ICP DAS USA RS-405/405F - Manual (Page 39)

Industrial Redundant Ring Switch – RS Series User Manual
TDRS4050601 ff
Power 1 & Power 2 Status
indicate power is function normally.
indicate there is a power fail occurring.
Indicate RS232/RS485 serial connection is connected
Indicate RS232/RS485 serial connection is disconnected
Indicate the line of the corresponding port is connected.