< 5. Wiring >
5-7
IM 11M12D01-01E
5.2.4 Power Wiring to Detector Heaters
This wiring provides electric power from the averaging converter to the heater for heating the sensor
in a detector. Use 2-core shielded cables that withstand temperatures of at least 80°C. The wire size
should be 1.25 mm
2
(16 AWG) or larger and the conductor two-way resistance should be 10 Ω or less.
If a cable gland is not installed on the wiring hole of the averaging converter, use a wire with an outside
diameter of 17 mm or smaller. If installed, use a wire with an outside diameter of 6 to 12 mm. The
shields should be connected to cable shield ground terminals on the case of the averaging converter.
51 52 53 54 55 56 57 58
7 8
CH1 CH2 CH3 CH4
Shield
Averaging Converter
ZR22G / ZO21D
To Detector for CH2
To Detector for CH3
To Detector for CH4
Detector for CH1
Basic Power Unit
F5-7E.ai
Figure 5.7 Power Wiring to Detector Heaters
If the ambient temperature at the detector installation site exceeds 75°C, install a terminal box
and connect to the detector using 600 V silicon rubber insulated glass braided wires. The distance
between the detector and the terminal box should be minimized.
51 52 53 54 55 56 57 58
7 8
CH1 CH2 CH3 CH4
Shield
Averaging Converter
ZR22G / ZO21D
To Detector for CH2
To Detector for CH3
To Detector for CH4
Detector for CH1
Silicon Rubber Insulated Glass Braided Wire
Terminal Box
Basic Power Unit
F5-8E.ai
Figure 5.8 Power Wiring to Detector Heaters (Using Terminal Box)
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