-31-
Chapter 3 Installation
Figure 3-5
Schematic diagram of analog input terminal wiring
+10V
AI1
ACM
less than 20m
A
C
D
riv
e
r
Potentiometer
B. Digital input terminal:
AC drive receives figure signal upon its judging of these terminals’states. So the ext-
ernal contactors shall be those connection points with high reliability over weak sign-
als. If the applied open collector output to digital input terminal of AC drive provides
0N/0FF signal, you shall consider the false operation caused from the power crosst-
alk. We advise to adopt contactor control mode.
At some occasion where analog signal suffers severe interference, filter condenser or
ferrite core shall be installed at the side of analog signal source, as Figure 3-6shows:
Figure 3-6
Analog input terminal with filter devices
AI1
GND
wind 2~3 turns
Ferrite core
0.022UF
50V
C
A
C
D
riv
e
r
External
analog
source
C. Digital output terminal:
When driving relay is required for digital output terminals, absorber diode shall be
installed at both sides of relay coil, or it will cause damages to DC 24V power supply.
Attention: The polarity of absorber diode must be installed correctly, as following pict
-
ure shows. Or when digital output terminals are outputted, it will cause DC 24Vpower
supply damaged.
C
h
a
p
te
r
3
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