Models Available

B224RB Relay Base

B524RB Relay Base

B224BI Isolator Base

B524BI Isolator Base

Intelligent

Relay and Isolator

Bases

© System Sensor 4/97

This document is not intended to be used for installation purposes.

A05-235-01

A Division of Pittway

3825 Ohio Avenue, St. Charles, IL 60174

1-800-SENSOR2 (736-7672), Fax 630-377-6495

http://www.systemsensor.com

APPROVED

Features

• Easy plug-in of detector heads to bases

• Terminal block wiring

• Rugged industrial construction

• Designed for direct surface or electrical box mounting

• Relay bases provide:

–Form C contact for control of auxiliary functions

–Activation from the sensor head to remote

annunciator output

–Suitability for patient room annunciation, elevator

recall, and pilot duty on fan shutdown and damper

control

• Isolator bases provide:

–Isolation of short circuit

–Automatic restore when short circuit is corrected

–Suitability for NFPA 72, Style 7 applications

The System Sensor

intelligent relay and isolator bases

are designed for use with 200 and 500 Series plug-in

detectors. The complete line of relay and isolator bases is

designed for reduced installation costs and optimum

performance.

Specifications

Diameter:

6.2″ (157 mm)

Height

B224RB/BI:

1.2″ (31 mm)

B524RB/BI:

1.4″ (36 mm)

Weight:

5.76 oz.

Mounting:

4″ square box with or without

octagonal box, min. depth 1.5″

(13 mm)

Wiring Gauge:

12–22 AWG, twisted pair

recommended

Operating

Temperature Range:

32° F to 120° F (0° C to 49° C)

Operating

Humidity Range:

10% to 93% relative humidity

(noncondensing)