Control Terminal Specification - Mitsubishi Electric 800 Series Instruction Manual

1.3

Control terminal specification

 Input signal
Terminal
Function
symbol
STF
STR
SD (sink
(negative
Contact common))
input PC (source
DI1 to DI4
(positive
common))
OH
14
PRE-OPERATION INSTRUCTIONS
Common Terminal name
Forward rotation
start
Reverse rotation
start
Digital input
terminal
1 to 4
Thermal protector
input
Terminal function description
Turn ON the STF signal to start
forward rotation and turn it OFF
to stop.
The function of terminal can be
changed with Pr.178 (Input
terminal function selection).
Turn ON the STR signal to start
reverse rotation and turn it OFF
to stop.
The function of terminal can be
changed with Pr.179 (Input
terminal function selection).
Functions can be assigned to terminals by the
input terminal function selection (Pr.180 to
Pr.182, Pr.185).
Temperature detector input terminal for overheat
protection of a motor.
When the OH signal turns OFF, the external
thermal relay (E.OHT) protective function is
activated
Use Pr.876 to switch valid/invalid status of
terminal function.
Switches the control logic (sink logic or source
logic) independently by the external thermal relay
switch (SW5A).
Rated
specification
Input resistance:
4.7 kΩ
Voltage when
When the STF
contacts are open:
and STR
21 to 27 VDC
signals are
Current when
turned ON
contacts are short-
simultaneously,
circuited: 4 to 6
the stop
mADC
command is
*When terminal DI4
given.
is used as a pulse
train input terminal:
Input resistance: 2
kΩ
When contacts are
short-circuited: 8 to
13 mADC
Input resistance:
940 Ω
Voltage when
contacts are open:
21 to 27 VDC
Current when
contacts are short-
circuited: 140 to
180 mADC