JC-400-005
1
I56-3573-001R
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.
GENERAL DESCRIPTION
Model 2951JR is an intelligent sensor that combine a state-of-the-art photoelec-
tronic sensing chamber with communications.
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. RA400Z). The sensor will support either FlashScan™ or CLIP (Classic Loop
Interface Protocol) SLC communication mode.
Johnson Controls panels offer different feature sets across different models.
As a result, certain features of the 2951JR may be available on some control
panels, but not on others. The possible features available in the 2951JR, if sup-
ported by the control unit are:
1. The panel controls the LED operation on the sensor. Operational modes are
RED blink, RED continuous, GREEN blink, GREEN continuous, and off.
2. The remote output may be synchronized to the LED operation or con-
trolled independent of the LEDs.
When 2951JR is used in duct applications with a DNR/DNRW, testing can be
done remotely using approved System Sensor test accessories, eliminating the
need for a test coil.
NOTE: Only System Sensor approved accessories may be used with the 2951JR.
The 2951JR requires compatible addressable communications to function
properly. Connect the 2951JR sensor to listed-compatible control panels only.
SPACING
Johnson Controls recommends spacing sensors in compliance with NFPA 72.
In low air flow applications with smooth ceilings, space sensors 30 feet apart.
For specific information regarding sensor spacing, placement, and special ap-
plications, refer to NFPA 72 or the System Smoke Detector Application Guide,
(A05-103-XX) available from Johnson Controls.
Duct Applications: 2951JR is listed for use in ducts. See Duct Applications
Guide A05-1004 for details on pendant mount applications.
WIRING INSTRUCTIONS
All wiring must be installed in compliance with the National Electrical Code,
applicable local codes, and any special requirements of 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. Im-
proper connections will prevent a system from responding properly in the
event of a fire.
Disconnect power from the SLC communication line before installing sensors.
1. Wire the sensor base (supplied separately) per the wiring diagram, Figure 1.
2. Set the desired SLC address on the sensor address switches.
3. Install the sensor into the sensor base. Push the sensor into the base
while turning it clockwise to secure it in place.
I56-3573-00
1R
INSTALLATION AND MAINTENANCE INSTRUCTIONS
2951JR Intelligent Photoelectric
Smoke Sensor with Remote Test
Capability in Duct Applications
SPECIFICATIONS
Operating Voltage Range:
15 to 32 VDC
Standby Current:
300µA @ 24 VDC (one communication every 5 seconds with LED blink enabled)
Maximum Alarm Current (LED on):
6.5 mA @ 24 VDC
Operating Humidity Range:
10% to 93% Relative Humidity, Non-condensing
Operating Temperature Range:
32°F to 120°F (0°C to 49°C) 2951JR, -4°F to 158°F (-20°C to 70°C) 2951JR in duct applications
Height:
2.0˝ (51 mm) installed in B210LPJ and B501J Bases
Diameter:
6.1˝ (155 mm) installed in B210LPJ Base; 4.1˝ (104 mm) installed in B501J Base
Weight:
5.2 oz. (147 gm)
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 1. WIRING DIAGRAM:
3
2
1
3
2
1
+
-
-
+
+
-
REMOTE
ANNUNCIATOR
UL
LISTED COM
P
A
TIBLE
CONTROL
P
ANEL
OPTIONAL RETURN LOOP
DO NOT LOOP WIRE
UNDER TERMINAL 1 OR 2.
BREAK WIRE RUN TO
PROVIDE SUPERVISION
OF CONNECTION.
C0147-00
Note: Only System Sensor approved accessories may be used with the 2951JR.
FIGURE 2. ROTARy SLC 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
CAUTION
Dust covers provide limited protection against airborne dust particles during
shipping. Dust covers must be removed before the sensors can sense smoke.
Remove sensors prior to heavy remodeling or construction.
TAMPER-RESISTANCE
Model 2951JR includes a tamper-resistant capability that prevents its removal
from the bracket without the use of a tool. Refer to the base manual for details
on making use of this capability.
TESTING
Before testing, notify the proper authorities that the system is undergoing
maintenance, and will temporarily be out of service. Disable the system to
prevent unwanted alarms.
All sensors must be tested after installation and periodically thereafter. Test-
ing methods must satisfy the Authority Having Jurisdiction (AHJ). Sensors
offer maximum performance when tested and maintained in compliance with
NFPA 72. The sensor can be tested in the following ways:
507 E. Michigan Street
Milwaukee, WI 53201
Phone: 414.524.4000
