Control Terminal Types - Danfoss Turbocor Installation Manual

Installation
problem by fitting an equalizing cable next to the control
cable. Minimum cable cross section: 16 mm
PLC
PE
PE
1
2
1
Min. 16 mm 2
2 Equalizing cable
Illustration 3.9 Correct Screening
50/60 Hz ground loops
With very long control cables, ground loops may occur. To
eliminate ground loops, connect one end of the screen-to-
ground with a 100 nF capacitor (keeping leads short).
PLC
PE
100nF
Illustration 3.10 Avoiding Ground Loops
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:
FC
69
68
61
PE
PE
2
1
Min. 16 mm 2
2 Equalizing cable
Illustration 3.11 Avoiding EMC Noise
Alternatively, the connection to terminal 61 can be
omitted:
FC
69
68
PE
PE
2
MG35Q202
Installation Guide
2
.
FC
PE
<10 mm
PE
FC
PE <10 mm
FC
69
68
61
PE
<10 mm
PE
1
FC
68
69
PE
<10 mm
PE
1
Danfoss A/S © 01/2015 All rights reserved.
1 2
Min. 16 mm
2 Equalizing cable
Illustration 3.12 Screening without Using Terminal 61

3.5.4 Control Terminal Types

2
Illustration 3.13 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
RS485 serial communications connection
•
Connector 3 provides 2 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 2 Form C relay outputs that are
located on the power card
3
3
4
1
15
3