System Sensor B224RB User manual
D450-16-01 1 I56-659-09R
B224RB Plug-in
Relay Detector Base
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com
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
of this equipment.
IMPORTANT: The detector used with these bases must be
tested and maintained regularly following NFPA 72 require-
ments. The detectors should be cleaned at least once a year.
General Information
Form C latching relay contacts are included for the control
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
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
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 octa-
gon 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 sup-
plied 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).
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D450-16-01 2 I56-659-09R
Installation Guidelines
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 connec-
tions 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 allow-
able loop resistance. Consult the control panel specifica-
tions for the total loop resistance allowed before wiring the
detector loops.
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 con-
tacts 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.
WARNING
SCREWS (NOT
SUPPLIED)
BOX (NOT
SUPPLIED)
DETECTOR
BASE
SNAP ON
DECORATIVE
RING
Figure 1. Mounting the base to an electrical box:
C0148-00
Wire the normally open (NO) line to terminal 2 (see Figure
2). Insert the normally closed (NC) line of the relay to ter-
minal 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 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.
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D450-16-01 3 I56-659-09R
C0149-00
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
Figure 2. Wiring diagram:
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.
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 pre-
vents 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 counter-
clockwise for removal.
NOTE: Head removal after the tamper-resist feature has
been activated first requires removal of the decora-
tive 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.
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D450-16-01 4 I56-659-09R
©2002 System Sensor
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, representa-
tive, dealer, or employee of the Company has the authority to increase or
alter the obligations or limitations of this Warranty. The Company’s obli-
gation of this Warranty shall be limited to the repair or replacement of any
part of the smoke detector base which is found to be defective in materi-
als or workmanship under normal use and service during the three year
period commencing 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 postage prepaid to: System
Sensor, Repair 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 repair or
replace units which are found to be defective because of damage, unrea-
sonable use, modifications, or alterations occurring after the date of man-
ufacture. 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 exclusion 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.
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:
C0144-00
Figure 3B. Removing the detector head from the
base:
Please refer to insert for the Limitations of Fire Alarm Systems
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