Det-Tronics PIR9400 PointWatch Infrared Hydrocarbon Gas Detector - Manual (Page 13)

11 95-8440 9.3
The use of shielded cable in conduit or shielded
armored cable is recommended for optimum RFI/
EMI protection. In applications where the wiring cable
is installed in conduit, the conduit must not be used
for wiring to other electrical equipment. To assure
proper operation of the detector, the resistance of the
connecting wire must be within the specified limits. The
maximum distance between the detector and power
source is determined by the power supply capability
and wire size. See Figure
2 to determine the proper
wire size and maximum wiring distance allowed.
It is important that moisture not be allowed to come in
contact with the electrical connections of the system.
The use of proper piping techniques, breathers, glands,
and seals are required to prevent water ingress and/or
maintain the explosion-proof rating.
DETECTOR WIRING PROCEDURE
iMPoRtant
Do not apply power until the wiring procedure is
complete and has been verified.
1. Determine the best mounting location for the detector
(refer to the “Detector Location” section above). If it
is determined that sensor separation is required, see
the following section for details.
2. The termination box should be electrically connected
to earth ground.
3. Figures 15 through 20 show typical wiring for various
system configurations using the Model PIR 9400
Detector. Refer to the appropriate figure as a guide
to system connection. Figure
15 shows typical wiring
for stand alone operation. Figure 16 shows typical
wiring for the PIR 9400 with Det-Tronics supplied
termination box. Figure 17 shows the termination box
terminals and calibration switch. Figure 18 shows
wiring for PIR 9400 /FlexVu UD 10 operation. Figure
19 shows typical wiring for PIR 9400 /Infiniti U 9500
Transmitter operation. Figure 20 shows a PIR 9400
wired to a DCU in an Eagle Quantum Premier system.
The PIR
9400 wiring color code is:
Red lead = +24 Vdc
Black lead = – (common)
White lead = 4–20 mA signal output
Yellow lead* = Calibration input
Green lead = Chassis ground.
* If the calibration wire (yellow lead) is not being
used, do not connect this wire to ground. Trim
excess length and insulate wire so no shorting
can occur.
4. Check the detector wiring to ensure proper
connections, then pour the conduit seals and allow
them to dry (if conduit is being used).
Figure 15—Typical PIR9400 Detector Wiring, Stand Alone
Configuration
–
RED
BLACK
WHITE
YELLOW
GREEN
4 TO 20 MILLIAMPERES POINTWATCH DETECTOR
+
A1755
NOTE:
CALIBRATION PUSHBUTT0N, CURRENT METER AND POWER SUPPLY ARE NOT SUPPLIED.
+ 24 VDC
POWER SUPPLY –
+
CALIBRATE
Figure 16—Typical PIR9400 Wiring,
PIR9400 with PIRTB
+ 24 VDC POWER OUT
4 TO 20 MILLIAMPERES IN
POINTWATCH
DETECTOR
DET-TRONICS TERMINATION BOX
–
+
A1756
GREEN
YELLOW
WHITE
BLACK
RED SPARE
CAL
4 – 20
RET
+ 24
CHASSIS
CAL
4 – 20
RET
+ 24
Figure 17—PIRTB Terminals and Calibration Switch
CALIBRATE SWITCH
B2056
HOLD CALIBRATION MAGNET
AT OUTSIDE BASE OF JUNCTION
BOX AT THIS LOCATION
TO ACTIVATE CALIBRATION SWITCH
REMOTE LED