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Wiring method
Removal and reinstallation precautions
Precautions to be taken when removing or reinstalling the control circuit terminals are shown below. Observe the following
precautions and handle the inverter properly to avoid malfunctions or failures.
• Remove or reinstall the connection cable connector so that it is parallel with the control circuit terminal connector of the
inverter. If the cable connector is not parallel with the terminal connector, it cannot be removed or reinstalled.
• Before removing the connection cable, remove the circuit board from the inverter.
Inverter's control
circuit connector
Inverter's control
circuit connector
Common terminals of the control circuit (SD, PC, 5, SE)
• Terminals SD (sink logic), PC (source logic), 5, and SE are common terminals (0 V) for I/O signals. (All common terminals
are isolated from each other.) Do not earth (ground) these terminals. Avoid connecting terminal SD (sink logic) with
terminal 5, terminal PC (source logic) with terminal 5, and terminal SE with terminal 5.
• In the sink logic, terminal SD is a common terminal for the contact input terminals (STF, STR, RH, RM, RL). The open
collector circuit is isolated from the internal control circuit by photocoupler.
• In the source logic, terminal PC is a common terminal for the contact input terminals (STF, STR, RH, RM, RL). The open
collector circuit is isolated from the internal control circuit by photocoupler.
• Terminal 5 is a common terminal for the frequency setting terminal (2) and the analog output terminals (AM). It should be
protected from external noise.
• Terminal SE is a common terminal for the open collector output terminal (RUN). The contact input circuit is isolated from
the internal control circuit by photocoupler.
Signal inputs by contactless switches
The contact input terminals of the inverter (STF, STR, RH, RM, RL) can be controlled using a transistor instead of a contact
switch. Refer to
page 53
for the connection diagram.
Connection cable
connector
Connection cable
connector
1
2
3
4
5
6
7
8
9
10
55
2. Installation and Wiring
2.6 Control circuit
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