System Sensor RRS-MOD

Reversing Relay/synchronization Module designed for i3 Series Detectors with a Built-in Sounder

Condition: New
Brand: System Sensor
Status: Active
SKU: 31551
Manufacturer Part #: RRS-MOD


The RRS-MOD reversing relay/synchronization module enhances the operation of 2- and 4-wire i3™ Series detectors equipped with a sounder.

Installation ease. The RRS-MOD reversing relay/synchronization module includes a Velcro® attachment for easy installation into the fire alarm control panel cabinet. A quick-connect harness and colorcoded wires simplify connections.

Intelligence. The RRS-MOD module’s design is flexible to accommodate virtually any application. It is compatible with both 2- and 4-wire i3 Series detectors operating over 12 V and 24 V systems. The module can be used with either bell/alarm, alarm relay, or NAC outputs, and its field selectable switch accommodates both coded and continuous alarm signals.

Instant inspection. To meet fire alarm requirements, the RRS-MOD reversing relay/synchronization module activates all i3 sounders on a loop when an individual sounder alarms. Additionally, it synchronizes the output of the i3 sounders, regardless of whether the panel’s alarm signal is continuous or coded, to ensure a clear alarm signal.

Additional information

Weight 0.4 lbs
Dimensions 2.50 × 2.50 × 1.00 in



Production Status



  • Is compatible with 2- and 4-wire i3 detectors equipped with a sounder
  • Activates all i3 sounders on a loop when one alarms
  • Synchronizes all i3 sounders on the loop for a clear alarm signal
  • Is usable with bell/alarm, alarm relay, or NAC outputs
  • Has a field-selectable switch to accommodate both coded and continuous alarm signals
  • Allows i3 detector silencing from the panel or keypad
  • Operates on 12 and 24 volt systems
  • Simplifies connections with quick-connect harness and color-coded wires


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RRS-MOD Reversing Relay/ Synchronization Module


System Sensor - Data Sheet