D250-01-00
1
I56-595-03
B210LP Plug-in Detector Base
For use with the following models:
In US:
1251, 2251
In Canada:
1251A, 2251A
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Before Installing
Please thoroughly read the system wiring and installation
manuals, and manual I56-407,
Guide for Proper Use of Sys-
tem Smoke Detectors,
which provides detailed information
on detector spacing, placement, zoning, and special appli-
cations. Copies of these manuals are available from System
Sensor or through a System Sensor distributor. (For installa-
tion in Canada, refer to CAN/ULC-S524,
Standard for the
Installation of Fire Alarm Systems
and CEC Part 1, Sec. 32.)
General Description
The Plug-in Detector Base is used with System Sensor mod-
els 1251 and 1251A ionization and 2251 and 2251A photo-
electronic detectors.
The B210LP base is intended for use in a 2-wire intelli-
gent system, with screw terminals provided for power
(+ and –), and remote annunciator connections. Com-
munication takes place over the power (+ and –) lines.
Base Terminals
NO.
FUNCTION
1
Power (–), Remote Annunciator (–)
2
Power (+)
3
Remote Annunciator (+)
Mounting
This detector base mounts directly to 3-1/2 inch and 4 inch
octagon boxes, 4 inch square boxes (with or without plas-
ter rings) and single gang boxes. To mount, remove the
decorative ring by turning it in either direction to unhook
the snaps, then separate the ring from the base. Install the
base on the box using the screws supplied with the junc-
tion box and the appropriate mounting slots in the base.
3
2
1
BASE
TERMINALS
TAMPER PROOF
TAB
Specifications
Diameter:
6.1 inches (155 mm)
Mounting:
4 inch (102 mm) square box with or without plaster ring
Min. Depth: 1.5 inches (38 mm).
4 inch Octagon Box, Min. Depth - 1.5 inches (38 mm).
3-1/2 inch Octagon Box, Min. Depth - 1.5 inches (38 mm).
Single Gang Box, Min. Depth - 1.5 inches (38 mm).
Figure 1. Terminal layout:
A78-1318-00
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