Rockwell Automation 2080-LC20-20QBBR Micro820 20-point Programmable Controllers User Manual - Manual (Page 12)

4 Rockwell Automation Publication 2080-UM005A-EN-E - December 2013
Chapter 1 Hardware Overview
The communication port (both RS232 and RS485) are non-isolated. The signal
ground of the port is not isolated to the logic ground of the controller.
The RS232 port supports connection to the Micro800 Remote LCD module
(2080-REMLCD).
Embedded Ethernet Support
A 10/100 Base-T Port is available for connection to an Ethernet network through
any standard RJ-45 Ethernet cable.
RS232/RS485 Serial Port Pin Definition
Pin Definition RS485
Example RS232
Example
1 RS485+ RS485+ (not used)
2 RS485- RS485- (not used)
3 GND GND GND
4 RS232 input (receiver) (not used) RxD
5 RS232 output (driver) (not used) TxD
6 GND GND GND
REMLCD to Micro820 Serial Port Terminal Block Wiring
REMLCD Serial Port
Terminal Block Micro820 Serial Port
Terminal Block
Signal Pin
number Pin
number Signal
RS232 TX 1 <--------> 4 RX RS232
RS232 RX 2 <--------> 5 TX RS232
RS232 G 3 <--------> 6 G RS232
D-
D+ G
Rx
Tx
1 2 3 4 5 6
G
RJ-45 connector
RJ-45 Ethernet Port Pin Mapping
Contact
Number Signal Direction Primary
Function
1 TX+ OUT Transmit data +
2 TX- OUT Transmit data -
3 RX+ IN Receive data +
4 – – –
5 – – –
6 RX- IN Receive data -
7 – – –
8 – – –
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