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
1
8
1
8
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 first drive’s GND of the
RS-485 port must be connected to the GND of RS-485 port on the host PC or controller.)