Mitsubishi Electric FR-A520-0.4K-NA Instruction Manual page 31

5) Source logic type
• In this logic, a signal switches on when a current flows into the corresponding signal input terminal.
Terminal PC is common to the contact input signals. Terminal SE is common to the open collector
output signals.
PC
Current
STF
STR
• When using an external power supply for transistor output, use terminal SD as a common to prevent
misoperation caused by leakage current.
( 4 ) How to use terminals "STOP", "CS" and "PC"
1) Using the "STOP" terminal
A connection example (for sink logic) for self-holding the start signal (forward
rotation, reverse rotation) is shown on the right.
2) Using the "CS" terminal
This terminal is used to perform automatic restart after instantaneous power failure
and commercial power supply-inverter switch-over operation.
<Example: Automatic restart after instantaneous power failure in sink logic>
Connect terminals CS-SD and set a value other than "9999" in Pr. 57 "coasting time
for automatic restart after instantaneous power failure".
3) Using the "PC" terminal
This terminal can be used as 24VDC power output using SD as a common terminal.
Specifications: 18V to 26VDC, 0.1A permissible current
Note that the wiring length should be within 30m.
Do not short terminals PC-SD.
When terminal PC is used as a 24V power supply, leakage current from transistor output cannot be
prevented.
EX. A current flows out of
the corresponding signal RUN
R
R
AY-80
9
1
2
10
INSTALLATION AND WIRING
Inverter
PC
DC24V
STF
(SD)
STR
SD
21
RUN
SE
STOP
MRS
Stop
RES
SD
Forward
rotation
STF
Reverse
rotation
STR
CS SD
(Short)