Bently Nevada 3500/32 125720-01 Spare 4-Channel Relay I/O ModuleDescription The Bently Nevada 125720 01 is a 4 Channel Relay I O Module designed for use within the Bently Nevada 3500 series systems. This module features four relay outputs and can be installed in any slot to the right of the Rack Interface Module. The outputs can be programmed independently to perform custom voting logic. Each relay includes Alarm Drive Logic, which can be configured with AND and OR logic to respond to alarms (alerts and dangers)