System Sensor B401BH - Manual

D400-50-00 1 I56-0612-006R
B401BH and B401BHA
Sounder Bases
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
BEfORE INSTALLINg
Please read the System Smoke Detector Application Guide, which provides
detailed information on detector spacing, placement, zoning, wiring, and
special applications. Copies of this manual are available from System Sen-
sor. NFPA 72 and NEMA guidelines should be observed. (For installation
in Canada, refer to CAN/ULC-S524, Standard for the Installation of Fire
Alarm Systems and CEC Part 1, Sec. 32.)
NOTICE: This manual should be left with the owner/user of this equipment.
IMPORTANT: The detector used with these bases must be tested and main-
tained regularly following NFPA 72 requirements. The detector should be
cleaned at least once a year.
gENERAL DESCRIpTION
Models B401BH and B401BHA sounder bases are intended for use with Sys-
tem Sensor 400 Series plug-in sensor heads in conventional 2-wire plug-in
systems. Refer to systems manuals for the maximum allowable number of
units per loop. The B401BH requires an external 24VDC (nominal) supply
with reverse polarity capability. The connections of the external supply (termi-
nals 1 and 2) and the initiating loop (terminals 3, 4, and 5) are isolated in the
B401BH to prevent electrical interaction between them.
When the detector head’s visible LEDs are latched on for approximately 10
seconds, the associated horn sounds. A loop of horns can be made to sound
by reversing the polarity of the external supply.
NOTE: When the associated system is NOT used as a supplementary evacua-
tion system, the external 24VDC supply must be treated as a component of the
main power supply system with the result that it falls under the requirements
of NFPA 72.
B401BH AND B401BHA TERMINALS
No. Function
1
External Supply Positive (+)
2 External Supply Negative (–)
3 Negative (–) V
4 Positive (+) V In
5 Positive (+) V Out
Terminals 3, 4, and 5 are used for the communication/initiating circuit.
INSTALLATION WIRINg gUIDELINES
All wiring must be installed in compliance with the National Electrical Code
and all applicable local codes and any special requirements of the authority
having jurisdiction, using the proper wire size. The conductors used to con-
nect smoke detectors to control panels and accessory devices should be color-
coded to reduce the likelihood of wiring errors. Improper connections can
prevent a system from responding properly in the event of a fire.
SpECIfICATIONS
Base Diameter:
6 inches (152 mm)
Base Height (less base and sensor): 0.75 inches (19mm)
Weight: 0.3 lb. (140 g)
Operating Temperature Range: 14° to 140°F (–10° to +60°C)
Operating Humidity Range: 10% to 95%, noncondensing
Electrical Ratings
Voltage:
17 to 32 VDC
Standby Current: 1.0 mA maximum
Alarm Current: 15 mA maximum
Maximum Ripple Voltage: 10% of supply voltage
Start-up Capacitance: 200 µF
Horn Input Current Requirement: 600 µA maximum
Sound Output: Greater than 90 dBa measured in anechoic room at 10 feet (3 meters),
24 volts. 85 dBa minimum measured in UL reverberant room.
For signal wiring (the wiring between interconnected detectors), it is recom-
mended that the wire be no smaller than AWG 18. However, the screws and
clamping plate in the base can accommodate wire sizes up to AWG 12. The
use of twisted pair wiring or shielded cable for the power (+ and –) loop is
recommended to minimize the effects of electrical interference on the initiat-
ing loop.
Begin electrical connections by stripping about 3/8” insulation from the end
of the wire. Then, slide the bare end of the wire under the clamping plate and
tighten the clamping plate screw. Break the wire at each terminal to ensure
that the connections are supervised, as shown in Figure 2.
I56-06
12-006R
fIgURE 1. TERMINAL LAyOUT:
C0471-00
fIgURE 2.
C0473-00
DO NOT loop the wire under the clamping plate.
Check the zone wiring of the detector base before the detector heads are in-
stalled. Perform continuity, base polarity, and dielectric tests on the wiring.
Smoke detectors and alarm system control panels have specifications for al-
lowable supervision current. Consult the control panel manufacturer’s speci-
fications for the total loop current supervision allowed for the control panel
being used before wiring the detector loops.