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
www.systemsensor.com
Before Installing
Please read thoroughly System Sensor’s
Applications Guide
for System Smoke Detectors (
SPAG91), which provides
detailed information on detector spacing, placement,
zoning, wiring, and special applications. This manual is
available online at www.systemsensor.com. (For installa-
tion 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.
I56-597-04R
1
I56-597-04R
06-10
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