ICP DAS USA RS-405/405F - Manual (Page 59)

Industrial Redundant Ring Switch – RS Series User Manual
TDRS4050601 zz
To activate relay output for port 3, port 4, or port 5 you will need to enable both mask
setting and corresponding ring pair setting (Ring Pair 2). When there is a communication
loss (disconnection) occurs, a relay output will be activated and a warning sign will
be shown.