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INSTALLATION AND MAINTENANCE INSTRUCTIONS
B501B Plug-in Detector Base
For use with UL Listed detectors:
1551, 2551, 2551T, and 5551
Specifications
Diameter:
Electrical Ratings
Voltage Range:
Standby Current (nominal):
Power-up Surge at Maximum
Rated Voltage:
LED Current (nominal):
Before Installing
Please thoroughly read the system wiring and installation
manual, 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-S22524-M86, Standard
for the Installation of Fire Alarm Systems and CEC part 1,
Section 32.)
General Description
This plug-in detector base is used with System Sensor
model 1551 ionization, 2551 and 2551T photoelectronic,
and 5551 thermal detectors.
The B501B base is intended for use in a 2-wire intelligent
system, with screw terminals provided for power (+) and
(-), and remote annunciator connections. Communication
takes place over the power (+) and (-) lines. (See note on
page 4).
D550-01-01
6.1 inches (15.5 cm)
4 inch square box with or without plaster ring; Min. Depth: 1.5 inches.
4 inch Octagon Box; Min. Depth: 1.5 inches.
3-1/2 inch Octagon Box; Min. Depth: 1.5 inches.
Single Gang Box; Min. Depth: 1.5 inches.
14.5 to 28 VDC peak
150 µA at 24 VDC
1.5 mA-second
6 mA at 24 VDC
1
3825 Ohio Avenue, St. Charles, Illinois 60174
Base Terminals
NO.
FUNCTION
1
POWER (-), REMOTE ANNUNCIATOR (-)
2
POWER (+)
3
Figure 1. Terminal Layout
BASE
TERMINALS
A Division of Pittway
1-800-SENSOR2, FAX: 630-377-6495
TAMPER PROOF
TAB
2
1
3
A78-1318-00
I56-310-03
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Summary of Contents for Pittway SYSTEM SENSOR B501B
- Page 1 INSTALLATION AND MAINTENANCE INSTRUCTIONS B501B Plug-in Detector Base A Division of Pittway For use with UL Listed detectors: 3825 Ohio Avenue, St. Charles, Illinois 60174 1551, 2551, 2551T, and 5551 1-800-SENSOR2, FAX: 630-377-6495 Specifications Diameter: 6.1 inches (15.5 cm) Mounting: 4 inch square box with or without plaster ring;...
- Page 2 Mounting Figure 2. Mounting base to box: 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 decora- tive ring by turning it in either direction to unhook the snaps, then separate the ring from the base.
- Page 3 Figure 3. Typical wiring diagram for 2-wire loop: REMOTE ANNUNCIATOR CAUTION: Do not loop wire under terminal 1 or 2. Break wire run to provide supervision of connections. CLASS A OPTIONAL WIRING A78-1253-00 Tamper-proof Feature This detector base also includes an optional tamper-proof NOTE: Head removal after the tamper-proof feature has feature that, when activated, prevents removal of the detec- been activated first requires removal of the decora-...
- Page 4 It is not acceptable to have three stripped wires under the Figure 5. Connection to remote annunciator terminal: same wiring terminal unless they are separated by a STRIPPED WIRE washer or equivalent means. The spade lug supplied with the remote annunciator is considered an equivalent means. See Figure 5 for proper installation.
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