System Sensor B402BA Detector Base

System Sensor B402BA used with System Sensor model 2451A photoelectronic detector head, and model 1451A ionization detector head. The capability of plugging these detectors into a variety of special bases makes them more versatile than equivalent direct-wired models. Refer to the System Sensor catalog for other available plug-in detector bases.

This System Sensor B402BA base intended for use in 4-wire systems; with screw terminals provided for power, remote annunciator, and relay contact connections. These bases also contain a resistor to provide current limiting in the alarm state.

This detector base mounts directly to 3-1/2-inch and 4-inch octagon boxes, and 4-inch square boxes. To mount the base, remove the decorative ring by rotating it in either direction to unhook the snaps before separating the ring from the base. Use the screws supplied with the junction box to attach the base to the box through the appropriate slots in the base (see Figure 1). Position the decorative ring around the base and rotate it in either direction until the ring snaps into place.

All wiring must be installed in compliance with the Canadian Electrical Code, all applicable local codes; and also any special requirements of the authority having jurisdiction, using the proper wire size. The conductors used to connect smoke detectors to control panels and accessory devices color-coded to reduce the likelihood of wiring errors. Improper connections can prevent a system from responding properly in the event of a fire.