Chapter 3 Wiring ASDA-A2R Series3-46 Revision December. 20143.5 Wiring of CN3 Connector3.5.1 Layout of CN3 ConnectorThe servo drive connects to the personal computer via communication connector. Theuser can operate the servo drive via MODBUS, PLC or HMI. There are two commoncommunication interfaces, RS-232 and RS-485. Both can be set via parameter P3-05.Among them, RS-232 is more common. Its communication distance is about 15 meter. Ifthe user selects RS-485, its transmission distance is longer and supports more than oneservo drives for connection.CN3 Connector(female)Side view Rear viewPin No Signal Name Terminal Symbol Function and Description1 Signal grounding GND + 5 V connects to the signal terminal2 RS-232 datatransmissionRS-232_TX The drive transmits the dataThe connector connects to RS-232 of PC3 - - Reserved4 RS-232 datareceivingRS-232_RX The drive receives the dataThe connector connects to RS-232 of PC5 RS-485 datatransmissionRS-485(+) The drive transmits the date to differentialterminal (+)6 RS-485 datatransmissionRS-485(-) The drive transmits the date to differentialterminal (-)NOTE 1） Please refer to Chapter 9, page 2 for the wiring of RS-485.2） Two kinds of communication wire of IEEE1394 are commerciallyavailable. One of the internal ground terminals (Pin 1) will shortcircuit with the shielding and will damage the drive. Do not connectGND to the shielding.Reserved
