4. All interlock and analog output cables should be shielded with one end of the shield connected to the
common analog or digital ground bus. The other end of the shield must not be grounded as this would
create a ground loop. Refer to Figure 4-2 Modbus Grounding Diagram.
4.2 Interface Cable
The cable that carries the I/O communication to the compressor is 5 meters (16.4 feet) in length and is equipped
with high-density 44-pin connectors (female at one end and male at the other end). An extension cable is available
from your local supplier. An optional 10 meter (32.8 ft) cable is also available in the Spare Parts Selection Guide.
NOTE
If an I/O extension cable is used, heat-shrink tubing should be applied to the mating cable connectors to maintain good conductivity and
protect the connection from heat and humidity.
For RS-485 communication, the maximum cable length should not exceed 100 meters (328 feet). If using RS-232
communication, the cable length should not exceed 15 meters (50 feet) between the PC and the compressor (refer
to Figure 4-3 I/OWiring Specifications.)
Figure 4-3 I/OWiring Specifications
Page 38 of 136 - M-AP-001-EN Rev. S 9/8/2021
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