YOKOGAWA ZR22S, User Manual

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<5. Wiring>
5-5
IM 11M13A01-02E
5.2 Wiring for Detector Output
This wiring enables the converter to receive cell output from the detector, output from a
thermocouple and a reference junction compensation signal. Install wires that allow for 10 Ω of
loop resistance or less. Keep detector wiring away from power wiring.
CAUTION
Be sure to read Subsection 3.1.2 to 3.1.5 where the important information on writing is provided.
CELL(+)
CELL(+)
CELL(-)
CELL(-)
TC(+) TC(+)
TC(-)
TC(-)
CJ(+)
CJ(+)
CJ(-)
CJ(-)
FG
Shielded cables
Shielded cables
Detector Converter
Non-hazardous area
CELL(+)
CELL(+)
CELL(-) CELL(-)
TC(+) TC(+)
TC(-)
TC(-)
CJ(+) CJ(+)
CJ(-) CJ(-)
FG
Detector Converter
(2) Surface temperature of the detector terminal box: exceeding 75°C
Heat-resistant wiring
Terminal box
(1) Surface temperature of the detector terminal box: 75°C or less
F05-4E.ai
Non-hazardous area
Hazardous area
Hazardous area
Figure 5.4 Wiring for detector output
CAUTION
If shielded cables cannot be used between the detector and the terminal box, for example,
when heat-resistant wiring is used, locate the detector and the terminal box as close together as
possible.
5.2.1 Cable Specifications
During operation of the process, the terminal box may get quite hot and may reach temperatures
of up to 150
°
C. The cable may be exposed to even higher temperatures, so be sure to use
suitably heat-resistant cable.
Basically, a cable (six core) that withstand temperatures of at least 80
°
C is used for this wiring.
When the ambient temperature of the detector exceeds 75 ° C, install a terminal box, and connect
with the detector using six-piece 600V silicon rubber insulated glass braided wire.