Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 90)

IM 11M13A01-02E 5-11
5. Wiring
5.5 Power and Grounding Wiring
This wiring supplies power to the converter and grounds the converter/detector.
Converter
Jumper plate
L N G
Detector
Ground
100 - 240VAC
50/60Hz
Grounding to the ground terminal
on the converter case
Converter case
FG terminal
Lock washer
Crimp-on terminal of
the ground wire
F5.9E.EPS
ZR402G ZR22S
Figure 5.9 Power and Grounding wiring
5.5.1 Power Wiring
Connect the power wiring to the L and N terminals of the converter. Proceed as follows:
(1) Use a 2-core or a 3-core shielded cable.
(2) The size of converter terminal screw threads is M4. Each cable should be terminated
corresponding crimp-on terminals.
5.5.2 Grounding Wiring
The ground wiring of the detector should be connected to the ground terminal of the
detector case. The ground wiring of the converter should be connected to either the
ground terminal of the converter case or the protective ground terminal in the equip-
ment. The grounding terminals of the detector are of size of M4 (inside) and M5
(outside), and the grounding terminals of the converter are of size M4. Proceed as
follows:
(1) Keep ground resistance to 100
⍀ or less.
(2) When the ambient temperature of the wiring installation is 80 to 150
Њ C for the wiring
of the detector, use wiring material with sufficient heat resistance.
(3) When connecting the ground wiring to the ground terminal of the converter case, be
sure that the lock washer is in contact with the case surface (see Figure 5.9).
(4) Ensure that the jumper plate is connected between the G terminal and the protective
ground terminal of the converter.