Control Circuit Terminals - Mitsubishi Electric FR-F720-00046 Installation Manuallines

WIRING
(3) Total wiring length
The overall wiring length for connection of a single motor or multiple motors should be
within the value in the table below.
Pr. 72 PWM frequency selection setting
(carrier frequency)
2 (2kHz) or less
3 to 15 (3kHz to 14.5kHz)
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 in this case.
Take the following measures (1) or (2) in this case.
(1) Use a "400V class inverter-driven insulation-enhanced motor" and set frequency in Pr. 72 PWM frequency
selection according to wiring length.
Pr. 72 PWM frequency selection setting
(carrier frequency)
(2) Connect the surge voltage suppression filter (FR-ASF-H) to the FR-F720-02330 (FR-F740-01160) or less and the
sine wave filter (MT-BSL/BSC) to the FR-F720-03160 (FR-F740-01800) 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 the Instruction Manual (applied).)
· For details of Pr. 72 PWM frequency selection ,refer to the Instruction Manual (applied).
BSC) for the FR-F720-03160 (FR-F740-01800) or more, set "25" in Pr.72 (2.5kHz).
For explanation of surge voltage suppression filter (FR-ASF-H) and sine wave filter (MT-BSL/BSC), refer to the manual of each option.
(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

3.2 Control circuit terminals

(1) Terminal layout
· Terminal Screw Size: M3.5
· Tightening torque: 1.2N·m
(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 ground.
2) It is recommended to use the cables of 0.75mm
If the cable gauge used is 1.25mm
or the cables are run improperly, resulting in an operation panel contact fault.
3) The wiring length should be 30m (98.43feet) maximum.
4) 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.
5) 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).
6) Do not apply a voltage to the contact input terminals (e.g. STF) of the control circuit.
7) Always apply a voltage to the fault output terminals (A, B, C) via a relay coil, lamp, etc.
10
50m (164.04feet) or
14.5kHz or less
2
to 2mm
A1 B1 C1
RL RM RH
SE RUN SU IPF
2
or more, the front cover may be lifted when there are many cables running
FR-F720-00046 FR-F720-00077
FR-F740-00023 FR-F740-00038
300m
(984.25feet) (1640.42feet)
200m
(656.19feet)
Wiring Length
50m (164.04feet) to
less 100m(328.08feet)
9kHz or less
When using an optional sine wave filter (MT-BSL/
A2 B2 C2 10E 10
RT AU STOP MRS RES SD
OL FU SD SD STF
2
gauge for connection to the control circuit terminals.
Micro signal contacts
FR-F720-00105 or more
FR-F740-00052 or more
500m
500m (1640.42feet)
300m
500m (1640.42feet)
(984.25feet)
exceeding 100m
(328.08feet)
4kHz or less
2 5 4
CA AM 1
STR JOG CS PC
Twin contacts