Control Circuit Terminal Layout; Wiring Instructions - Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual

2.3.3

Control circuit terminal layout

SE
(1) Common terminals of the control circuit (SD, 5, SE)
Terminals SD, 5, and SE are all common terminals (0V) for I/O signals and are isolated from each other. Do not
earth(ground) these terminals.
Avoid connecting the terminal SD and 5 and the terminal SE and 5.
Terminal SD is a common terminal for the contact input terminals (STF, STR, STOP, RH, RM, RL, JOG, RT, MRS, RES,
AU, CS) and frequency output signal (FM).
The open collector circuit is isolated from the internal control circuit by photocoupler.
Terminal 5 is a common terminal for frequency setting signal (terminal 2, 1 or 4) and analog output terminal AM.
It should be protected from external noise using a shielded or twisted cable.
Terminal SE is a common terminal for the open collector output terminal (RUN, SU, OL, IPF, FU).
The contact input circuit is isolated from the internal control circuit by photocoupler.
(2) Signal inputs by contactless switches
The contacted input terminals of the inverter (STF, STR, STOP,
RH, RM, RL, JOG, RT, MRS, RES, AU, CS) can be controlled
using a transistor instead of a contacted switch as shown on the
right.
2.3.4

Wiring instructions

1) 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.
2) The maximum wiring length should be 30m (200m for terminal FM).
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) 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).
5) Do not apply a voltage to the contact input terminals (e.g. STF) of the control circuit.
6) Always apply a voltage to the fault output terminals (A, B, C) via a relay coil, lamp, etc.
A1 B1 C1 A2 B2 C2 10E 10
RL RM RH RT AU STOP
RUN SU IPF OL FU SD
2
gauge for connection to the control circuit terminals.
2
or more, the front cover may be lifted when there are many cables running or
2 5 4
MRS RES SD FM AM 1
SD STF STR JOG CS PC
External signal input using transistor
Micro signal contacts
Control circuit specifications
Control circuit terminal
Terminal screw size: M3.5
Tightening torque: 1.2N·m
+24V
STF, etc
Inverter
SD
Twin contacts
2
31