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Control Circuit
1.7 Control Circuit
1.7.1 Description of the control circuit terminals
Symbol
Terminal
Name
Description
Rating
Specifications
Input signals
Contact input
STF
Forward
rotation
start
Turn on the STF signal
to start forward rotation
and turn it off to stop.
A stop
command is
given if STF
and STR
signals turn
on at the
same time.
The terminal
functions
change with
input terminal
function
selection (Pr.
60 to Pr. 63,
Pr. 65, Pr.
505). (*3)
Input resistance
4.7kΩ
Open-time
voltage
21 to 27VDC
Short-time
current
4 to 6mADC
Controlled by
open collector
output or 0V
contact signal
STR
Reverse
rotation
start
Turn on the STR signal
to start reverse rotation
and turn it off to stop.
RH
RM
RL
Multi-
speed
selection
You can select multiple speeds (three
speeds).
SQ
Sequence
start
Turn on the SQ signal to execute the
built-in PLC function. (RUN state of
the PLC) Turn off the SQ signal to stop
the built-in PLC function. (STOP state
of the PLC)
SD
(*1)
Contact
input
common
(sink)
Common terminal for contact inputs (terminals STF,
STR, RH, RM, RL, SQ).
Isolated from terminal SE.
—
PC
(*1)
External
transistor
common
24VDC
power
supply
Contact
input
common
(source)
When connecting the transistor output (open collector
output) of a programmable controller (PLC), etc.,
connect the positive external power supply for
transistor output to this terminal to prevent a
malfunction due to undesirable current.
It can be used as a 24V 0.1A DC power output across
PC-SD terminals.
Acts as the common terminal of the contact input
signals when source logic is selected.
Voltage range
18 to 26VDC
Permissible load
current
0.1A
Output signals
Open collector
ALM
Alarm
output
Low when the inverter protective
function is activated and High when
the inverter is not in error. (*2)
The terminal
functions
change with
output
terminal
function
selection (Pr.
64, Pr. 506).
(*4)
Permissible load
24VDC 0.1A
RUN
Inverter
running
Low when the inverter output
frequency is the starting frequency or
higher (factory-set to 0.5Hz and
changeable), and High during stop or
DC injection brake operation. (*2)
Permissible load
24VDC 0.1A
SE
Open
collector
common
Common terminal for inverter running terminal RUN.
Isolated from terminal SD.
—