System Sensor COSMOD2W

2-wire interface module (required to use with COSMO-2W models)

  • Factory New
Brand: System Sensor Part #: 31284 Category: Manufacturer Part #: COSMOD2W Tag:


The i4 series module is designed to interface between compatible i4 series combination CO/smoke detectors (Model COSMO-2W and COSMO-4W) and compatible security/fire panels. It can also be used to retrofit compatible i4 series detectors into an existing loop of i3 smoke detector models 2WTA-B or 4WTA-B, without adding wires. The module interprets signals and translates them into a separate smoke zone and a separate CO zone, each with alarm and trouble signals. The module will interconnect the detectors connected to it and alarm them in either Temporal 3 or Temporal 4 pattern. Optional triggers are provided to initiate multiple modules to sound. MOD is not required) Local status indication is provided by 4 LED’s and a 3 position DIP switch enables user configuration.


Weight 0.60 lbs
Dimensions 1.00 × 6.04 × 6.40 in



  • Easily integrates up to 12 compatible detectors to a wide range of control panels
  • 2-wire module is compatible with COSMO-2W combination detectors and 2WTA-B smoke detectors.
  • 4-wire module is compatible with COSMO-4W combination detectors and 4WTA-B smoke detectors.
  • Sends distinct smoke and CO signals from i4 detectors to the panel
  • LED indication shows when a detector on the loop requires cleaning or maintenance (2-wire detectors only)
  • Initiates the EZ Walk loop test (2-wire detectors only)
  • Module interconnects the sounders of all devices connected to it. No RSS-MOD is required. Optional trigger inputs are provided to sound multiple modules.


i4 Series Combination CO/Photoelectric Smoke Detector
System Sensor – Data Sheet
i4 Series Interface Module COSMOD2W and COSMOD4W
System Sensor – Installation and Maintenance Instructions