Rockwell Automation 1738-AENTR, Series A 1734 POINT I/O and 1738 ArmorPOINT I/O 2 Port Ethernet/IP Adapter User Manual - Manual (Page 75)

Rockwell Automation Publication 1734-UM014B-EN-P - June 2013 67
Troubleshoot the Adapter Chapter 6
System power Off Not active. Adapter power is off, or there is a DC-DC converter problem.
Solid green System power is on. DC-DC converter output is active (5V).
Field power Off Not active. Adapter power is off.
Solid green Power is on. 24V input is present.
Status Indicators for 1734-AENTR Adapter
Status Description