Danfoss Native BACnet VLT HVAC Drive Operating Instructions Manual page 9

How to Install
3.1.2 Network Connection
Connect the frequency converter to the RS-485 network as follows (see also diagram):
1. Connect signal wires to terminal 68 (P+) and terminal 69 (N-) on the main control board of the frequency converter.
2. Connect the cable screen as described under chapter Bus Cabling.
3 3
NOTE
Screened, twisted-pair cables are recommended to reduce
noise between conductors.
3.1.3 Network Termination
Maximum Cable Lengths
Maximum total bus cable length: 4000 feet ~ 1200m
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VLT HVAC Drive Native BACnet Operating Instructions
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MG.14.C1.02 - VLT
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