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: [phone]

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

LISTED COMPATIBLE CONTROL PANEL

CLASS A OPTIONAL WIRING

3 RELAY COMMON
1 NORMALLY CLOSED
2 NORMALLY OPEN

TWISTED PAIR RECOMMENDED

(+)

(–)

(+)

(–)

1

(N.C.)

2

(N.O.)

3

(COMMON)

4

(+)

5

(–)

6

(S)

OTHER INTELLIGENT

DEVICES

•

LONG DELAY

•

SHORT DELAY

•

Figure 2. Wiring diagram:

Tamper-resist Feature

NOTE: Do not use the tamper-resist feature if the removal
tool is to be used.

This detector base includes a tamper-resist feature that pre­vents its removal from the base without the use of a tool.

To activate this feature, break the tab from the detector base as
shown in Figure 3A (see page 4). Then, install the detector.

To remove the detector from the base once the tamper-re­sist feature has been activated, insert a small-bladed screw­driver into the slot in the side of the base and push the
plastic lever away from the detector head (see Figure 3B,
page 4). This allows the detector to be rotated counter­clockwise for removal.

C0890-00

NOTE: Head removal after the tamper-resist feature has
been activated first requires removal of the decorative ring.

The tamper-resist feature can be defeated by breaking and
removing the plastic lever from the base. However, this pre­vents the feature from being used again.

D250-03-00 3 I56-2815-000R

PLASTIC LEVER

BREAK TAB AT
DOTTED LINE BY
TWISTING TOWARD
CENTER OF BASE.

USE SMALL-BLADED
SCREWDRIVER TO
PUSH PLASTIC LEVER
IN DIRECTION OF
ARROW.

Figure 3A. Activating the tamper-resist feature:

Figure 3B. Removing the detector head from the base:

C0144-00

Please refer to insert for the Limitations of Fire Alarm Systems

Three-Year Limited Warranty

System Sensor warrants its enclosed smoke detector base to be free from defects in
materials and workmanship under normal use and service for a period of three years
from date of manufacture. System Sensor makes no other express warranty for this
smoke detector base. No agent, representative, dealer, or employee of the Company
has the authority to increase or alter the obligations or limitations of this Warranty.
The Company’s obligation of this Warranty shall be limited to the replacement of
any part of the smoke detector base which is found to be defective in materials or
workmanship under normal use and service during the three year period commenc
ing with the date of manufacture. After phoning System Sensor’s toll free number
800-SENSOR2 (736-7672) for a Return Authorization number, send defective units

D250-03-00 4 I56-2815-000R
©2005 System Sensor

postage prepaid to: System Sensor, Returns Department, RA #__________, 3825 Ohio
Avenue, St. Charles, IL 60174. Please include a note describing the malfunction and
suspected cause of failure. The Company shall not be obligated to replace units
which are found to be defective because of damage, unreasonable use, modifica
tions, or alterations occurring after the date of manufacture. In no case shall the
Company be liable for any consequential or incidental damages for breach of this or
any other Warranty, expressed or implied whatsoever, even if the loss or damage is
caused by the Company’s negligence or fault. Some states do not allow the exclu

­sion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you. This Warranty gives you specific legal rights, and
you may also have other rights which vary from state to state.

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