8
●
Current transformer input cannot be used for 3-phase motors and phase control.
●
Devices and systems to be connected to this unit must have the basic insulation sufficient to
withstand the maximum operating voltage levels of the power supply and input/output parts.
●
Use power supply with reinforced insulation for DC model.
■
How to connect open collector output to external switch inputs
Chapter 4 WIRING
Symbol
Description
~
Alternating current
Direct current
Earth (ground) terminal
CAUTION, risk of electric shock
CAUTION
■
Noise Countermeasures
●
Use power from a single-phase control power supply to reduce noise.
●
Install an insulating transformer when power line noise is excessive and use a line
filter.
(model number of Yamatake Corporation line filter: 81446364-001)
●
Use a CR filter to counteract fast-rising noise.
(model number of Yamatake Corporation filter: 81446365-001)
Handling Precautions
●
When noise countermeasures have been taken, do not bundle primary and
secondary cables together or route them through the same distribution box or
ducts.
■
Meanings of Symbols in the Terminal Wiring Label
The following table shows the meanings of symbols in the terminal wiring label on the
instrument top.
15
In the case of a non-insulated type
external switch input
SDC10
14
13
15
In the case of an insulated type
external switch input
SDC10
12/24Vdc
14
13
