8
Rev. 1.0
09/06/2015
MSSTB-R/C Hardware Manual
400-820-9661
2.2 Connecting communication (-R model)
MSSTB05-R RS-485 Port
MSSTB10-R RS-485 Port
1
5
1
5
1
8
1
8
PIN
Signal
1
RX+
2
RX-
3
TX+
4
TX-
5
GND
PIN
Signal
1
RX+
2
RX-
3
TX+
4.5
NC
6
TX-
7.8
GND
Connection STB drive with PC using RS-485 communication
Before using
STB configurator
for –R drive configuration, please connect COM1 or COM2 on the
driver to host PC by RS-485 daisy chain cable or network cable provided. Both 4 wire connection
or 2 wire connection can be used.
RS-485 four-wire connection:
RS-485 two-wire connection:
Drive
Connection
RX+
Connect to host’s TX+
RX-
Connect to host’s TX-
TX+
Connect to host’s RX+
TX-
Connect to host’s RX-
GND
Connect to host’s GND
Drive
Connection
RX+
Connect to host’s +
RX-
Connect to host’s -
TX+
Connect to host’s +
TX-
Connect to host’s -
GND
Connect to 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.
