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Control Circuit Specifications - Mitsubishi Electric FR-E700 Instruction Manual

Frequency inverter.
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Control circuit specifications

3.4
Control circuit specifications
The functions of the terminals highlighted in grey can be adjusted with parameters 178 – 184 "In-
put terminal function assignment" (refer to section 6.10). The listed settings show the default
configuration as shipped, which you can restore by resetting to the factory defaults.
Input signals
Terminal
RH, RM, RL
Tab. 3-9: Input signals (1)
3 - 14
Name
Forward rotation
STF
start
Reverse rotation
STR
start
Multi-speed
selection
MRS
Output stop
RES
Reset
Contact input com-
mon (sink)
SD
24V DC power
supply common
24V DC
power supply,
PC
contact input
common
(source)
Description
Turn on the STF signal to
start forward rotation and
turn it off to stop.
Turn on the STR signal to
start reverse rotation and
turn it off to stop.
Multi-speed can be selected according to the
combination of RH, RM and RL signals.
Turn on the MRS signal (20ms or more) to stop
the inverter output.
Use to shut off the inverter output when stop-
ping the motor by electromagnetic brake.
Used to reset alarm output provided when pro-
tective function is activated.
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 an
inverter alarm occurrence. Recover about 1s
after reset is cancelled.
A determined control function is activated, if
the corresponding terminal is connected to the
terminal SD (sink logic). The SD terminal is
isolated from the digital circuits via opto cou-
plers.
The terminal is isolated from the reference
potential of the analog circuit (terminal 5).
24V DC/0.1A output
With negative logic and control via open col-
lector transistors (e.g. a PLC) the positive pole
of an external power source must be con-
nected to the PC terminal. With positive logic
the PC terminal is used as a common refer-
ence for the control inputs. This means that
when positive logic is selected (default setting
of the EC units) the corresponding control
function is activated by connecting its terminal
to the PC terminal.
Rated
Specifications
When the STF
and STR signals
are turned on
simultaneously,
the stop com-
mand is given.
Input resist-
ance: 4.7kΩ
Voltage at
opening:
21V to 26V DC
Contacts at
short-circuited:
4 to 6mA DC
Power supply
voltage range:
22 V to
26,5 V DC
Permissible
load current:
100 mA
Wiring
Refer to
6-114
3-20

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Fr-e720sFr-e740

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