System Sensor B524RB, B224RB, B224RBA, B524RBA User Manual
INSTALLATION AND MAINTENANCE INSTRUCTIONS
B524RB(A) and B224RB(A) Plug-in
Relay Detector Bases
For use with the following models:
B524RB: For use with any 500 Series detector
B224RB: For use with any 200 Series detector
Specifications
Base Diameter: 6.2 inches (157 mm)
Base Height
B224RB: 1.2 inches (31 mm)
B524RB: 1.4 inches (36 mm)
Mounting: 4-inch square box with or without plaster ring, Min Depth - 1.5 inches (13 mm)
4-inch octagon box, Min. depth - 1.5 inches (13 mm)
31/2-inch octagon box, Min. depth - 1.5 inches (13 mm)
Operating Temperature Range: 0° to 49°C (32° to 120°F)
Operating Humidity Range: 10% to 93% Relative Humidity (Non-condensing)
Electrical Ratings
Operating Voltage: 15 to 28 VDC
Time Averaged Standby Ratings: <500 µA @ 24 VDC
Relay Characteristics
Coil: 2 coil latching
Contact Type: 1 Form C
Contact Relay
Resistive: 2 A @ 30 VDC
Inductive: 0.3 A @ 110 VDC (with .35 PF or greater)
0.3 A @ 120 VAC (with .35 PF or greater)
1.0 A @ 30 VDC (with .6 PF or greater)
Set Time: 4 seconds minimum, 20 seconds maximum
Reset Time: 1 second minimum, 8 seconds maximum
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
A Division of Pittway
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 applications. Copies of these manuals are available at no charge
from System Sensor. (For installation in Canada, refer to
CAN/ULC-S524, Standard for the Installation for 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 these bases must be
tested and maintained regularly following NFPA 72 requirements. The detectors should be cleaned at least once a year.
D450-16-01 1 I56-659-06
General Information
Form C latching relay contacts are included for the control
of an auxiliary function. The relay operates 12 seconds
(nominally) after activation of the sensor head remote annunciator output.
Mounting
The detector base mounts directly to 31/2- and 4-inch octagon and 4-inch square boxes, with or without a plaster
ring.
To mount, remove the decorative ring by rotating 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 junction box and the appropriate slots in
the base. Replace the decorative ring on the base and rotate it in either direction until the ring snaps in place (see
Figure 1).
Installation Guidelines
All wiring must be installed in compliance with all applicable local codes and any special requirements of the local
authority having jurisdiction, using the proper wire sizes.
The conductors used to connect smoke detectors 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 detectors), it is recommended that the wire be no smaller
than 18 gauge (1.0 square mm). However, wire sizes up to
12 gauge (3.3 square mm) can be used with the base. The
use of twisted pair wiring or shielded cable for the power
(+ and -) loop is recommended to minimize the effects of
electrical interference.
If shielded cable is used, the shield connection to and from
the detector must be continuous by using wire nuts, crimping, or soldering, as appropriate, for a reliable connection.
Alarm system control panels have specifications for allowable loop resistance. Consult the control panel specifications for the total loop resistance allowed before wiring the
detector loops.
Figure 1. Mounting the base to an electrical box:
SNAP ON
DECORATIVE
RING
SCREWS (NOT
SUPPLIED)
DETECTOR
BASE
BOX (NOT
SUPPLIED)
Wiring Instructions
WARNING
The base uses a latching relay that can change states if it is
subjected to mechanical shocks or jarring. As a result, even
though relay contacts are in the open state when the base is
shipped from the factory, the contacts may have closed
during shipment.
Connecting an auxiliary control circuit to closed relay contacts can cause an unexpected, and possibly dangerous, activation of that circuit. Therefore, do NOT connect an
auxiliary control circuit to the relay contacts (terminals 1,
2, and 3) before ensuring that the relay contacts are in their
open state. Ensure that the contacts are open by applying
power to the bases WITHOUT the sensor heads installed.
Make wiring connections by stripping about 3/8" (10 mm)
of insulation from the end of the wire. Then, slide the wire
under the clamping plate and tighten the clamping plate
screw.
A78-1175-21
Wire the normally open (NO) line to terminal 2 (see Figure
2). Insert the normally closed (NC) line of the relay to terminal 1 and the relay common line to terminal 3. Wire the
communication lines in (+) and out (+)to terminal 4. Insert the communication line in (–) and out (–) to terminal
5. Terminal 6 is for shielded cable only (see Figure 2). If
shielded cable is used, the shield connection to and from
the detector must be continuous by using wire nuts,
crimping, or soldering to ensure a reliable connection. If
shielded cable is not used, leave terminal 6 in the screweddown position.
Check the zone wiring of all bases in the system before installing detector heads. This includes checking the wiring
for continuity, correct polarity, ground fault testing, and
performing a dielectric test.
D450-16-01 2 I56-659-06
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