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Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
Chapter 1 Hardware Overview
Embedded Ethernet Support
For Micro850 and Micro870 controllers, a 10/100 Base-T Port (with embedded green and yellow
LED indicators) is available for connection to an Ethernet network through any standard RJ-45
Ethernet cable. The LED indicators serve as indicators for transmit and receive status.
Micro850 and Micro870 controllers support Ethernet crossover cables (2711P-CBL-EX04).
Ethernet Status Indication
Micro850 and Micro870 controllers also support two LEDs for EtherNet/IP™ to indicate the
following:
• Module status
• Network status
See
for descriptions of Module and Network status indicators.
Yellow LED
Green LED
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
Differential Ethernet receive
data +
4
Terminated
5
Terminated
6
RX-
IN
Differential Ethernet receive
data -
7
Terminated
8
Terminated
Shield
Chassis ground
The yellow status LED indicates
Link (solid yellow) or No Link (off).
The green status LED indicates
activity (blinking green) or no
activity (off).