YOKOGAWA ZO21DW, User Manual, Page: 23 / 39

<4. WIRING>
4-4
IM 11M03A02-00E
4.3 Wiring for Power to Detector Heater
This wiring provides electric power from the converter to the heater for heating the sensor in the
detector.
Basically, PVC insulated PVC sheathed control cables (2 cores) are used for this wiring.
Detector
ZR402G
Converter
HTR 7
HTR 8
HEATER
F4.3E.ai
Figure 4.3 Wiring for power to the detector heater
4.3.1 Connection to Detector
When connecting the cable to the detector, proceed as follows:
(1) Mount cable glands or conduits of the specified thread size to the wiring connections of the
detector.
The detector may need to be removed in future for maintenance, so be sure to allow
sufficient cable length.
(2) The size of the terminal screw threads is M3.5. Each cable should be terminated in the
corresponding size crimp-on terminals contact respectively.