Bosch D290 Four Wire Detector Base, 24VDC

Use the D290 Detector Base where the specifications call for a 24 VDC, four-wire photoelectric smoke detector. When using the detector base, a single pair of wires is run for the initiating circuit and another pair is run for the power. The power circuit connects to the power supply of the control panel or an auxiliary UL Listed power supply. A D275 Power Supervision Module must be installed after the last detector base on each power circuit to properly supervise the circuit voltage.

Features

• 24 VDC, four-wire circuit compatibility
• Dual Form C relays
• Low profile construction
• Easy to install and service
• Molded in UL Listed white ABS plastic