8
Rev. 1.0
10/22/2018
SSDC-R/C Hardware Manual
400-820-9661
2.2 Connecting to the Communication Port
2.2.1 RS-485/422 communication port（-R type）
RS-485/422 communication port
PIN Definition Color
1 RX+ Orange/White
2 RX- Orange
3 TX+ Green/White
4 NC Blue
5 NC Blue/White
6 TX- Green
7 GND Brown/Whitelv
8 GND Brown
Connecting to a Host using RS-485
Before configure the drive by Step-Servo Quick tuner software, use the CAT5 cable to connect the
drive(COM1 or COM2) and host.
RS-485 four-wire connection RS-485 two-wire connection
Drive Connection
RX+
Connect to the host’s TX+
RX-
Connect to the host’s TX-
TX+
Connect to the host’s RX+
TX-
Connect to the host’s RX-
GND
Connect to the host’s GND
Drive Connection
RX+
Connect to the host’s +
RX-
Connect to the host’s -
TX+
Connect to the host’s +
TX-
Connect to the host’s -
GND
Connect to the host’s GND
(NOTE: The RS-485 port on the drive is isolated from internal circuitry of the drive. So the
GND of each drive’s RS-485 port must be connected together. The rst drive’s GND of the
RS-485 port must be connected to the GND of RS-485 port on the host PC or controller.)
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