SilentKnight B224RB User Manual
INSTALLATION AND MAINTENANCE INSTRUCTIONS
I56-2815-000R
B224RB Plug-in
Relay Detector Base
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
Specifications
Base Diameter: 6.1 inches (155 mm)
Base Height: 1.2 inches (31 mm)
Mounting: 4-inch 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)
31⁄2-inch octagon box, Min. depth - 1.5 inches (38 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 32 VDC
Standby Current: 170 µA
Relay Characteristics
Coil: 2 coil latching
Contact Type: 1 Form C
Contact Relay Ratings
Relay Specification MAX Units Remarks
Switching 30 VDC max, coded 2 A Resistive load
Switching 30 VDC max, non-coded 3 A Resistive load
Switching 110 VDC max, non-coded 0.9 A Resistive load
Switching 125 VAC 0.9 A Resistive load
Switching 30 VDC max, coded 0.5 A Inductive load (L/R = 5ms)
Switching 30 VDC max, coded 1 A Inductive load (L/R = 2ms)
Switching 125 VAC max, non-coded 0.3 A Inductive load (PF = 0.35)
Switching 70.7 VAC max, non-coded 0.7 A Inductive load (PF = 0.35)
Switching 25 VAC max, non-coded 2 A Inductive load (PF = 0.35)
Set Time (Position 1): 60 msec minimum, 100 msec maximum
Set Time (Position 2): 6 seconds minimum, 10 seconds maximum
Reset Time: 20 msec
Before Installing
Please thoroughly read the system wiring and installation
manuals and the System Smoke Detectors Applications
Guide, which provide detailed information on detector
spacing, placement, zoning, and special applications.
NOTICE: This manual should be left with the owner/user
tion time for the long delay is 6 sec to 10 sec. A shunt with
pin headers, located on the base PC board, can be used to
choose your desired delay. B224RB is set at the short delay when manufactured. If you wish to use the long delay,
please move the shunt to the adjacent pair of pin headers.
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.
General Information
Form C latching relay contacts are included for the control of
an auxiliary function. The relay can operate in two differnt
modes (short and long delay). The activation time when the
short delay is used is 60 msec to 100 msec, while the activa-
D250-03-00 1 I56-2815-000R
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
WARNING
SCREWS (NOT
SUPPLIED)
BOX (NOT
SUPPLIED)
DETECTOR
BASE
SNAP ON
DECORATIVE
RING
All wiring must be installed in compliance with all appli
cable 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 (0.9 square mm). However, wire sizes up to
14 gauge (2.0 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, crimp
ing, 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:
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Wiring Instructions
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.
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,
C0148-00
or soldering to ensure a reliable connection. If shielded cable
is not used, leave terminal 6 in the screwed-down 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.
A label is affixed to the base for recording the zone, address, and type of detector being installed at the base location. This information is useful for setting the detector head
address and for verification of the sensor type required for
that location.
Once all detector bases have been wired and mounted, and
the loop wiring has been checked, the detector heads may
be installed in the bases.
D250-03-00 2 I56-2815-000R
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