System Sensor B501BH User manual

D650-03-00 1 I56-491-06R
B501BH Sounder Base
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
www.systemsensor.com
Before Installing
Please read the System Smoke Detector Application Guide,
which provides detailed information on sensor spacing.
placement, 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 require-
ments. The detector should be cleaned at least once a year.
General Description
The B501BH sounder base is used with System Sensor 200
and 500 Series sensor heads. Refer to the appropriate man-
ual for more information on sensors.
Specifications
Base Diameter: 6.0 inches (15.2 cm)
Base Height (less sensor): 2.3 inches (5.9 cm)
Weight: 0.4 lb. (181 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: 700 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.
The sounder base is intended for use with intelligent sys-
tems. Refer to the panel manual for the maximum allow-
able number of units per loop. The sounder base requires
an external 24VDC supply with reverse polarity capability.
The connections for the external supply (terminals 1 and 2)
and the communication loop (terminals 3 and 4) are iso-
lated to prevent electrical interaction between them.
When the sensor’s visible LEDs are latched on for approx-
imately 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 not used as a supplementary evacuation sys-
tem, 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.

D650-03-00 2 I56-491-06R
B501BH 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 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 11⁄2inches deep - 21⁄8inches
is recommended.
NOTE: A maximum space of 1⁄8inch from the outside edge
of the electrical box to the inside edge of the dry-
wall or ceiling tile is allowable.
Wiring Guidelines
All wiring must be installed in compliance with the
National Electrical Code and the local codes having juris-
diction 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 sen-
sors to control panels and accessory devices should be
color coded to reduce the likelihood of wiring errors.
Improper connections can prevent a system from respond-
ing properly in the event of a fire.
For signal wiring (the wiring between interconnected sen-
sors 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 performance, the power (+ and –) wires and
the communication circuit wires should be twisted pair or
shielded cable installed in separate grounded conduit to
protect the communication loop from electrical interfer-
ence.
Make wire connections by stripping about 3⁄8" of 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. Do NOT loop the wire under the clamping
plate (See Figure 3).
The zone wiring of the sensor base should be checked
before the sensor heads are installed. Check the wiring for
continuity and polarity in the base.
See the individual sensor manual for the maximum sensor
installation temperature.
Figure 1. Terminal layout:
Figure 2. Mounting:
MOUNT B501BH
TO ELECTRICAL BOX
4 INCH SQUARE BOX
A78-1993-02
Figure 3:

D650-03-00 3 I56-491-06R
Figure 4. Wiring diagram:
Horn Grouping
UL has approved horn grouping for up to six B501BH base
with horn units. When wired as a group, any detector in
the group that has its LED’s latched on by the panel will
cause other B501BH units in the group to sound. Grouping
is accomplished by wiring the grouped devices together
using terminal 5, Sounder Base Interconnect, as shown in
INTELLIGENT
MONITOR
MODULE
(+) 2
(–) 167
U.L.
LISTED
EOL
RESISTOR
47K
U.L.
LISTED
EOL
RELAY
24V
54
12
3
54
12
3
54
12
3
(+) COMM.
(–) COMM.
(–) POWER
(+) POWER
U.L. LISTED COMPATIBLE
CONTROL PANEL
EXTERNAL
24V SUPPLY
CLASS A OPTIONAL WIRING
CLASS A OPTIONAL WIRING
A78-1990-01
*GROUPING OF UP TO 6 MODEL B501BHT TEMPORAL TONE SOUNDER BASES.
OPTIONAL SOUNDER INTERCONNECT*
Wiring Instructions
NOTE: External supply shown in normal standby configu-
ration in Figure 4.
The wiring diagram for a typical 2-wire intelligent system
is shown in Figure 4 (the monitor module is supervising
the external supply).
Testing
NOTE: Before testing, notify the proper authorities that
the smoke sensor system is undergoing mainte-
nance and, therefore, will be temporarily out of
service. Disable the system undergoing mainte-
nance to prevent unwanted alarms.
Sensors and bases must be tested after installation and as
an integral part of periodic maintenance. Test the B501BH
as follows:
1. Reverse the polarity of the external 24VDC supply. All
B501BH bases on the loop should sound in approximate-
ly 10 seconds.
2. Latch the sensor LED on from the control panel. That
unit’s B501BH should sound in approximately 10 seconds.
NOTES:
1. There is approximately a 10 second delay built into the
B501BH before sounding. This delay is present whether
the control signal comes from the sensor or from the
external power supply polarity being reversed.
2. During automatic testing cycles. the horn may sound if
the associated sensor is left in the test mode with LEDs
latched on for more than 4 seconds. Therefore, it is nec-
essary to complete testing of each sensor within this 4-
second limit to prevent the horn from sounding.
the diagram. Since the grouping is not supervised, the
groups can only be used for supplementary signaling.
NOTE: Grouping horns together can only be used as a sup-
plementary evacuation system. It is not acceptable to group
horns for primary alarm signaling.

D650-03-00 4 I56-491-06R
©2002 System Sensor
Three-Year Limited Warranty
System Sensor warrants its enclosed smoke detector base to be free from
defects in materials 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, representa-
tive, dealer, or employee of the Company has the authority to increase or
alter the obligations or limitations of this Warranty. The Company’s obli-
gation 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 materi-
als 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 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, unrea-
sonable use, modifications, or alterations occurring after the date of man-
ufacture. 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