JCI-60130:A2 • 9/16/09 — Page 1 of 2
B401BH and B401BHA
Conventional Bases with Sounder
JCI-60130:A2
General
The System Sensor B401BH(A) Base with Sounder is used
with conventional 400 Series two-wire plug-in smoke detec-
tors. Refer to the associated control panel manual for more
information on detector heads.
NOTE: Only compatible UL/ULC-approved smoke detectors may
be used with the B401BH(A).
Features
• Sound output greater than 90 dBA measured in anechoic
room at 10 feet (3.048 m), 24 volts. 85 dBA minimum mea-
sured in a UL reverberant room.
• An alarm delay of approximately 10 seconds is built into
the B401BH(A). This delay is present whether the control
signal comes from the sensor or from reversing the exter-
nal power supply polarity.
Applications
The B401BH(A) base is intended for use with conventional
plug-in systems. See systems literature for maximum allow-
able number of units per loop.
Construction and Operation
The B401BH(A) requires an external 24 VDC supply with
reverse polarity capability. The connections of the external
supply (terminals 1 and 2) and the communication/initiating
loop (terminals 3, 4, and 5) are isolated in the B401BH(A) to
prevent electrical interaction between them.
NOTE: When not used as a supplementary evacuation system,
the external 24 VDC supply shall be treated as a component of the
main power supply system and shall fall under the requirements of
the main power supply system per NFPA 72.
When the detector head’s visible LEDs are latched ON for
approximately 10 seconds, the base horn sounds. A loop of
horns can be made to sound with the polarity reversal of the
external supply.
Installation
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.
Units must be mounted directly to a 4.0" (101.6 mm) square
electrical box, minimum 1.5" (38.1 mm) deep, using the sup-
plied mounting kit. A maximum space of 0.125" (3.175 mm)
from outside edge of electrical box to the inside edge of the
drywall or ceiling tile is allowable.
A flangeless plug-in base is used to attach detectors to the
B401BH(A) base with sounder.
Before installing detectors, please read Guide for Proper Use
of System Smoke Detectors, document number 156-407-00,
which provides detailed information on detector spacing,
placement, zoning, wiring, and special applications.
B601BH(A) TERMINALS:
1. External Supply Positive (+)
2. External Supply Negative (–)
3. Negative (–) V In
4. Positive (+) V In and V Out
5. Negative (–) V Out
NOTE: Terminals 3, 4, and 5 are used for the communication/initi-
ating circuit.
Specifications
Base diameter: 6.0" (152.4 mm).
Base height (less base & sensor): 0.75" (19.05 mm).
Weight: 0.3 lbs. (140 grams).
Operating temperature range: 14°F to 140°F (–10°C to
+60°C).
Operating humidity range: 10% to 95% relative humidity,
non condensing.
Sounder in UL reverberant room: 85 dBA minimum.
Sounder in anechoic room: > 90 dBA @ 10 feet (3 m), 24
volts.
Electrical Ratings
Wiring: Tw o - wi r e .
EXTERNAL SUPPLY:
Voltage: 17 to 32 VDC.
Standby current: 1.0 mA maximum.
Alarm current: 15 mA maximum.
Maximum ripple voltage: 10% of supply voltage.
Startup capacitance: 200 μF.
4786pho1.jpg
B401BH sounder assembly,
shown with a 2541 photo detector
