Control Circuit Specifications; Control Circuit Terminal - Mitsubishi Electric FR-D720 K Series Instruction Manual

Control circuit specifications

2.3 Control circuit specifications
2.3.1

Control circuit terminal

indicates that terminal functions can be selected using Pr. 178 to Pr. 182, Pr. 190, Pr. 192, Pr. 197 (I/O terminal function
selection). (Refer to page 116.)
(1) Input signal
Terminal
Type Terminal Name
Symbol
STF Forward rotation start
STR Reverse rotation start
RH,
RM, Multi-speed selection
RL
Contact input common
(sink) (initial setting)
External transistor
SD
common (source)
24VDC power supply
common
External transistor
common (sink)
(initial setting)
PC
Contact input common
(source)
24VDC power supply
Frequency setting power
10
supply
Frequency setting
2
(voltage)
Frequency setting
4
(current)
Frequency setting
5
common
10
PTC thermistor input
2
20
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.
Multi-speed can be selected according to the
combination of RH, RM and RL signals.
Common terminal for contact input terminal (sink logic)
and terminal FM.
Connect this terminal to the power supply common
terminal of a transistor output (open collector output)
device, such as a programmable controller, in the
source logic to avoid malfunction by undesirable
currents.
Common output terminal for 24VDC 0.1A power
supply (PC terminal).
Isolated from terminals 5 and SE.
Connect this terminal to the power supply common
terminal of a transistor output (open collector output)
device, such as a programmable controller, in the sink
logic to avoid malfunction by undesirable currents.
Common terminal for contact input terminal (source
logic).
Can be used as 24VDC 0.1A power supply.
Used as power supply when connecting potentiometer
for frequency setting (speed setting) from outside of
the inverter. (Refer to Pr. 73 Analog input selection.)
Inputting 0 to 5VDC (or 0 to 10V) provides the maximum
output frequency at 5V (10V) and makes input and output
proportional. Use Pr. 73 to switch between input 0 to
5VDC input (initial setting) and 0 to 10VDC.
Inputting 4 to 20mADC (or 0 to 5V, 0 to 10V) provides
the maximum output frequency at 20mA and makes
input and output proportional. This input signal is valid
only when the AU signal is ON (terminal 2 input is
invalid). To use terminal 4 (initial setting is current
input), set "4" in any of Pr.178 to Pr.182 (input terminal
function selection) to assign the function, and turn ON
AU signal.
Use Pr. 267 to switch from among input 4 to 20mA
(initial setting), 0 to 5VDC and 0 to 10VDC. Set the
voltage/current input switch in the "V" position to select
voltage input (0 to 5V/0 to 10V).
Frequency setting signal (terminal 2, 4) common
terminal. Do not earth (ground).
For connecting PTC thermistor output.
When PTC thermistor protection is valid (Pr. 561 
"9999"), terminal 2 is not available for frequency
setting.
Rated Specifications
When the STF and STR
Input resistance 4.7k
signals are turned ON
Voltage when contacts are
simultaneously, the stop
open
command is given.
21 to 26VDC
Current when contacts are
short-circuited
4 to 6mADC
Power supply voltage range
22 to 26.5VDC
permissible load current
100mA
5.0V0.2VDC
permissible load current
10mA
Input resistance 10k1k
Permissible maximum
voltage 20VDC
Current input:
Input resistance 2495
Maximum permissible
current 30mA
Voltage input:
Input resistance 10k 1k
Permissible maximum
voltage 20VDC
Current input
(initial status)
Adaptive PTC thermistor
specification
Heat detection resistance :
500 to 30k (Set by Pr.
561)
Refer to
Page
120
92
— —
23
153
153
153
Voltage input
— —
103