Vaidnor VDF650 Series, User Manual

Page: 43 / 296

Mechanical and Electrical Installation VDF650 User Manual
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42
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In applications where the analog signal suffers severe interference
,
install filter
capacitor or ferrite magnetic core at the analog signal source
.
Figure 3
-
16 Install flter capacitor or ferrite magnetic core
AI1
GND
Cross or wind two or three
coils in the same direction
0
.
022 uF
,
50 V
Ferrite
magnetic core
C
VDF650
2
)
Wiring of DI terminals
Generally
,
select shielded cable no longer than 20 m
.
When active driving is adopted
,
necessary fltering measures shall be taken to prevent the interference to the power
supply
.
It is recommended to use the contact control mode
.
a
.
SINK wiring
Figure 3
-
17 Wiring in SINK mode
0V
DI5
DI1
OP
+
24V
+
24V
2
.
4k
2
.
4k
3
.
3
Ω
NPN
Signal
External
controller
Control board
of the AC drive
+
VCC
COM
This is the most commonly used wiring mode
.
To apply external power supply
,
remove
jumpers between
+
24 V and OP and between COM and CME
,
and connect the positive
pole of external power supply to OP and negative pole to CME
.
In such wiring mode
,
the DI terminals of different AC drives cannot be connected in
parallel
.
Otherwise
,
DI mal
-
function may result
.
If parallel connection
(
different AC
drives
)
is required
,
connect a diode in series at the DI and the diode needs to satisfy
the requirement
:
IF
>
10 mA
,
UF
<
1 V
.