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Chapter 1
Hardware Overview
4
RS232/RS485 Serial Port Pin Definition
Pin
D+
G
Tx
1
2
3
4
5
6
D-
Rx
G
1
2
3
4
5
6
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).
REMLCD to Micro820 Serial Port Terminal Block Wiring
REMLCD Serial Port
Terminal Block
Signal
Pin
number
RS232 TX
1
<-------->
RS232 RX
2
<-------->
RS232 G
3
<-------->
Embedded Ethernet Support
A 10/100 Base-T Port is available for connection to an Ethernet network through
any standard RJ-45 Ethernet cable.
RJ-45 Ethernet Port Pin Mapping
Contact
Signal
Direction Primary
Number
1
TX+
OUT
2
TX-
OUT
3
RX+
IN
4
–
–
5
–
–
6
RX-
IN
7
–
–
8
–
–
Definition
RS485+
RS485-
GND
RS232 input (receiver)
RS232 output (driver)
GND
Micro820 Serial Port
Terminal Block
Pin
Signal
number
4
RX RS232
5
TX RS232
6
G RS232
RJ-45 connector
Function
Transmit data +
Transmit data -
Receive data +
–
–
Receive data -
–
–
Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
RS485
RS232
Example
Example
RS485+
(not used)
RS485-
(not used)
GND
GND
(not used)
RxD
(not used)
TxD
GND
GND
1
8
46210
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