Det-Tronics Eagle Quantum 95-8470-05, Инструкция по эксплуатации

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95-8470 VII-23
EQ2200DCU DIGITAL COMMUNICATION UNIT USED
WITH POINTWATCH
Determine the best mounting locations for the detectors.
Whenever practical, detectors should be placed where
they are easily accessible for calibration.
WARNING
Do not apply power to the system with the cover
removed unless the area has been verified to be
free of combustible gases and vapors.
The DCU utilizes the following:
1. A terminal wiring board mounted at the bottom of
the junction box.
2. A communication module mounted above the
terminal wiring board using the standoffs provided.
See Figure VII-33.
Assembly and Wiring Procedure
Attach the PointWatch to the DCU enclosure. Do not
over-tighten. If a sensor separation kit is being used,
attach the sensor to the separation kit junction box and
wire the device as described in the “Sensor Separation”
section.
Refer to the PointWatch instruction manual (form
number 95-8440) for complete installation and
application information.
Refer to Figure VII-36 when wiring a PointWatch IR gas
detector and a DCU. The wiring code for PointWatch is:
Red = + (24 vdc)
Black = – (common)
White = 4 to 20 ma signal
Yellow = Calibration input
Green = Chassis ground
Set the address for the device. Refer to “Device
Address Switch Setting” in the “Switch Setting” section
of this manual for complete information regarding the
switch setting procedure.
T0020A
Wire Size Maximum Wiring Distance
(AWG) Feet Meters
18 5700 1750
16 9000 2800
Table VII–8—
Maximum Separation Distances — Electrochemical Sensor to DCU
1
2
3
4
5
6
7
8
9
10
BLACK
RED
GREEN
DCU H2S/TOXIC/O2
14
13
12
11
–
–
+
+
24 VDC
POINTWATCH CALIBRATE
4 TO 20 MA IN
–
+
A
B
A
B
SENSOR POWER
COM 2
COM SHIELD
COM 1
A1875
Figure VII–35—Electrochemical Sensor Connected to DCU
1
2
3
4
5
6
7
8
9
10
14
13
12
11
–
–
+
+
24 VDC
POINTWATCH CALIBRATE
4 TO 20 MA IN
–
+
A
B
A
B
SENSOR POWER
COM 2
COM SHIELD
COM 1
A1726
Figure VII–34—Wiring Configuration for DCU