Design Guide | iC7 Series Air-cooled System Modules
NOTICE
RISK OF ELECTRICAL INTERFERENCE
AuxBus consists of point-to-point connection, but the signals are connected in series. Cables that are longer than 10 m (33 ft) can
create interference and communication problems.
l
Do not exceed 10 m (33 ft) of total AuxBus cabling.
l
Keep AuxBus cables as short as possible and separate them from high-power cables.
Table 13: Cable Requirements for Other than Danfoss-provided Cables
Item
Value
Cable type
6-wire, shielded and twisted pair (STP)
Impedance
120 Ω
Maximum length
10 m (33 ft)
Cable (example): LAPP KABEL, UNITRONIC® BUS LD FB P, 2170215.
Cable (example, UL): LAPP KABEL, UNITRONIC® BUS LD FB P A, 2170815.
Connector: Phoenix Contact, MC 1,5/ 5-ST-3,5 BK, 1769919 (LCL Filter: 2721-105/026-000).
Cabling recommendation for drives with a loose option AuxBus
Cabling recommendation for drives with integration unit filters
6.14.3
AuxBus Grounding Principles
To ensure robust communication, good grounding strategy is needed. Below is a recommended grounding strategy illustrated using
integration units. Same strategy can be applied for loose option filters.
X25
X86
X85
X85
X86
X85
X86
A
1
+24 V
2
GND
3
CAN_H
4
CAN_L
5
+24 V
B
C
D
1
+24 V
2
GND
3
CAN_H
4
CAN_L
5
Term. Disable
1
+24 V
2
GND
3
CAN_H
4
CAN_L
1
+24 V
2
GND
3
CAN_H
4
CAN_L
1
+24 V
2
GND
3
CAN_H
4
CAN_L
5
+24 V
1
+24 V
2
GND
3
CAN_H
4
CAN_L
5
+24 V
1
+24 V
2
GND
3
CAN_H
4
CAN_L
5
+24 V
5
Term. Disable
5
Term. Disable
e3
0b
h6
75
.1
0
Figure 34: AuxBus Circuit Diagram
A
The AuxBus interface in the power unit
B
AuxBus board 1
C
AuxBus board 2
D
AuxBus board 3
Danfoss Drives Oy © 2024.03 AJ389643111587en-000101 / 172F6361A |
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