YOKOGAWA ZR22S, User Manual

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<5. Wiring>
5-6
IM 11M13A01-02E
5.2.2 Connection to the Detector
To connect cables to the detector, proceed as follows:
(1) Mount conduits of the specified thread size or cable glands 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) If the ambient temperature at the location of wire installation is 75 to 150 ° C, be sure to use a
flexible metallic wire conduit. If a non-shielded “ 600 V silicon rubber insulated glass braided
wire “ is used, keep the wire away from noise sources to avoid noise interference.
(3) Figure 5.5 shows the layout of the detector terminals.
CELL +
TC +
TC -
TC CELL CJ
1 2 3 4 5 6
8 7
H T R
CELL
(+)
CELL
(-)
TC
(+)
TC
(-)
CJ
(+)
CJ
(-)
HTR HTR
F05-5E.ai
To converter,
or
terminal box
To ground
To converter,
or
terminal box
Figure 5.5 Detector terminals
The sizes of the terminal screw threads are M3.5 except for the M4 on grounding terminal.
Each wire in the cable should be terminated in the corresponding size of crimp terminal (*1)
respectively.
*1: If the surface temperature of the detector terminal box installation site exceeds 60 ° C, use a “ bare crimp-on terminal”.
(4) Except when “600 V silicon rubber insulated glass braided wire” is used, connect the cable
shield to the FG terminal of the converter.
5.2.3 Connection to the Converter
To connect the wiring to the converter, proceed as follows:
(1) M4 screws are used for the terminals of the converter. Each wire in the cable should be
terminated corresponding to crimp-on terminals.
(2) When a rubber insulated glass braided wire is used for wiring to the detector, use a terminal
box. For wiring between the terminal box and the converter, basically use a cable that
withstand temperatures of at least 80°C, rather than individual wires.
NOTE
The above is to prevent moisture or corrosive gas from entering the converter and to ground the
detector without fail.