852 Series Ethernet switches from WAGO Corp., Germantown, WI, have an alarm contact enabled via dip switch to signal an error condition on the switch. The feature is standard on both managed and umanaged switches. The power input connector has 2 dedicated alarm circuit connections that can be wired to any warning device, such as a PLC or pilot light. Monitored error conditions include port link failure, power supply disruption/disconnect, or power supply voltage out of specified range.
Industrial Ethernet Switches from WAGO