Control Circuit Terminals - Mitsubishi Electric FR-A700 Installation Manuallines

WIRING
(3) Total wiring length (FR-A720/A740)
The overall wiring length for connection of a single motor or multiple motors should be within the value in the table below.
(The wiring length should be 100m maximum for vector control.)
Pr. 72 PWM frequency selection setting
(carrier frequency) *
2 (2kH) or less
3 (3kHz), 4 (4kHz)
5 (5kHz) to 9 (9kHz)
10 (10kHz) or more
When driving a 400V class motor by the inverter, surge voltages attributable to the wiring constants may occur at the
motor terminals, deteriorating the insulation of the motor.
Take the following measures 1) or 2) in this case.
1) Use a "400V class inverter-driven insulation-enhanced motor".
2) Connect the surge voltage suppression filter (FR-ASF-H) to the 01800 or less and the sine wave filter (MT-BSL/
BSC) to the 02160 or more on the inverter output side.
CAUTION
· Especially for long-distance wiring, the inverter may be affected by a charging current caused by the stray capacitances of the wiring,
leading to a malfunction of the overcurrent protective function or fast response current limit function or a malfunction or fault of the
equipment connected on the inverter output side. If fast response current limit function malfunctions, disable this function. (For Pr. 156
Stall prevention operation selection, refer to
· For details of Pr. 72 PWM frequency selection , refer to
the 02160 or more, set "25" (2.5kHz) in Pr. 72.)
For explanation of surge voltage suppression filter (FR-ASF-H) and sine wave filter (MT-BSL/BSC), refer to the manual of each option.
· Do not perform vector control with a surge voltage suppression filter (FR-ASF-H) or sine wave filer (MT-BSL/BSC) connected.
(4) Cable size of the control circuit power supply (terminal R1/L11, S1/L21)
· Terminal screw size: M4
2
· Cable size: 0.75mm
· Tightening torque: 1.5N·m

3.3 Control circuit terminals

(1) Terminal layout
A1
PC AM
(2) Instructions for wiring of the control circuit terminal
1) Terminals 5, PC and SE are common to the I/O signals and isolated from each other. Do not earth (ground).
Avoid connecting the terminal PC and 5 and the terminal SE and 5.
2) Use shielded or twisted cables for connection to the control circuit terminals and run them away from the main and
power circuits (including the 200V relay sequence circuit).
3) Use two or more parallel micro-signal contacts or twin contacts to
prevent a contact faults when using contact inputs since the
control circuit input signals are micro-currents.
4) Do not apply a voltage to the contact input terminals (e.g. STF) of
the control circuit.
5) Always apply a voltage to the alarm output terminals (A, B, C) via a relay coil, lamp, etc.
6) It is recommended to use the cables of 0.75mm
If the cable gauge used is 1.25mm
the cables are run improperly, resulting in an operation panel contact fault.
7) The wiring length should be 30m maximum.
7
Instruction Manual.)
2
to 2mm
B1 C1 A2 B2 C2
10E 10 2 5 4
2
or more, the front cover may be lifted when there are many cables running or
00023
300m
200m
Instruction Manual. (When using an option sine wave filter (MT-BSL/BSC) for
RL RM RH RT AU STOP
1 SE RUN SU IPF
2
gauge for connection to the control circuit terminals.
00052 or
00038
more
500m 500m
300m 500m
100m
50m
CA SD PC
RES STF STR PC
OL FU MRS JOG CS
Micro signal contacts Twin contacts