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3-2
Chapter 3. INSTALLATION & MOUNTING
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Noise generating sources and countermeasures
• Generally, the following generate electrical noise:
①
Relays and contacts
②
Solenoid coils, solenoid valves
③
Power lines (in particular, 90 Vac min.)
④
Induction loads
⑤
Inverters
⑥
Motor commutators
⑦
Phase angle control SCR
⑧
Radio communications equipment
⑨
Welding equipment
⑩
High-voltage ignition equipment
• If the influence of electrical noise cannot be eliminated, we recommend taking
the following countermeasures:
• Provision of a CR filter for fast-rising noise
Recommended CR filter: Yamatake Model No. 81446365-001
• Provision of a varistor for high wave height noise.
Recommended varistor:
Yamatake Model No. 81446366-001 (100 V)
81446367-001 (200 V)
Handling Precautions
The varistor may become short-circuited when trouble occurs. Pay
attention to this when providing a varistor on the DCP32.
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Dust-proof cover
Use the dust-proof cover when using the DCP32 in a dusty or dirty location, and
to prevent inadvertent operation.
Two dust proof-covers are provided, hard or soft, each with the following
differing functions.
Type
Confirmation on Display
Operation
Hard
«
X
Soft
«
«
«
indicates that a function can be used.