Mitsubishi Electric FR-E710W-0.1K, Instruction Manual

Page: 39 / 349

30
Control circuit specifications
(3) Control circuit common terminals (SD, 5, SE)
Terminals SD, SE and 5 are common terminals for I/O signals.(All common terminals are isolated from each other.) Do not
earth them. 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, RH, RM, RL, MRS, RES) 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 the frequency setting signals (terminal 2 or 4). It should be protected from external noise
using a shielded or twisted wire.
Terminal SE is a common terminal for the open collector output terminal (RUN, FU). The contact input circuit is isolated from
the internal control circuit by photocoupler.
(4) Signal inputs by contactless switches
(5) Wiring instructions
1) It is recommended to use the wires of 0.3mm
2
to 0.75mm
2
gauge for connection to the control circuit terminals.
2) The maximum wiring length should be 30m (200m for terminal FM).
3) Do not short terminal PC and SD. Inverter may be damaged.
4) Use two or more parallel micro-signal contacts or twin contacts to prevent
contact faults when using contact inputs since the control circuit input signals
are micro-currents.
5) Use shielded or twisted wires 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.
The contacted input terminals of the inverter (STF, STR,
RH, RM, RL, MRS, RES) can be controlled using a
transistor instead of a contacted switch as shown on the
right.
External signal input using transistor
+24V
STF, etc.
SD
Inverter
Micro signal contacts Twin contacts