Bosch Appliances Carbon Monoxide Alarm F220B6RS User Manual

Fire Alarm Systems | F220‑B6RS 24 VDC Four‑wire Detector Base with Sounder

The F220‑B6RS 24 VDC Four-wire Detector Base with
Sounder meets the requirements of UL464 for a notification
device and works with the F220 Series Photoelectric Smoke
and Heat Detectors. Power the sounder from the control
panel's NAC circuit or from auxiliary power.

Sounder Configuration
The output (sound pattern and synchronization) of the
sounders on a detection loop can be configured in four
different ways. Refer to the F220 Series Detectors
Installation Instructions (P/N: 4998138694) for instructions
on wiring and setting the F220‑B6RS detector base for
these configurations:
1. NAC Follower (Direct Wire) Configuration: In this

configuration, the sounders on the loop follow the

signal on the NAC terminals as programmed at the

control panel. Refer to the control panel's installation

manual for NAC configuration instructions. This

configuration requires an extra pair of supervised wires

for the sounder circuit.

2. Reverse Polarity Configuration: In this configuration

(not suitable for synchronized protocols; such as,

Cooper Wheelock, Gentex, or System Sensor), the

sounders in a loop activate due to reversed polarity on

the power line. The output pattern is not controlled by

the base in this operating mode; it follows the reversing

power signal on the detector head's terminals as

programmed at the control panel.

3. Local Annunciation Configuration: In this

configuration, each sounder is individually set for one

of the following patterns: Temporal (Code 3), March

Time, or Continuous Tone. Use a D275 Power

Supervision Module in this configuration to supervise

the detector loop.

4. Interconnection Configuration: In this configuration,

up to five detectors supervise the end of the detector

loop when interconnected by a common wire. All

sounders within the group activate together. Set all

units for the same output pattern (Temporal [Code 3],

March Time, or Continuous Tone). All interconnected

detectors are synchronized with and sound the pattern

of the originating detector.

The maximum wire length for connecting up to five units

is:

18 AWG (1.2 mm)

300 ft (91 m)

16 AWG (1.5 mm)

450 ft (137 m)

14 AWG (1.8 mm)

750 ft (229 m)

To ensure interconnected units can signal an
alarm, the line load after the last detector on

▶ Easy installation
▶ Interchangeable detector heads
▶ UL listed when used with F220 Series Detector Heads
▶ UL464 approved sounder driven by the detector head