Schneider Electric 66123 - Manual (Page 68)

Network Management Card & Modbus/Jbus 34022321XT indice :AE Page 68/98
Network Management Teleservice Card
APC by Schneider Electric
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10.1.2.2 RS485 link configuration for 2 wires connexion
Set the SA2 switches like below to set the RS485 mode:
Set the SA1 switches to select the two wires configuration with no termination: