D250-04-00
4
I56-2813-002R
©2007 System Sensor
System Sensor warrants its enclosed smoke detector base to be free from defects in mate-
rials and workmanship under normal use and service for a period of three years from date
of manufacture. System Sensor makes no other express warranty for this smoke detector
base. No agent, representative, dealer, or employee of the Company has the authority to
increase or alter the obligations or limitations of this Warranty. The Company’s obligation
of this Warranty shall be limited to the repair or replacement of any part of the smoke
detector base which is found to be defective in materials or workmanship under normal
use and service during the three year period commencing with the date of manufacture.
After phoning System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return
Authorization number, send defective units postage prepaid to: System Sensor, Returns
D250-04-00
1
I56-2813-002R
B501BH-2
Sounder Base
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 sensor spacing. place-
ment, zoning, wiring. and special applications. Copies of this
manual are available from System Sensor. NFPA 72 and NEMA
guidelines should be observed.
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 should be cleaned at least once a year.
General Description
The B501BH-2 sounder base is used with System Sensor 200
Series sensor heads. Refer to the appropriate manual for more
information on sensors.
The sounder base is intended for use with intelligent systems.
Refer to the panel manual for the maximum allowable num-
ber of units per loop. The sounder base requires an external
24VDC supply with reverse polarity capability or a relay mod-
ule configured to reverse the power as in
Figure 5
. The con-
nections for the external supply (terminals 1 and 2) and the
communication loop (terminals 3 and 4) are isolated to pre-
vent electrical interaction between them.
A loop of horns can be made to sound by reversing the polar-
ity of the external supply when configured as in
Figure 4
and
5
. When configured as in
Figure 5
, a loop of horns can also be
made to sound by turning on the Intelligent Relay Module.
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 require-
ments of the main power supply system per NFPA 72.
Specifications
Base Diameter:
6.0 inches (15.2 cm)
Base Height (less sensor):
2.3 inches (5.9 cm)
Weight:
0.32 lb. (145 gm)
Operating Temperature Range:
32° to 120°F (0° to 49°C)
Operating Humidity Range:
10% to 93% Relative Humidity
Electrical Ratings
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
Start-up Capacitance:
200 µF
Communication/Initiating Loop Supply
Current Draw from Remote Output
of Sensor to turn on Horn:
600 µA maximum
Sound Output:
Greater than 90 dBA measured in anechoic room at 10 feet, 24 volts. 85 dBA
minimum measured in UL reverberant room.
Sounder Delay Time:
0.75 to 5.7 sec
B501BH-2 Terminals
No. Function
1 External Supply Positive (+)
2 External Supply Negative (–)
3 Negative (–) Comm. Line In and Out
4 Positive (+) Comm. Line In and Out
5 Sounder Base Interconnect
Terminals 3 and 4 are used for the communication circuit.
Mounting
Mount the B501BH-2 directly to an electrical box, using the
mounting kit, supplied (see
Figure 2
).
The sounder base is 1.1-inches deep. Electrical boxes must be
4-inches square by at least 1
1
⁄
2
inches deep - 2
1
⁄
8
inches is rec-
ommended.
NOTE:
A maximum space of
1
⁄
8
inch from the outside edge of
the electrical box to the inside edge of the drywall or ceiling
tile is allowable.
Wiring Guidelines
All wiring must be installed in compliance with the National
Electrical Code and the local codes having jurisdiction and
must not be of such length or wire size which would cause
the base to operate outside of its published specifications. The
conductors used to connect smoke sensors 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.
For signal wiring (the wiring between interconnected sensors
or modules), it is recommended that the wire be no smaller
than 18 gauge (1.0 square mm). Wire sizes up to 12 gauge (2.5
square mm) may be used with the base. For best system per-
formance, the power (+ and –) wires and the communication
THREE-YEAR LIMITED WARRANTY
Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please include a
note describing the malfunction and suspected cause of failure. The Company shall not
be obligated to repair or replace units which are found to be defective because of damage,
unreasonable use, modifications, or alterations occurring after the date of manufacture.
In no case shall the Company be liable for any consequential or incidental damages for
breach of this or any other Warranty, expressed or implied whatsoever, even if the loss
or damage is caused by the Company’s negligence or fault. Some states do not allow the
exclusion or limitation of incidental or consequential damages, so the above limitation
or exclusion may not apply to you. This Warranty gives you specific legal rights, and you
may also have other rights which vary from state to state.
Please refer to insert for the Limitations of Fire Alarm Systems
I56-28
13-00
2R
