20
Control circuit specifications
2.3 Control circuit specifications
2.3.1
Control circuit terminals
indicates that terminal functions can be selected using
Pr. 178 to Pr. 196 (I/O terminal function selection)
(Refer to chapter 4 of
the instruction manual (applied)
.)
(1) Input signals
Ty
p
e Terminal
Symbol
Terminal
Name
Description
Rated
Specifications
Refer to
page
Cont
act
inpu
t
STF
Forward
rotation start
Turn on the STF signal to start forward
rotation and turn it off to stop.
When the STF and STR
signals are turned on
simultaneously, the stop
command is given.
Input resistance
4.7k
Ω
Voltage at opening:
21 to 27VDC
Contacts at short-
circuited: 4 to
6mADC
STR
Reverse
rotation start
Turn on the STR signal to start reverse
rotation and turn it off to stop.
STOP
Start self-
holding
selection
Turn on the STOP signal to self-hold the start signal.
RH,
RM, RL
Multi-speed
selection
Multi-speed can be selected according to the combination of RH,
RM and RL signals.
JOG
Jog mode
selection
Turn on the JOG signal to select Jog operation (initial setting) and
turn on the start signal (STF or STR) to start Jog operation.
Pulse train
input
JOG terminal can be used as pulse train input terminal. To use as
pulse train input terminal, the
Pr. 291
setting needs to be changed.
(maximum input pulse: 100kpulses/s)
Input resistance
2k
Ω
Contacts at short-
circuited: 8 to
13mADC
RT
Second
function
selection
Turn on the RT signal to select second function.
When the second function such as "second torque boost" and
"second V/F (base frequency)" are set, turning on the RT signal
selects these functions.
Input resistance
4.7k
Ω
Voltage at opening:
21 to 27VDC
Contacts at short-
circuited: 4 to
6mADC
MRS
Output stop
Turn on the MRS signal (20ms or more) to stop the inverter output.
Use to shut off the inverter output when stopping the motor by
electromagnetic brake.
RES
Reset
Used to reset fault output provided when fault occurs.
Turn on the RES signal for more than 0.1s, then turn it off.
Initial setting is for reset always.
By setting
Pr. 75
, reset can be set
to enabled only at fault occurrence. Recover about 1s after reset
is cancelled.
AU
Terminal 4
input
selection
Terminal 4 is made valid only when the AU signal is turned on. (The
frequency setting signal can be set between 4 and 20mADC.)
Turning the AU signal on makes terminal 2 (voltage input) invalid.
PTC input
AU terminal is used as PTC input terminal (thermal protection of
the motor). When using it as PTC input terminal, set the AU/PTC
switch to PTC.
CS
Selection of
automatic
restart after
instantaneous
power failure
When the CS signal is left on, the inverter restarts automatically at
power restoration. Note that restart setting is necessary for this
operation. In the initial setting, a restart is disabled.
(Refer to Pr. 57 Restart coasting time in chapter 4 of
the
instruction manual (applied).)
SD
Contact input
common (sink)
(initial setting)
Common terminal for contact input terminal (sink logic) and terminal
FM.
--------------------
—
External
transistor
common
(source)
When connecting the transistor output (open collector output),
such as a programmable controller, when source logic is
selected, connect the external power supply common for
transistor output to this terminal to prevent a malfunction caused
by undesirable currents.
24VDC power
supply
common
Common output terminal for 24VDC 0.1A power supply (PC
terminal).
Isolated from terminals 5 and SE.
PC
External
transistor
common (sink)
(initial setting)
When connecting the transistor output (open collector output), such
as a programmable controller, when sink logic is selected, connect
the external power supply common for transistor output to this
terminal to prevent a malfunction caused by undesirable currents.
Power supply
voltage range 19.2
to 28.8VDC
Permissible load
current 100mA
Contact input
common
(source)
Common terminal for contact input terminal (source logic).
24VDC power
supply
Can be used as 24VDC 0.1A power supply.
Summary of Contents for FR-A741-11K
Page 7: ...MEMO ...
Page 216: ...209 MEMO ...
