Instruction manual

5.0 WIRING SM425 INSTRUCTION MANUAL
5.0 WIRING
This section describes the wiring necessary for the SM425 Separate-type Zirconia Oxygen Analyzer.
5.1 General
- 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 5A 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
1. Wiring should be performed according to the following procedure:
2. Be sure to connect the shield line to the “FG” terminal of the converter. The outer sheath of the
signal line should be stripped to a length of 50 mm or less. The 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 conduit separate 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:
42500001 REV A 81