Control Terminal Specification - Mitsubishi Electric 800 Series Instruction Manual

1.3

Control terminal specification

 Input signal
Terminal
Terminal name
symbol
STF Forward rotation start
STR Reverse rotation start
Digital input terminal
DI1 to DI4
1 to 4
OH Thermal protector input
RES Reset
14
PRE-OPERATION INSTRUCTIONS
Terminal function description
Turn ON the STF signal to start forward
rotation and turn it OFF to stop.
Turn ON the STR signal to start reverse
rotation and turn it OFF to stop.
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).
Use this signal to reset a fault output provided when a protective
function is activated. Turn ON the RES signal for 0.1 s or longer,
then turn it OFF.
In the initial setting, reset is always enabled. By setting Pr.75 , reset
can be enabled only at an inverter fault occurrence. The inverter
recovers about 1 s after the reset is released.
Rated specification
When the STF and Input resistance: 4.7 kΩ
STR signals are Voltage when contacts are
turned ON open: 21 to 27 VDC
simultaneously, Current when contacts are
the stop command short-circuited: 4 to 6
is given. mADC
When terminal DI4 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
Input resistance: 4.7 kΩ
Voltage when contacts are
open: 21 to 27 VDC
When contacts are short-
circuited: 4 to 6 mADC