Refer to Table 1 for a list of serial communication terminals and functions. Table 1. Serial Communication Terminals Type Terminal Terminal Name Function (Signal Level) Modbus Communication D+ Communication input/output (+) MEMOBUS/Modbus communications Use an RS-485 cable to connect the drive. Note: Set DIP switch S2 to ON to enable the termination resistor in the last drive in a MEMOBUS/Modbus network. RS-485 MEMOBUS/Modbus communication protocol Maximum 115.2 kbps D- Communication output (-) AC Shield ground 0 V