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4.  The heat sensor operates as a programmable heat detector.
 

 NOTE: In panels where this feature is not available, the 5351B and 
5351B-IV will default to a 135°F fixed heat detector. 5351RB and 
5351RB-IV will default to a 135°F fixed heat detector and rate-of-rise. 
5351H and 5351H-IV will default to a 190°F high temperature heat 
detector.

Intelligent programmable temperature sensors require compatible addressable 
communications to function properly. Connect these sensors to listed-compat-
ible control panels only.

WIRING GUIDE

All wiring must be installed in compliance with the National Electrical Code, 
applicable local codes and the Authority Having Jurisdiction. Proper wire 
gauges should be used. The installation wires should be color coded to limit 
wiring mistakes and ease system troubleshooting. Improper connections will 
prevent a system from responding properly in the event of a fire.

Remove power from the communication line before installing sensors.

1.   Wire the sensor base (supplied separately) as shown in the wiring 

diagram. (See Figure 2.)

2.   Set the desired address on the rotary dial switches. (See Figure 1.)

3.   Install the sensor into the sensor base. Push the sensor into the base 

while turning it clockwise to secure it in place.

4.   After all sensors have been installed, apply power to the control unit and 

activate the communication line.

5.  Test the sensor(s) as described in the TESTING section of this manual.

FIGURE 2. WIRING DIAGRAM

2

3

1

2

3

3

1

2

1

(–)

(+)

+

-

UL Listed Compatib

le

Control P

anel

CAUTION: Do not loop wire under 

terminal 1 or 2.  Break wire run to 

supervise connections.

CLASS A OPTIONAL WIRING

Remote 

Annunciator

(–)
(+)

RA

+

+

RA

+

+

RA

+

+

 

C0129-10

SPECIFICATIONS

Operating Voltage Range: 

15 to 32 Volts DC Peak

Operating Current @ 24 VDC:  

200 uA (one communication every 5 seconds with green LED blink on communication)

Maximum Alarm Current:  

2 mA @ 24 VDC (one communication every 5 seconds with red LED solid on)

Maximum Current:  

4.5 mA @ 24 VDC (one communication every 5 seconds with amber LED solid on)

Operating Humidity Range: 

10% to 93% Relative Humidity, Non-condensing

Installation Temperature: 

Set for fixed-temperature or rate-of-rise (ROR): –4°F to 115°F (–20°C to 47°C)

 

Set for high-heat: –4°F to 150°F (–20°C to 66°C) 

Fixed Temperature Rating: 

135°F (57°C)

High Heat Temperature Rating:  

190°F (88°C) 

Rate-of Rise Detection: 

Responds to greater than 15°F/minute or 135°F (8.3°C/minute or 57°C) 

Height: 

2.0˝ (51 mm) installed in B300-6 Base

Diameter: 

6.2˝ (156 mm) installed in B300-6 Base

Weight: 

3.4 oz. (95 g)

UL 521 listed for Heat Detectors 

This sensor must be installed in compliance with the control panel system 
installation manual. The installation must meet the requirements of the Au-
thority Having Jurisdiction (AHJ). Sensors offer maximum performance when 
installed in compliance with the National Fire Protection Association (NFPA); 
see NFPA 72.

Before installing sensors, please read the system wiring and installation man-
ual thoroughly. This manual provides detailed information on sensor spac-
ing, placement, zoning, and special applications. Copies of these manuals are 
available from System Sensor.

GENERAL DESCRIPTION

Models 5351B, 5351B-IV, 5351RB, 5351RB-IV, 5351H, and 5351H-IV are field 
programmable intelligent sensors that use a state-of-the-art thermistor sensing 
circuit for fast response. These sensors are designed to provide open area pro-
tection with 50-foot spacing capability as approved by UL 521. The intelligent 
temperature sensor can be programmed as either a 135°F fixed temperature 
sensor, a rate of rise and 135°F fixed temperature sensor or a 190°F high tem-
perature sensor through the Fire Alarm Control Panel (FACP).

Two LEDs on each sensor light to provide a local, visible sensor indication. 
Remote LED annunciator capability is available as an optional accessory 
(Part No. RA100Z). Rotary dial switches are provided for setting the sensor's 
address. (See Figure 1.) 

FIGURE 1. ROTARY ADDRESS SWITCHES

 

TENS

ONES

9

10

11

12

13

14

15

8

7

6

5

4

3

2

1 0

9

8

7

6

5

4

3

2

1 0

  

C0162-00

System Sensor panels offer different feature sets across different models. As a 
result, certain features of the Intelligent Programmable Temperature Sensors 
may be available on some control panels, but not on others. Detectors support 
Advanced Protocol and CLIP (Classic Loop Interface Protocol) mode. The pos-
sible features available if supported by the control panel include:

1.   The sensor’s LEDs can operate in three ways—on, off, and blinking–and 

they can be set to red, green, or amber. This is controlled by the panel.  

2.   The remote output may be synchronized to the LED operation or con-

trolled independent of the LEDs. Please refer to the operation manual for 
the UL listed control unit for specific operation of these models

3.   Devices are point addressable up to 159 addresses.

I56-6545-00

1

INSTALLATION AND MAINTENANCE INSTRUCTIONS

5351B, 5351B-IV, 5351RB,  

5351RB-IV, 5351H, and 5351H-IV  

Intelligent Programmable Temperature Sensors

3825 Ohio Avenue, St. Charles, Illinois 60174

800/736-7672, FAX: 630/377-6495

www.systemsensor.com

  

I56-6545-001 

 

 11/09/2020

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