Allen-Bradley 2080-LC20-20QBB User Manual page 58

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