YOKOGAWA ZR22S, User Manual

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<5. Wiring>
5-1
IM 11M13A01-02E
5. Wiring
In this Chapter, the wiring necessary for connection to the EXAxt ZR Separate type Explosion-
proof Zirconia Oxygen Analyzer is described.
5.1 General
CAUTION
• NEVER supply current to the converter or any other device constituting a power circuit in
combination with the converter, until all wiring is completed.
• This product complies with CE marking.
Where compliance with CE marking is necessary, the following wiring procedure is
necessary.
1. Install an external switch or circuit breaker to the power supply of the converter.
2. Use an external switch or circuit breaker rated 5 A and conforming with IEC 947-1 or IEC
947-3.
3. It is recommended that the external switch or circuit breaker be mounted in the same room
as the converter.
4. The external switch or circuit breaker should be installed within the reach of the operator,
and marked as the power supply switch of this equipment.
Wiring procedure
Wiring should be performed according to the following procedure:
1. Be sure to connect the shield line to FG terminal of the converter.
2. The outer sheath of the signal line should be stripped to a length of 50 mm or less.
The most outer sheath of the power cable should be stripped to a length of 20 mm or less.
3. Signals may be affected by noise if signal lines, power cable and heater cable are located in
the same conduit. When using conduit, signal lines should be installed in a separate conduit
from power and heater cables.
4. Install metal blind plug(s) in unused cable connection gland(s) of the converter.
5. Metal conduit should be grounded.
6. The following cables are used for wiring:
Table 5.1 Cable specifications
Terminal name of converter Name Need for shields Number of cores
CELL+, CELL-
HTR TC+, HTR TC-
CJ+, CJ-
Detector signal О 6
HEATER Detector heater 2
L, N Power supply 2 or 3 *
AO-1+, AO-1-, AO-2+, AO-2- Analog output О 2 or 4
DO-1, DO-2, DO-3, DO-4 Contact output 2 to 8
AC-Z, AC-S, AC-C Automatic calibration unit 3
DI-1, DI-2, DI-C Contact input 3
Note *: When the case is used for protective grounding, use a 2-wire cable.