Mitsubishi Electric FR-A740-00023 Instruction Manual page 34

Control circuit specifications
Terminal Terminal
Symbol Name
10E
Frequency
setting power
supply
10
Frequency
2 setting
(voltage)
Frequency
4 setting
(current)
Frequency
1 setting
auxiliary
Frequency
5 setting
common
*1 Set Pr. 73, Pr. 267, and a voltage/current input switch correctly, then input an analog signal in accordance with the setting.
Applying a voltage signal with voltage/current input switch on (current input is selected) or a current signal with switch off (voltage input is
selected) could cause component damage of the inverter or analog circuit of signal output devices. (For details, refer to page 275.)
(2) Output signals
Terminal Terminal
Symbol Name
A1,
Relay output 1
B1,
(alarm output)
C1
A2,
B2, Relay output 2
C2
24
Description
When connecting the frequency setting potentiometer at an initial
status, connect it to terminal 10.
Change the input specifications of terminal 2 when connecting it
to terminal 10E. (Refer to Pr. 73 Analog input selection page 278.)
Inputting 0 to 5VDC (or 0 to 10V, 0 to 20mA) provides the
maximum output frequency at 5V (10V, 20mA) and makes input
and output proportional. Use Pr. 73 to switch from among input 0
to 5VDC (initial setting), 0 to 10VDC, and 0 to 20mA.
Set the voltage/current input switch in the ON position to select
current input (0 to 20mA).
*1
Inputting 4 to 20mADC (or 0 to 5V, 0 to 10V) provides the
maximum output frequency at 20mA makes input and output
proportional. This input signal is valid only when the AU signal is
on (terminal 2 input is invalid). 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 OFF position to select
voltage input (0 to 5V/0 to 10V).
functions.
Inputting 0 to ±5 VDC or 0 to ±10VDC adds this signal to terminal
2 or 4 frequency setting signal. Use Pr. 73 to switch between the
input 0 to ±5VDC and 0 to ±10VDC (initial setting).
Common terminal for frequency setting signal (terminal 2, 1 or 4)
and analog output terminal AM and CA. Do not earth (ground).
Description
1 changeover contact output indicates that the inverter
protective function has activated and the output stopped.
Abnormal: No conduction across B-C (Across A-C Continuity),
Normal: Across B-C Continuity (No conduction across A-C)
1 changeover contact output
Use Pr. 858 to switch terminal
*1
Rated Refer to
Specifications page
10VDC±0.4V
Permissible load 275
current 10mA
5.2VDC±0.2V
Permissible load 275
current 10mA
Voltage input:
Input resistance
10kΩ ± 1kΩ
275
Maximum
permissible
voltage 20VDC
Current input:
Input resistance
245Ω ± 5Ω
Maximum
permissible
current 30mA
275
4 2
Voltage/current
input switch
switch1
switch2
Input resistance
10kΩ ± 1kΩ
Maximum 275
permissible
voltage ± 20VDC
- -- -- - -- -- - -- -- -- - -- 275
Rated Refer to
Specifications page
Contact capacity:
230
230VAC 0.3A
(Power
factor=0.4)
30VDC 0.3A
230