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Hitachi SJ Series
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7-32
Chapter 7
Wire Connection and Optional Devices
Analog input/output
(Wiring example)
In the example shown on the left, voltage is input
when the variable resistor is used in H-Ai1-L,
therefore, set the SW1 of analog input 1 (Ai1) to
the voltage side.
In the example shown on the left, if the frequency
meter supports current measurement feature
(4-20mA), set the SW3 of analog output 1 (Ao1)
to the current side of SW3.
Terminal
symbol
Terminal name
Description Electrical characteristics
Analog input terminal for switching voltage and current
Power supply
L
Analog
power common
Common terminals for analog input terminals
(Ai1, Ai2, Ai3) and analog output terminals
(Ao1, Ao2).
There are two L terminals.
H
Power supply for
setting speed
This is a DC10V power supply. It is used
when using analog input terminals (Ai1, Ai2,
Ai3) and variable resistor for inputting
voltage.
Maximum allowable input current
20mA
Analog input
Ai1
Analog
input terminal 1
(voltage/current
switching SW1)
For Ai1 and Ai2, DC0-10V voltage input and
0-20A current input can be switched using
a switch for use. It can be used for input
frequency command or feedback.
In the case of voltage input:
Input impedance about 10k
Allowable input voltage
DC-0.3V-12V
In the case of current input:
Input impedance about 100
Maximum allowable input
current 24mA
Ai2
Analog
input terminal 2
(voltage/current
switching SW2)
Ai3
Analog
input terminal 3
DC-10V to 10V voltage input is available. It
can be used for input frequency command
or feedback.
Only voltage input:
Input impedance about 10k
Allowable voltage input DC-12V
to 12V
Analog output
Ao1
Analog
output terminal 1
(voltage/current
switching SW3)
For Ao1 and Ao2, DC0-10V voltage output
and 0-20A current output can be switched
using a switch as output of information
monitor data of the inverter.
In the case of voltage output:
Maximum allowable output
current 2mA
Output voltage accuracy ±10%
(ambient temperature: 25°C±
10°C)
In the case of current input:
Allowable load impedance 250
or below
Output current accuracy: ±20%
(ambient temperature: 25±10°C)
Ao2
Analog
output terminal 2
(voltage/current
switching SW4)
Control circuit
terminal area
SW4 SW3 SW2 SW1
Ao2
Ao1
Analog input/output
H Ai1
Ai2
Ai3
L L
Variable resistor for frequency
command (0.5k-2k)
* A resistor of 1k and 1W or
above is recommended
Frequency
meter

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