Mitsubishi Electric FR-D720S SC EC Instruction Manual page 56

Control circuit specifications
Wire removal
Pull the wire with pushing the open/close button all the way down firmly with a flathead screw-
driver.
b
CAUTION:
● Use a small flathead screwdriver (Tip thickness: 0.4mm/tip width: 2.5mm, such as
SZF 0-0,4 x 2,5 of Phoenix Contact Co., Ltd.). If a flathead screwdriver with a narrow
tip is used, terminal block may be damaged.
● Place the flathead screwdriver vertical to the open/close button. In case the blade
tip slips, it may cause to damage of inverter or injuries.
Common terminals of the control circuits PC, 5, SE
Terminals PC, 5, and SE are all common terminals (0V) for I/O signals and are isolated from
each other. Avoid connecting the terminal PC and 5 and the terminal SE and 5. Terminal PC is
a common terminal for the contact input terminals (STF, STR, RH, RM and RL).
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 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 terminals RUN and SO.
The contact input circuit is isolated from the internal control circuit by photocoupler.
Signal inputs by contactless switch
The contacted input terminals of the inverter (STF, STR, RH, RM and RL) can be controlled us-
ing a transistor instead of a contacted switch as shown below. According to the adjusted control
logic, PNP transistors (positive logic) or NPN transistors (negative logic) must be used to acti-
vate the inputs.
3 - 20
Open/close button
Flathead
screwdriver
Inverter
PC
STF, etc.
Fig. 3-12:
Wire removal
Fig. 3-13:
External signal input in source logic using
transistor (initial setting)
Wiring
I001988E
I001020E