Danfoss VLT FC 103, Инструкция по эксплуатации

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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
<10 mm
130BB609.12
Figure 2.16
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
130BB923.12
PE PE
69
68
61
69
68
61
1
2
<10 mm
Figure 2.17
1
Min. 0.025 in 2 [16 mm 2 ]
2 Equalizing cable
Table 2.10
Alternatively, the connection to terminal 61 can be
omitted:
PE
FC
PE
FC
130BB924.12
PE PE
69
69 68
68
1
2
<10 mm
Figure 2.18
1 Min. 0.025 in 2 [16 mm 2 ]
2 Equalizing cable
Table 2.11
2.5.4 Control Terminal Types
Terminal functions and default settings are summarized in
2.5.6 Control Terminal Functions .
1
4
2
3
130BA012.12
61
68
69
39
42
50
53
54
55
12
13
18
19
27
29
32
33
20
37
Figure 2.19 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
•
Connector 3 provides two analog inputs, one
analog output, 10 V DC supply voltage, and
commons for the inputs and output.
•
Connector 4 is a USB port available for use with
the MCT 10 Set-up Software
•
Also provided are two Form C relay outputs that
are located on the power card.
•
Some options available for ordering with the unit
may provide additional terminals. See the manual
provided with the equipment option.
Installation
VLT
®
Refrigeration Drive Instruction Manual
2-14 MG16J122 - VLT
®
is a registered Danfoss trademark
2 2