Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 84)

IM 11M13A01-02E 5-5
5. Wiring
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
⍀ of loop resistance or less. Keep detector wiring away from power wiring.
Separate signal and power wiring.
CAUTION
Be sure to read Section 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's terminal box: exceeding 80 ؇ C
Heat-resistant wiring
Terminal box
(1) Surface temperature of the detector's terminal box: 80 ؇ C or less
F5.4E.EPS
Non-hazardous area
Hazardous area
Hazardous area
Figure 5.4 Wiring for detector output
Note
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.