Wiring Of The Contact Input Terminals - Mitsubishi Electric MELIPM Series Instruction Manual

3.3.3 Wiring of the contact input terminals

Use shielded or twisted shielded cables for wiring. Connect one shield sheath to
the common terminal. Leave the other shield sheath open.
When using contact signals
The following shows the wiring of the terminals STF, STR. The same wiring also
applies to the other terminals.
The terminal SD is a common terminal.
Drive unit
STF
STR
SD
When using non-contact switches
When using transistor outputs having an external power supply, such as a PLC,
to input signals, perform the following wiring to prevent a malfunction caused by
a sneak current from the external power supply.
The following shows the wiring of the terminals STF, STR. The same wiring also
applies to the other terminals.
The terminal PC is a common terminal.
PLC
1
2
9
10
External power supply
Do not apply voltages to the contact input terminals.
Do not short the terminals PC and SD. Doing so will damage the
unit.
NOTICE
When the terminal PC is used as a power supply terminal, the
wiring length should be within 30m.
R
R
DC24V
Drive unit
DC24V
STF
STR
PC
SD
3-10
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3. WIRING