Hitachi SJ Series, User Manual

Page: 87 / 786

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
A
n
a
lo
g
i
n
p
u
t
te
rm
in
a
l
fo
r
s
w
it
c
h
in
g
v
o
lt
a
g
e
a
n
d
c
u
rr
e
n
t
P
o
w
e
r
s
u
p
p
ly
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
A
n
a
lo
g
i
n
p
u
t
Ai1
Analog
input terminal 1
(voltage/current
switching SW1)
For Ai1 and Ai2, DC0-10V voltage input and
0-20
ｍ
A 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 Ω
・
Allowable input voltage
DC-0.3V-12V
In the case of current input:
・
Input impedance about 100 Ω
・
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 Ω
・
Allowable voltage input DC-12V
to 12V
A
n
a
lo
g
o
u
tp
u
t
Ao1
Analog
output terminal 1
(voltage/current
switching SW3)
For Ao1 and Ao2, DC0-10V voltage output
and 0-20
ｍ
A 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 Ω
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
Ω -2k Ω )
* A resistor of 1k Ω and 1W or
above is recommended
Frequency
meter