Wiring; General - YOKOGAWA ZR402G User Manual

5.

Wiring

This chapter describes wiring procedures necessary for the EXAxt ZR Integrated type Zirconia
Oxygen/Humidity Analyzer.
5.1

General

WARNING
NEVER supply current to the converter or any other device constituting a power circuit in
combination with the converter, until all wiring is completed.
CAUTION
This product complies with CE marking.
Where compliance with CE marking is necessary, the following wiring procedure is necessary.
• Install an external switch or circuit breaker to the power supply of the converter.
• Use an external switch or circuit breaker rated 5 A and conforming with IEC 947-1 or IEC
947-3.
• It is recommended that the external switch or circuit breaker be mounted in the same room
as the equipment.
• 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 made according to the following procedure:
1. Be sure to connect the shield of the shielded line to FG terminal of the analyzer.
2. The most outer sheath of the signal line and the power cable should be stripped off to the
minimum necessary length.
3. Signal will be affected by noise emission when the signal lines, power cable and heater
cable are located in the same conduit. When using a conduit, signal lines should be installed
in the separate conduit from power and heater cables. Be sure to ground the metal conduit.
4. Mount the attached two blind plugs to unused cable connection gland(s) of the equipment.
5. The cables indicated in Table 5.1 are used for wiring.
6. After completing the wiring, screw the cover in the terminal box body and secure it with a lock
screw.
Table 5.1
Terminal name of converter
L, N,
AO+, AO-
DO-1, DO-2
DI-1, DI-2, DI-C
Note *: When the case is used for protective grounding, use a 2-wire cable.
Cable Specifications
Name
Power supply
Analog output
Contact output
Contact input
Need for shields Number of wires
2 or 3 *
Ο
2 to 4
<5. Wiring>
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IM 11M12A01-04E 11th Edition : Jul. 19, 2017-00
5-1