The isolated RS-485 interface is available at a 3-pin compression type connector X102. It features a bidirectional balanced communication bus (A and B) and a connection for the shield wire/ground reference. Typical connection is through a shielded twisted pair (STP) cable. The RS-485 connection is compliant with TIA/ EIA-485. Bus termination can be activated or deactivated though a jumper on the PSU module. Jumper X3 on PSU PCBA provides a user installable termination option. Total termination is 120 Ω if jumper X3 is inserted.
See the installation manual for instructions on how to change termination configuration.