Mechanical and Electrical Installation VD520 Series Inverter User Manual
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J14
+24V OPEN COM
+24V
3.3k
COM
HDI1
、
DI1~DI5
+24V
OPEN
External circuit
Internal circuit
K
Fuse
Protector
DC24V
VicRuns
Fig 3.7-3 Diagram of digital input terminal with external power connection
Use external power(power must comply with UL CLASS 2 standard, a 4A fuse protector should be
added between power and port), wiring diagram as Fig 3.7-3 showed.(take note to remove the
connect wire between J14 jumper OPEN and +24V terminal)
3.7.5.2 Analog Input Terminal
Since the weak analog voltage signal is easy to suffer external interferences, it needs to use shielded
twist cable generally and the length shall be no longer than 20meters, as shown in Fig 3.7-4, 3.7-5. In
case the analog signal is subject to severe interference, and analog signal source side shall be
installed with filter capacitor or ferrite magnetic core, as shown in Fig 3.7-6.
PE
5/10V
AI1
、
AI2
GND
≤
20m
Potentionmeter
Address
J15
10V
5V
5/10V
J5
V
AI2
A
External circuit
Internal circuit
VicRuns
Fig 3.7-4 Schematic diagram of analog input terminal input voltage signal with shield twist cable
PE
AI2
GND
≤
20m
External
Analog
source
DC0~20mA
DC4~20mA
Proximal cable
grounding
J5
V
C
AI2
External circuit
Internal circuit
VicRuns
Fig 3.7-5 Schematic diagram of analog input terminal input current signal with shield twist cable