D150-03-00

1

I56-597-03R

B112LP Plug-in Detector Base

For use with the following smoke detectors:

IN US:

1151, 2151

IN CANADA:

1151A, 2151A

IN EUROPE:

1151E, 2151E

INSTALLATION AND MAINTENANCE INSTRUCTIONS

3825 Ohio Avenue

St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

Before Installing

Please thoroughly read the System Sensor manual I56-407,

Guide for Proper Use of System Smoke Detectors, which pro-

vides detailed information on detector spacing, placement,

zoning, wiring, and special applications. Copies of this

manual are available at no charge from System Sensor. (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 this base must be

tested and maintained regularly following NFPA 72 require-

ments. The detector used with this base should be cleaned

at least once a year.

Specifications

Base Diameter:

6.2 inches (157 mm)

Base Height:

0.95 inches (24 mm)

Weight:

0.3 lb. (137 g)

Mounting:

4-inch square box with or without plaster ring. Min. depth–1.5 inches

3-1/2-inch octagon box. Min. depth–1.5 inches

Operating Temperature Range:

0° to 49°C (32° to 120°F)

Operating Humidity Range:

10% to 93% Relative Humidity, Noncondensing

Electrical Ratings - includes base and detector

System Voltage:

24 VDC

Maximum Ripple Voltage:

4 Volts peak-to-peak

Start-Up Capacitance:

0.02µF Maximum

Standby Ratings:

20 VDC Minimum

29 VDC Maximum

120 µA Maximum

Alarm Ratings:

17 mA Minimum

36 mA Maximum

Reset Voltage:

1.4 VDC Minimum

Reset Time:

0.3 Seconds Maximum

(The optional RA400Z operates within specified detector alarm currents.)

Start-up Time:

34.0 Seconds Maximum

Relay Contact Ratings:

Resistive or Inductive (60% Power Factor)

Form A:

2.0 A @ 30 VAC/DC

Form C:

2.0 A @ 30 VAC/DC

0.6 A @ 110 VDC

1.0 A @ 125 VAC

General Description

The Model B112LP detector base is designed for use with

System Sensor model 2151 photoelectronic and 1151 ioniza-

tion detector heads. This four-wire base is equipped with

screw terminals for the connection of power, ground, and

an optional remote annunciator.

Mounting

The detector base mounts directly to 3-1/2 inch and 4-inch

octagon boxes and 4-inch square boxes, with or without

plaster rings. To mount the base, remove the decorative

ring by rotating it in either direction to unhook the snaps

before separating the ring from the base. Use the screws

supplied with the junction box to attach the base to the box

through the appropriate slots in the base (see Figure 1).

Position the decorative ring around the base and rotate it in

either direction until the ring snaps into place.