Part No.

Description

4451HT

Fixed temperature thermal detector with alarm

point at 190°F (88°C). Must be mounted to

one of the B40X Series bases listed above

(order separately).

Part No.

Description

4451HTA

Same as above, Canadian model

RA400Z

Remote Annunciator for 2- or 4-wire systems, 3–32V.

Use with most 400 Series plug-in detector bases. Fits

standard U.S. single gang electrical box.

SMK400

Surface Mounting Kit. Provides for entry of surface

wiring conduit. Use with B401 or B401R mounting

bases only.

© 2004 System Sensor. The company reserves the right to change product specifications without notice.

A05-0236-004•6/04•#883

Operating Voltage

Mounting base dependent

(see chart below)

Standby Current

100 microamps

Weight

5 ounces (150 g)

Dimensions

Diameter: 4.1 inches (104 mm)

Height:

2.1 inches (53 mm)

Construction

Flame retardant noryl plastic

Operating Temperature

32° to 150°F (0° to 66°C)

Humidity Range

10% to 93% RH noncondensing

Alarm Point

190°F (88° C)

Wiring

12 to 18 gauge, twisted pair recommended

Smoke Detector Spacing

For detectors on smooth ceilings (as defined in

NFPA 72), spacing of 50 feet (2500 sq. ft.) may

be used. Other spacing may be used depending on

ceiling height, high air movements, and other condi-

tions or response requirements.

Specifications

Base Model No.

Loop Type

Current Limit Resistor

Alarm Contact Type

Nominal Voltage

Current Draw on Alarm (mA)

B401B

2-wire*

No

—

10–100**

B401BR

2-wire*

Yes

—

22–62

B402B

4-wire

Yes

Form A & C

24 VDC

14–39

B404B

4-wire

Yes

Form A & C – Supy.

120 VAC

75 mA AC Max.

B406B

2-wire*

No

Form C

24 VDC

12–100**

2-wire*

No

—

10–100**

2-wire*

Yes

—

18–62

*Functionality contingent on panel compatibility.

**Must be limited by control panel.

†Flangeless base

‡Although B401B and B401 bases are capable of 12/24 VDC operation, they cannot be used with the 4451HT in 12V applications.

Relay Contact Ratings:

Resistive or Inductive (60% power factor) load.

Form A:

2.0A at 30VAC/DC

Form C:

0.6A at 110VDC, 2.0A at 30VDC

1.0A at 125VAC, 2.0A at 30VAC

Mounting Base Selection Guide

(+)

(+)

(–)

(–)

1

2

4

3

5

13

14

12

11

10

9

8

RED (+)

(–)

PURPLE

ALARM CIRCUIT

(+)

(–)

1

2

4

3

5

13

14

12

11

10

9

8

RA400Z

(OPTIONAL)

AUXILIARY

CONTACTS

COM

N.C.

N.O.

AUXILIARY

CONTACTS

COM

N.C.

N.O.

BLK

RA400Z

(OPTIONAL)

1

2

3

4

(+)

(–)

(–)

(+)

(–)

1

2

3

4

(–)

(+)

(+)

EOL

RESISTOR

(+)

(–)

(–)

(+)

(–)

OPTIONAL

OPTIONAL

RA400Z

RA400Z

OPTIONAL FAULT TOLERANT WIRING

(+)

(–)

1

2

4

3

5

13

14

12

11

10

9

8

7

6

ALARM

CONTROL

PANEL

(+)

(–)

1

2

4

3

5

13

14

12

11

10

9

8

7

6

120 VAC

120 VAC

EOL

RESISTOR

RA400Z

(OPTIONAL)

AUXILIARY

FORM C

CONTACTS

COM

N.C.

N.O.

AUXILIARY

FORM C

CONTACTS

COM

N.C.

N.O.

RA400Z

(OPTIONAL)

SUPERVISION CIRCUIT

ALARM CIRCUIT

EOL

RESISTOR

(+)

(–)

1

2

3

4

5

14

13

12

OPTIONAL NFPA CLASS “A” WIRING

1

2

3

5

14

13

12

4

AUXILIARY

CONTACTS

COM

N.C.

N.O.

AUXILIARY

CONTACTS

COM

N.C.

N.O.

B401B Wiring Diagram

B402B Wiring Diagram

B404B Wiring Diagram

B406B Wiring Diagram

Wiring Guide

Ordering Information

System Sensor Sales and Service

System Sensor Headquarters

3825 Ohio Avenue

St. Charles, IL 60174

Ph: 800/SENSOR2

Fx: 630/377-6495

www.systemsensor.com

System Sensor Canada

Ph: 905.812.0767

Fx: 905.812.0771

System Sensor Europe

Ph: 44.1403.276500

Fx: 44.1403.276501

System Sensor in China

Ph: 86.29.8832.0119

Fx: 86.29.8832.5110

System Sensor in Singapore

Ph: 65.273.2230

Fx: 65.273.2610

System Sensor – Far East

Ph: 85.22.191.9003

Fx: 85.22.736.6580

System Sensor – Australia

Ph: 613.54.281.142

Fx: 613.54.281.172

System Sensor – India

Ph: 91.124.637.1770 x.2700

Fx: 91.124.637.3118

System Sensor – Russia

Ph: 70.95.937.7982

Fx: 70.95.937.7983