Bently Nevada | 3500/32M | 125720-01 | Spare 4-Channel Relay Output ModuleDescription The 125720 01 is a Relay I O Module developed by Bently Nevada. It belongs to the 4 Channel Relay Module system and features four relay outputs. This full size module can be installed in any slot to the right of the Rack Interface Module, and multiple 4 Channel Relay Modules can be added as needed. Each relay output is independently programmable to meet specific voting logic requirements. Specifications: Part Number: 125720 01