Rs-485 Communication Interface (Hardware) - Delta ASDA-A3 Series User Manual

MODBUS Communication

9.1 RS-485 communication interface (hardware)

The ASDA-A3 series servo drive supports RS-485 serial communication that you can use to
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access and change the parameters of the servo system. See the following description of the
wiring:
Note:
1. The cable length can be up to 100 meters when the servo drive is installed in a quiet environment. If
the transmission speed is over 38400 bps, however, a 15 meter cable is recommended to ensure data
transmission accuracy.
2. The numbers on the above figure represent the pin number of each connector.
3. Please use 12 V
4. When using RS-485 communication, you may connect up to 32 servo drives. You can install a repeater
to connect more servo drives (the maximum is 127).
5. Please refer to Chapter 3, Wiring for CN3 pin assignment.
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for the power supply.
DC
ASDA-A3
Revision December, 2017