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Mitsubishi Electric FR-D740-012SC-EC Installation Manuallines page 13

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WIRING
3) Insert the wire into a socket.
Note
 When using a stranded wire without a blade terminal, twist enough to avoid short circuit with a nearby terminals or
wires.
 Place the flathead screwdriver vertical to the open/close button. In case the blade tip slips, it may cause an inverter
damage or injury.
Wire removal
Pull the wire with pushing the open/close button all the
way down firmly with a flathead screwdriver.
Open/close button
(3) Wiring instructions
• Terminals PC, SE and 5 are common to the I/O signals. Do not earth (ground) them.
• It is recommended to use the cables of 0.3mm
• The maximum wiring length should be 30m .
• Do not short across terminals PC and SD. Inverter may be damaged.
• When using contact inputs, use two or more parallel micro-signal contacts or
twin contacts to prevent contact faults since the control circuit input signals are
micro-currents.
• To suppress EMI, use shielded or twisted cables for the control circuit terminals and run them away from the main and
power circuits (including the 200V relay sequence circuit). For the cables connected to the control circuit terminals, connect
their shields to the common terminal of the connected control circuit terminal. When connecting an external power supply to
terminal PC, however, connect the shield of the power supply cable to the negative side of the external power supply. Do
not directly earth (ground) the shield to the enclosure, etc.
• Always apply a voltage to the fault output terminals (A, B, C) via a relay coil, lamp, etc.
• When using an external power supply for transistor output, note the following points to prevent a malfunction caused by
undesirable current.
Do not connect a terminal SD on the inverter and the 0V terminal of the external power supply (when the sink logic is
selected).
Do not connect a terminal PC on the inverter and the +24V terminal of the external power supply (when the source logic is
selected).
Do not install an external power source in parallel with the internal 24VDC power source (connected to terminals PC and
SD) to use them together.
Refer to Chapter 2 of the Instruction Manual for the detail.
10
When using a single wire or stranded wire without a blade terminal, push an open/
close button all the way down with a flathead screw driver, and insert the wire.
Flathead screwdriver
2
2
to 0.75mm
gauge for connection to the control circuit terminals.
Open/close button
Note
 Pulling out the terminal block forcefully without pushing
the open/close button all the way down may damage the
terminal block.
 Use a small flathead screwdriver (Tip thickness: 0.4mm/
tip width: 2.5mm).
If a flathead screwdriver with a narrow tip is used,
terminal block may be damaged.
Introduced products (as of February 2016)
Product
Type
Flathead
SZF 0- 0,4 x 2,5 Phoenix Contact Co., Ltd.
screwdriver
 Place the flathead screwdriver vertical to the open/close
button. In case the blade tip slips, it may cause an
inverter damage or injury.
Micro signal contacts
Flathead screwdriver
Manufacturer
Twin contacts

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