Notifier 5451 User Manual

January 19, 1995 DN-4760  I-306

5451 Thermal Detector

135° Fixed-Temperature

and Rate-of-Rise

Section: Conventional Initiating Devices

GENERAL

The System Sensor 5451 plug-in rate-of-rise with fixed heat
detector contains a unique dual thermistor sensing circuit
to provide both maximum performance and solid state re­liability. Additional features include a recess mounting op­tion, various mounting bases, and a full line of accesso­ries.

The 5451 thermal detector is specifically designed to meet
the stringent performance requirements of industrial and
commercial fire detection/alarm systems. The design of
these detectors emphasizes ease of installation and field
maintenance.

FEATURES

 Dual solid-state thermistor sensors.
 Fixed heat with rate-of-rise response (57.2°C/135°F alarm

point).

 Rate-of-rise feature activates when the ambient temper-

ature increases at a rate greater than 15°F (9.4°C) per

minute.
 Exceptional stability and reliability.
 Thermistor technology.
 Restorable.
 Two visible LEDs blink in standby and latch on in alarm.
 Sealed against back pressure.
 Three year warranty.
 Built-in test switch.
 Low standby current.
 Built-in tamper-resistant feature.
 Designed for electrical box mounting.
 360° field viewing angle of the visual alarm LEDs.
 Easy plug-in of the head to base.
 SEMS screws for easy wiring.
 Optional recess mounting kit (flangeless bases only).
 UL listed for 50 ft. spacing.

APPLICATIONS

The 5451 135° Fixed Temperature and Rate-of-Rise Ther­mal Detector is ideal for areas in which a smoke detector
is not practical. Independent studies show that heat de­tectors should be used when property protection alone is
involved.

SPECIFICATIONS

Operating voltage: mounting base dependent (see chart
on page 2).

Weight: 0.6 lb. (277 g).
Size: 2" (52 mm) high, 4" (102 mm) diameter; 6.2" (158

mm) diameter with flanged bases.

California

MEA

167-93-E

S2101

Construction: flame-retardant white plastic.
Temperature: 32°F to 100°F (0°C to 37.8°C).
Humidity range: 10% to 93% RH non-condensing.
Agency listings: UL (listed for 50 ft. spacing).

State Fire
Marshal

7270-1209:105

ELECTRICAL RATINGS

Voltage range: 15 to 35 VDC.
Ripple voltage: 4 Vpp.
Maximum standby current: 100µA.
Input capacitance: 0.02µF.
Reset voltage: 2.50 V.
Reset time: 0.03 to 0.30 seconds.
Power-up time: 1 second maximum.

ORDERING INFORMATION

5451 Fixed heat detector with rate-of-rise. Alarm

point at 57°C (135°F). Must be mounted to
one of the 400 Series bases listed on page 2
(order separately).

RA400Z Remote annunciator for 2- or 4-wire systems,

3  32 V. Use with any 400 Series plug-in
detector. Fits standard U.S. single-gang elec­trical box.

RMK400 Recessed mounting kit. Use with any 400

Series plug-in detector. Recesses detector
by 0.8".

This document is not intended to be used for installation purposes. We try to keep our
product information up-to-date and accurate. We cannot cover all specific applications or
anticipate all requirements. All specifications are subject to change without notice.
For more information, contact NOTIFIER. Phone: [phone] FAX: [phone]

12 Clintonville Road, Northford, Connecticut 06472

DN-4760  01/19/95  Page 1 of 2

MOUNTING BASE SELECTION GUIDE

Base Model Loop Current Alarm Nominal Current Draw

Number Type Limit Resistor Contact Type Voltage on Alarm (mA)

B401B 2-wire No  24 VDC 10100**
B402B 4-wire Yes Form A&C 24 VDC 1439
B404B 4-wire Yes Form A&C + A Supv. 120 VAC 75 mA AC max.
B406B 2-wire No Form C 24 VDC 12100**



B401

**Must be limited by control panel. Flangeless base. Although B401B and B401 bases are capable of 12/24VDC operation,
they cannot be used with the 5451 in 12V applications. Relay Contact Ratings: Resistive or Inductive (60% power factor) load.
Form A: 2.0 A @ 30 VAC/DC. Form C: 0.6 A @ 110 VDC; 2.0 A @ 30 VDC. 1.0 A @ 125 VAC; 2.0 A @ 30 VAC.

(–)

(–)

OPTIONAL OPTIONAL

(–)

2

(+)

1

(+) (+)

OPTIONAL FAULT TOLERANT WIRING

2-wire No  24 VDC 10100**

(–)

(–)

RA400ZRA400Z

3

4

(+)

(+)

(–)

(–)

2

3

1

4

(+)

EOL
RESISTOR

WIRING DIAGRAMS

For B401B

(+)

(–)

RA400Z RA400Z

(+)

(–)

4

3

2

5

14

1

8

COM

13

N.C.

12

N.O.

11

10

9

AUXILIARY
CONTACTS

ALARM CIRCUIT

120 VAC 120 VAC

BLACK

BLACK

(–)

RA400Z RA400Z

(+)

ALARM
CONTROL
PANEL

3

2

4

1

14

COM

5

13

N.C.

12

6

7

8

N.O.

11

10

9

(–)

OPTIONALOPTIONAL

(+)

AUXILIARY
FORM C
CONTACTS

RED (+)

(–)

4

3

2

5

1

9

8

BLACK

(–)

OPTIONALOPTIONAL

(+)

BLK

14

COM

13

N.C.

12

N.O.

11

10

BLACK

3

2

4

1

14

5

13

12

6

11

10

7

9

8

AUXILIARY
CONTACTS

COM

N.C.

N.O.

PURPLE

PURPLE

AUXILIARY
FORM C
CONTACTS

EOL POWER

SUPERVISION

RELAY, A77-716

EOL
RESISTOR

EOL

RESISTOR

For B402B

For B404B

(+)

4

3

2

5

1

14

COM

N.O.

N.C.

AUXILIARY
CONTACTS

13

12

(–)

OPTIONAL FAULT TOLERANT WIRING

Page 2 of 2  DN-4760  01/19/95

EOL
RESISTOR

4

3

2

5

1

14

COM

N.O.

N.C.

AUXILIARY
CONTACTS

For B406B

13

12