System Sensor B401 User Manual

D450-08-00 1 I56-338-09R

B401 Plug-In Detector Base

INSTALLATION AND MAINTENANCE INSTRUCTIONS

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: [phone]

Before Installing

Please thoroughly read 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 from System Sensor.

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 require­ments. The detector used with this base should be cleaned
at least once a year.

Specifications

Base Diameter: 10.2 cm (4.0 inches)
Base Height: 2.0 cm (0.8 inches)
Weight: 152 g (0.34 lb.)
Mounting: 50 mm box

60 mm box

Operating Temperature Range: –10° to +60°C (14° to 140°F) — European Installation

0° to 49°C (32° to 120°F) — US/Australian Installation

Operating Humidity Range: 10% to 93% Relative Humidity

Electrical Ratings — includes base and detector

Base And Smoke Detector Base And Heat Detector

System Voltage: 12/24 VDC 24 VDC
Maximum Ripple Voltage: 4 Volts peak to peak 4 Volts peak to peak
Start-up Capacitance: 0.02 µF Maximum 0.02 µF Maximum
Standby Ratings:* 8.5 VDC Minimum 15 VDC Minimum

35 VDC Maximum 35 VDC Maximum
120 µA Maximum 100 µA Maximum

Alarm Ratings: 4.2 VDC Minimum at 10 mA** 4.2 VDC Minimum at 10 mA**

6.6 VDC Maximum at 100 mA** 6.6 VDC Maximum at 100 mA**
Reset Voltage: 2.5 VDC Minimum 2.5 VDC Minimum
Reset Time: 0.3 Seconds Maximum 0.3 Seconds Maximum
Start-up Time: 34 Seconds Maximum 34 Seconds Maximum
* 1151E: 30 µA Maximum.
** Alarm current MUST be limited to 100 mA maximum (130 mA for models 1151 and 2151) by the control panel.

If used, the RA400Z Remote Annunciator operates within the specified detector alarm currents.

General Description

This B401 plug-in detector base is used with System Sensor
smoke and heat detector heads. The capability of plugging
these detectors into a variety of special bases makes them
more versatile than equivalent direct-wired models. Refer
to the System Sensor catalog for other available plug-in
detector bases.

The B401 base is intended for use in 2-wire systems, with
screw terminals provided for power and remote annuncia­tor connections.

For use with the following detectors:
US Models: 1151, 1451, 2151, 2451, 2451TH, 5451
European Models: 1151E, 1451E, 2151E, 2451E, 5451E
Australian Models: 1151AUS, 1451AUS, 2151AUS, 2451AUS, 4451AUS

5451AUS, 51A51, 51B51, 51C51, 51D51

D450-08-00 2 I56-338-09R

A78-1468-01

Figure 1. Mounting base to box:

SHORTING
SPRING

Mounting

Figure 1 shows mechanical mounting details. These detec­tor bases mount to typical junction boxes. Attach the base
to the box using the screws supplied with the junction box.

Installation Guidelines

All wiring must be installed in compliance with applicable
codes and the authority 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 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. 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 allowed for the control panel being used
before wiring the detector loops.

Wiring Instructions

Do not loop wire under terminals. Break wire run to ensure
supervision of connections.

Wire connections are made by stripping about 3⁄8" of insu-
lation from the end of the wire (use strip gauge molded in
base), sliding the bare end of the wire under the clamping
plate, and tightening the clamping plate screw.

Tw o-wire initiating devices receive their power from the
initiating circuit of a control panel. Electrical specifications
of the control panel and the detector-base combination
must be compatible for the system to function properly.

System Sensor maintains a list of two-wire detectors and
control panels that are listed as compatible. The 2-Wire
Compatibility Chart is available from System Sensor at no
charge.

The zone wiring of the detector bases should be checked
before the detector heads are installed. To make this possi­ble, this base contains a special spring-type shorting
jumper (shown in Figure 1). After a detector base is prop-

CAUTION