System Sensor B406B User Manual
D450-05-00 1 I56-376-08R
B406B Plug-in Detector Base
For use with the following smoke detectors:
In US: 1451, 2451, 2451TH, 4451HT, 5451
In Canada: 1451A, 2451A, 2451THA, 4451HTA, 5451A
In Europe: 1451E, 2451E, 4451E, 5451E
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue
St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Before Installing
Please thoroughly read the System Sensor manual I56-407,
Guide for Proper Use of System Smoke Detectors, which provides detailed information on detector spacing, placement,
zoning, wiring, and special applications. Copies of this
manual are available at no charge from System Sensor. (For
installations in Canada, please refer to CAN4-S524,
Standard for the Installation of 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 this base must be
tested and maintained regularly following NFPA 72 require-
Specifications
Base Diameter: 6.2 inches (15.7 cm)
Base Height: 1.1 inches (2.9 cm)
Weight: 0.3 lb. (130 g)
Mounting: 4-inch square box with or without plaster ring. Min. Depth–1.5 inches
4-inch octagon box. Min. Depth–1.5 inches
31⁄2-inch octagon box. Min. Depth–1.5 inches
50 mm box; 60 mm box; 70 mm box
Operating Temperature Range: –10° to 60°C (14° to 140°F)
Note: Do not install in locations where normal ambient temperature
exceeds 50°C (120°F)
Operating Humidity Range: 10% to 93% Relative Humidity
Electrical Ratings – includes base and detector
System Voltage: 24 VDC
Maximum Ripple Voltage: 4 Volts peak to peak
Start-up Capacitance: 0.02µF Maximum
Standby Ratings: 15 VDC Minimum
35 VDC Maximum
120 µA Maximum
Alarm Ratings: 9 V Minimum at 18 mA
12 V Maximum at 100 mA
(Alarm current MUST be limited to 100 mA maximum by the control panel.)
Relay Contact Ratings:
Resistive or Inductive (60% power factor) Load
Form C*: 2.0A @ 30 VAC/DC
0.6A @ 110 VDC
1.0A @ 125 VAC
Reset Voltage: 1.4 VDC Minimum
Reset Time: 0.3 Seconds Maximum
Start-up Time: 34.0 Seconds Maximum
*For Canadian installations relay contact ratings are 2.0A @ 30 VAC/DC.
ments. The detector used with this base should be cleaned
at least once a year.
General Description
The B406B plug-in detector base is used with a variety of
System Sensor conventional detector heads. They are capable of accepting a variety of detector heads, which makes
them more versatile than equivalent direct-wired models.
Refer to the System Sensor catalog for other available plugin detector bases.
The B406B base is intended for use in 2-wire systems, with
screw terminals provided for power and relay contact connections. These bases MUST be current limited by the system control panel in the alarm state.
D450-05-00 2 I56-376-08R
Mounting
This detector base mounts directly to 31⁄2-inch and 4-inch
octagon boxes, and 4-inch square boxes (with or without
plaster rings). To mount, remove decorative ring by turning
it in either direction to unhook the snaps, then separate the
ring from the base. Install the base to the box using the
screws supplied with the junction box and the appropriate
mounting slots in the base. Place decorative ring onto base,
then turn in either direction until the ring snaps in place
(see Figure 1).
Installation Guidelines
All wiring must be installed in compliance with the
National Electrical Code and the local codes having jurisdiction. Proper wire gauges should be used. The conductors used to connect smoke detectors to control panels and
accessory devices should be color-coded to prevent wiring
mistakes. 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. Wire sizes up to 12 gauge may be used with
the base. For best system performance, the power (+) and
(–) loop wires should be twisted pair and installed in separate grounded conduit to protect the loop from extraneous
electrical interference.
Smoke detectors and alarm system control panels have
specifications for allowable loop resistance. Consult the
control panel manufacturer’s specifications for the total
loop resistance of the particular model control panel being
used before wiring the detector loops.
Wiring Instructions
For system supervision — For terminals 2, 3, and 5 do not
use looped wire under terminals. Break wire run to provide
system supervision of connections.
Wire connections are made by simply stripping insulation
from the end of the wire, sliding the bare end of the wire
under the clamping plate, and tightening the clamping
plate screw. Use the strip gauges molded into the inside
and underside of the base for ease of wiring to terminals 1
through 5, and to terminals 12 through 14, respectively.
System Sensor smoke detectors and mounting bases are
marked with a compatibility identifier located as the last
digit of a five digit code stamped on the back of the product. Connect detectors/mounting bases only to compatible
control units as indicated in System Sensor’s compatibility
chart which contains a current list of UL listed control units
CAUTION
Figure 1. Mounting base to box:
and detector head/base combinations. A copy of this list is
available from System Sensor upon request.
The zone wiring of the detector base should be checked
before the detector heads are installed in them. To make
this possible, this base contains a special spring-type shorting jumper. After a detector base is properly wired and
mounted on an electrical box, make sure that the jumper
spring is in contact with the base of Terminal 3. This temporary connection shorts the positive-in and positive-out
leads and permits the wiring of the loop to be checked for
continuity.
Once all the detector bases have been wired and mounted,
and the loop wiring has been checked, the detector heads
may be installed in the bases. The shorting spring in the
base will disengage automatically when the detector head
is removed from the base. DO NOT remove the shorting
spring since it reengages as the detector head is turned into
the base, completing the circuit.
A78-1175-01
SNAP ON
DECORATIVE
RING
SHORTING
SPRING
SCREWS (NOT
SUPPLIED)
DETECTOR
BASE
BOX (NOT
SUPPLIED)
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