Rockwell Automation Publication 2080-UM002K-EN-E - March 2019 9
Hardware Overview Chapter 1
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 Troubleshooting
on page 303 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
45920
The yellow status LED
indicates Link (solid yellow)
or No Link (off).
The green status LED
indicates activity (blinking
green) or no activity (off).
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