48 Rockwell Automation Publication 2080-UM005E-EN-E - March 2018
Chapter 4 Wire Your Controller
Serial Port Terminal Block
Serial Port Wiring
(View into terminal block)
Pin 1 RS485 Data +
Pin 2 RS485 Data -
Pin 3 RS485 Ground
(1)
Pin 4 RS232 Receive
Pin 5 RS232 Transmit
Pin 6 RS232 Ground
(1)
(1) Non-isolated.
46213
Rx
Tx
G
D-
D+
G
Rx
Tx
G
D-
D+
G
Rx
Tx
G
D-
D+
G
If the length of the serial cable is greater
than 3 meters, use an isolated serial port,
catalog number 2080-SERIALISOL.
If the length of the serial cable is greater
than 3 meters, use an isolated serial port,
catalog number 2080-SERIALISOL.
Non-isolated Serial Port of
a Micro820 controller
Serial Port of
External Device
RS-485
RS-232
Do not connect G terminals of the serial port to Earth/Chassis ground.
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