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 require­ments. 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 man­ual 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 sys­tems. Refer to the panel manual for the maximum allow­able 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 iso­lated to prevent electrical interaction between them.

When the sensor’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 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 11⁄2 inches deep - 21⁄8 inches
is recommended.

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 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 interfer­ence.

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: