To expand the number of controlled parameters, RDF has a series of plug-in modules housed in dedicated rack units. Inputs and Outputs number can be expanded to manage an incredible amount of data:

• Up to 256 analog inputs (8, 10, 12 or 16 bit resolution)
• Up to 248 digital inputs (contact inputs on-off)
• Up to 256 relays (digital output)
• Up to 32 x 10bit resolution analog outputs.

They are configurable, both locally and remotely, and are programmable to generate alarms or run simple routines, called macros.
Furthermore, the I/O state can be read, both on site and remotely, at any time. There are two versions of dedicated rack mounts to host expansion modules:

• PW-RACK, featuring an independent embedded power supply
• BS-RACK, that uses power distributed via RS485

DAM/ANT104 module adds 8 analog or digital inputs plus 4 relay outputs. On board bridges allow to switch any input from analog to digital. Each circuit feature an embedded voltage converter to completely opt isolate external connections. All inputs have a common ground, galvanically isolated from the RS485 interface BUS.