Danfoss VLT AutomationDrive FC 300, Инструкция по эксплуатации, Страница: 37 / 98

1
2
PE
FC
PE
PLC
130BB922.11
PE PE
Figure 2.25
1 Min. 0.025 in 2 [16 mm 2 ]
2 Equalizing cable
Table 2.8
50/60 Hz ground loops
With very long control cables, ground loops may occur. To
eliminate ground loops, connect one end of the shield-to-
ground with a 100 nF capacitor (keeping leads short).
100nF
FC
PE
PE
PLC
130BB609.11
Figure 2.26
Avoid EMC noise on serial communication
This terminal is connected to ground via an internal RC
link. Use twisted-pair cables to reduce interference
between conductors. The recommended method is shown
below:
PE
FC
PE
FC
130BB923.11
PE PE
69
68
61
69
68
61
1
2
Figure 2.27
1
Min. 0.025 in 2 [16 mm 2 ]
2 Equalizing cable
Table 2.9
Alternatively, the connection to terminal 61 can be
omitted:
PE
FC
PE
FC
130BB924.11
PE PE
69
69
68
68
1
2
Figure 2.28
1 Min. 0.025 in 2 [16 mm 2 ]
2 Equalizing cable
Table 2.10
2.5.4 Control Terminal Types
Terminal functions and default settings are summarized in
2.5.6 Control Terminal Functions .
1
4
2
3
130BA012.11
61
68
69
39
42
50
53
54
55
12
13
18
19
27
29
32
33
20
37
Figure 2.29 Control Terminal Locations
•
Connector 1 provides four programmable digital
input terminals, two additional digital terminals
programmable as either input or output, a 24 V
DC terminal supply voltage, and a common for
optional customer-supplied 24 V DC voltage
•
Connector 2 terminals (+)68 and (-)69 are for an
RS-485 serial communications connection
Installation
VLT
®
Automation Drive D-Frame
Instruction Manual
MG34U222 - VLT
®
is a registered Danfoss trademark 2-23
2 2