D450-04-00
1
I56-375-04R
B404B Plug-in Detector Base
For use with 1451, 2451, AND 2451TH detectors
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
. This man-
ual provides detailed information on detector spacing,
placement, zoning, wiring, and special applications, and is
available at no charge from System Sensor. (For installation
in Canada, refer to CAN/ULC-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-
ments. The detector should be cleaned at least once a year.
Specifications
Base Diameter:
6.2 inches (15.7 cm)
Base Height:
0.95 inches (2.9cm)
Weight:
0.6 lb. (260 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
3
1
⁄
2
-inch octagon box. Min. depth–1.5 inches
Operating Temperature Range:
0° to 49°C (32° to 120°F)
Operating Humidity Range:
10% to 93% Relative Humidity
Electrical Ratings - includes base and detector
System Voltage:
120 VAC, 60 Hz
Relay Contact Ratings
Resistive or Inductive (60% power factor) load
Form A:
2.0A @ 30VAC/DC
Form C:
2.0A @ 30VAC/DC
0.6A @ 110VDC
1.0A @ 125VAC
(If used, the RA400 Remote Lamp operates within the specified detector system voltage.)
Start-up Time:
36.0 Seconds maximum
(After 60 second reset)
General Description
The B404B detector base is designed for use with System
Sensor model 2451 and 2451TH photoelectronic and 1451
ionization 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 bases.
The B404B base is intended for use in 4-wire systems with
terminals provided for power, remote annunicator, and
relay connections. This base also contains a resistor to pro-
vide current limiting in the alarm state.
