System Sensor B401R User Manual
INSTALLATION AND MAINTENANCE INSTRUCTIONS
B401R Plug-in Detector Base
For use with the following smoke detectors: 1451E and 2451E
Specifications
Diameter: 10.2 cm (4.0 inches)
Height: 2.0 cm (0.8 inches)
Weight: 152 g (0.34 lb.)
Operating Temperature: –10° to +60°C (14° to 140°F)
Operating Humidity: 10% to 93% Relative Humidity
Electrical Ratings — includes base and detector
Voltage: 24 VDC
Maximum Ripple Voltage: 4 Volts peak to peak
Start-up Capacitance: 0.02 µF Maximum
Standby Ratings: 15 VDC Minimum
32 VDC Maximum
120 µA Maximum
Alarm Ratings: 10 mA Minimum at 10.5 VDC
62mA Maximum at 32 VDC
(If used, the RA400Z Remote Annunciator operates within the specified
detector alarm currents.)
Reset Voltage: 2.5 VDC Minimum
A Division of Pittway
System Sensor Europe
Via Caboto 19, 34143, Trieste, Italy
Before Installing
Please thoroughly read the System Sensor Manual I56-407,
Guide For Proper Use of System Smoke Detectors, which provides detailed information on detector spacing, placement,
zoning, wiring, and special applications. Copies of this
manual are available at no charge from System Sensor.
NOTICE: This manual should be left with the owner/user
of this equipment.
IMPORTANT: The detector used with this base must be
tested and maintained regularly following NFPA 72 requirements. The detector used with this base should be cleaned
at least once a year.
General Description
The B401R plug-in detector base is used with System Sensor model 2451E photoelectronic detector head and model
1451E 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 plug-in detector
bases.
The B401R base is intended for use in 2-wire systems, with
screw terminals provided for power, ground, and remote
annunciator connections. The B401R base also contains a
resistor to provide current limiting in the alarm state.
1 I56-351-03
Base Terminals
NO. FUNCTION
1 REMOTE ANNUNCIATOR (+)
2 NEGATIVE (–) V IN, REMOTE ANNUNCIATOR (–)
3 NEGATIVE (–) V OUT
4 NOT USED
5 POSITIVE (+) V IN AND V OUT
NOTE: If remote annunciator is not used, polarity to these
terminals may be reversed.
Mounting
These detector bases mount to typical junction boxes. Install the base to the box using the screws supplied with the
junction box. Figure 2 shows mechanical mounting details.
Wiring Installation Guidelines
All wiring must be installed in compliance with the National Electrical Code and the local codes having jurisdiction. Proper wire gauges should be used. The conductors
used to connect smoke detectors to control panels and accessory devices should be color-coded to prevent wiring
mistakes. Improper connections can prevent a system from
responding properly in the event of a fire.
For signal wiring, (the wiring between interconnected detectors or from detectors to auxiliary devices), it is recommended that single-conductor wire be no smaller than
1.5mm2, and that two- or three-conductor wire be no
smaller than 1.0mm2. For best system performance, alarm
loop conductors should be installed in separate grounded
conduit or shielded cable to protect the alarm loop from extraneous electrical interference.
Figure 1. Terminal layout:
3
2
1
5
4
Figure 2. Mounting base to box:
SHORTING
SPRING
A78-1468-03
Smoke detectors and alarm system control panels have
specifications for allowable loop resistance. Consult the
control panel manufacturer’s specifications for the total
loop resistance allowed for the particular model control
panel being used before wiring the detector loops.
Wiring Instructions
Wire connections are made by stripping about 1 cm (3/8")
of insulation from the end of the wire (use strip gauge
molded in base), sliding the bare end of the wire under the
clamping plate, and tightening the clamping plate screw.
The zone wiring of the detector bases should be checked
before the detector heads are installed. To make this
possible, this base contains a special spring-type shorting
jumper (shown in Figure 2). After a detector base is
properly wired and mounted to an electrical box, make
sure that the shorting spring is in contact with terminal 3.
A78-1468-01
2 I56-351-03
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