Mitsubishi Electric FR-A800, Instruction Manual

Page: 67 / 1042

Installation and wiring Control circuit
FR-A800 2 - 37
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 page 5-389.)
The sink logic is initially set for the FM-type inverter.
The source logic is initially set for the CA-type inverter.
Co
n
ta
c
t i
n
p
u
t
PC
External transistor
common (sink)
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.
Power supply
voltage range
19.2 to 28.8 V DC
Permissible load
current 100 mA
2-41
Contact input
common (source)
Common terminal for contact input terminal (source
logic).
24 V DC power
supply
Can be used as 24 V DC 0.1 A power supply.
Fr
eque
nc
y setting
10E
Frequency setting
power supply
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.
10 V DC ±0.4 V
Permissible load
current 10 mA
5-389
10
5 V DC
±
0.5 V
Permissible load
current 10 mA
5-389
2
Frequency setting
(voltage)
Inputting 0 to 5 V DC (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 V DC (initial setting), 0 to
10 V DC, and 0 to 20 mA. Set the voltage/current input
switch in the ON position to select current input (0 to
20 mA). When voltage is
input:
Input resistance
10 k
Ω ±
1 k
Ω
Maximum
permissible voltage
20 V DC
When current is
input:
Input resistance
245
Ω ±
5
Ω
Permissible
maximum current
30 mA
5-389
4
Frequency setting
(current)
Inputting 4 to 20 mA DC (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 V DC, and 0 to 10 V DC. 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.
5-389
1
Frequency setting
auxiliary
Inputting 0 to ±5 V DC or 0 to ±10 V DC adds this
signal to terminal 2 or 4 frequency setting signal. Use
Pr. 73 to switch between input 0 to ± 5 V DC and 0 to
±10 V DC (initial setting). Use Pr. 868 to switch terminal
functions.
Input resistance
10 k
Ω ±
1 k
Ω
Permissible
maximum voltage
±
20 V DC
5-389
5
Frequency setting
common
Common terminal for frequency setting signal
(terminal 2, 1 or 4) and analog output terminal AM, CA.
Do not earth (ground).
⎯
5-389
Th
e
rm
is
to
r
10
2
PTC thermistor input
For receiving PTC thermistor outputs.
When PTC thermistor is valid (Pr. 561
≠
"9999"), the
terminal 2 is not available for frequency setting.
Applicable PTC
thermistor
specification
Overheat detection
resistance:
0.5
Ω
to 30 k
Ω
(Set by Pr. 561)
5-292
Ex
te
rn
al p
o
we
r
sup
p
ly
input
+24
24 V external power
supply input
For connecting 24 V external power supply.
If the 24 V external power supply is connected, power
is supplied to the control circuit while the main power
circuit is OFF. Input voltage
23 to 25.5 V DC
Input current
1.4 A or less
2-51
Ty
p
e
Terminal
symbol
Terminal name Terminal function description
Rated
specification
Refer
to
page
Tab. 2-13: Input signals (2)
2 4
Voltage/current
input switch
Switch 1
Switch 2