Mitsubishi Electric FR-E520 Instruction Manual page 28

(2) Description of the control circuit terminals
Type Symbol
Forward
STF
rotation start
Reverse
STR
rotation start
RH, RM,
Multi-speed
RL selection
MRS Output stop
RES Reset
Contact input
SD common
(sink*)
Power output
and external
transistor
PC common
Contact input
common
(source*)
Frequency
10 setting power
supply
Frequency
2 setting
(voltage)
Frequency
4 setting
(current)
Frequency
5 setting
common
Note: Assign the AU signal to any of the terminals using the input terminal function
selection (Pr. 180 to Pr. 183).
* Used as a contact input signal common terminal for the 400V class by switching
between sink logic and source logic. (Refer to page 26.)
Terminal
Name
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.
Combine the RH, RM and RL signals as
appropriate to select multiple speeds.
Turn on the MRS signal (20ms or longer)
to stop the inverter output.
Used to shut off the inverter output to bring the
motor to a stop by the electromagnetic brake.
Used to reset the protective circuit activated. Turn on the
RES signal for more than 0.1s then turn it off.
Factory setting is for reset always. By setting Pr.75, reset
can be set to enabled only at an inverter alarm occurrence.
(Refer to page 121.) Recover about 1s after reset is
cancelled.
Common to the contact input terminals and terminal FM.
Common output terminal for 24VDC 0.1A power output (PC
terminal).
When transistor output (open collector output), such as a
programmable controller (PLC), is connected, connect the
external power supply common for transistor output to this
terminal to prevent a fault caused by undesirable current.
This terminal can be used as a 24VDC, 0.1A power output.
5VDC, permissible load current 10mA
By entering 0 to 5VDC (0 to 10VDC), the maximum
output frequency is reached at 5V (or 10V) and I/O
are proportional. Use Pr. 73 to switch between input 0
to 5VDC (factory setting) and 0 to 10VDC. Input
resistance 10kΩ. Maximum permissible voltage 20V.
By entering 4 to 20mADC, the maximum output frequency is
reached at 20mA and I/O are proportional. This input signal
is valid only when the AU signal (Note) is on (voltage input is
invalid). Input resistance approximately 250Ω. Maximum
permissible current 30mA.
Common to the frequency setting signals (terminal 2, 1 or 4).
Do not connect to the earth (ground).
INSTALLATION AND WIRING
Description
18
W hen the STF
and STR signals
are turned on
sim ultaneously,
the stop com m and
is given.
Input term inal
function selection
(P r. 180 to P r.
183) changes
term inal
functions.