Mitsubishi Electric 800 Series Instruction Manual page 35

Control circuit
Terminal
Terminal name
Symbol
10E
Frequency setting
power supply
10
Frequency setting
2
(voltage)
Frequency setting
4
(current)
Frequency setting
1
auxiliary
Frequency setting
5
common
10
PTC thermistor input
2
24 V external power
+24
supply input

Set Pr.73, Pr.267, and the voltage/current input switch correctly, then input an analog signal in accordance with the setting.
Applying a voltage with the voltage/current input switch ON (current input is selected) or a current with the switch OFF (voltage input is selected)
could cause component damage of the inverter or analog circuits of output devices. (For the details, refer to the FR-A800 Instruction Manual
(Detailed).)

Sink logic is initially set for the FM-type inverter.

Source logic is initially set for the CA-type inverter.
34
INSTALLATION AND WIRING
Terminal function description
When connecting the frequency setting potentiometer at an initial
status, connect it to the terminal 10.
Change the input specifications of the terminal 2 using Pr.73 when
connecting it to the terminal 10E.
Inputting 0 to 5 VDC (or 0 to 10 V, 0 to 20 mA) provides the
maximum output frequency at 5 V (10 V, 20 mA) and makes input
and output proportional. Use Pr.73 to switch among input 0 to 5
VDC (initial setting), 0 to 10 VDC, and 0 to 20 mA. Set the voltage/
current input switch in the ON position to select current input (0 to
20 mA).

Inputting 4 to 20 mADC (or 0 to 5 V, 0 to 10 V) provides the
maximum output frequency at 20 mA and 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 among input 4
to 20 mA (initial setting), 0 to 5 VDC, and 0 to 10 VDC. Set the
voltage/current input switch in the OFF position to select voltage
input (0 to 5 V/0 to 10 V).

Use Pr.858 to switch terminal functions.
Inputting 0 to ±5 VDC or 0 to ±10 VDC adds this signal to terminal
2 or 4 frequency setting signal. Use Pr.73 to switch between input 0
to ±5 VDC and 0 to ±10 VDC (initial setting). Use Pr.868 to switch
terminal functions.
Common terminal for frequency setting signal (terminal 2, 1 or 4)
and analog output terminal AM, CA. Do not earth (ground).
For receiving PTC thermistor outputs.
When PTC thermistor is valid (Pr.561  "9999"), the terminal 2 is
not available for frequency setting.
For connecting a 24 V external power supply.
If a 24 V external power supply is connected, power is supplied to
the control circuit while the main power circuit is OFF.
(Refer to page 42.)
Rated specification
10 VDC 0.4 V
Permissible load current
10 mA
5 VDC 0.5 V
Permissible load current
10 mA
When voltage is input:
Input resistance 10 k1
k
Maximum permissible
voltage 20 VDC
When current is input:
Input resistance 245  5

Permissible maximum
current 30 mA
Voltage/current
input switch
switch2
switch1
2 4
Input resistance 10 k 1
k
Permissible maximum
voltage 20 VDC
—
Applicable PTC
thermistor specification
Overheat detection
resistance:
0.5 to 30 k
(Set by Pr.561)
Input voltage 23 to 25.5
VDC
Input current 1.4 A or less