Wiring Distance
Up to 1000 ft (300 m) with #18 AWG or larger
Contact Ratings
120V AC (15A resistive, 1/3 HP motor), 30V DC (15A)
Installation
Must be installed in a junction box
Listings (Standards)
UL217, UL2034, UL539, ULC S-531, CSA6.19, ULC S-530
Residential safety systems
Trigger lights, sirens, or exhaust fans when smoke or CO alarms activate.
Multi-room alarm interconnection setups
Ensure auxiliary devices respond when any interconnected alarm is triggered.
Light commercial environments
Activate door closers, exit indicators, or audible alerts for enhanced safety signaling.
Remote relay installations
Enable auxiliary device activation even when installed away from the primary alarm location.
Compatible with:
- BRK smoke alarms
- BRK carbon monoxide alarms
- BRK heat alarms
- First Alert “Smart Interconnect” alarms
Supports interconnection of:
- Up to 18 total alarm units
- Maximum of 12 smoke alarms
Works with auxiliary devices such as:
- Lights
- Bells
- Door closers
- Sirens
- Exit signals
- Escape lights
- Exhaust fans
What does the BRK RM4 relay module do?
The BRK RM4 relay module activates external auxiliary devices when an interconnected smoke, CO, or heat alarm is triggered.
Can the RM4 be installed away from the alarm?
Yes. It can be installed remotely up to 1000 feet from the alarm using appropriate wiring.
What devices can be connected to the RM4 relay?
It can control devices such as lights, bells, sirens, door closers, exit signals, and exhaust fans, depending on wiring and load requirements.
How many alarms can be interconnected with the RM4?
The system supports up to 18 interconnected units, with a maximum of 12 smoke alarms.
Does the BRK RM4 relay module reset automatically after an alarm?
Yes. The relay contacts automatically deactivate a few seconds after the alarm stops sounding.