Description The Trusted Field Termination Assembly (FTA) 24V dc Digital Input T8800 is designed to act as the main interface between a field device generating a digital signal and the Trusted TMR 24V dc Digital Input Module T8403. Features 40 input channels per FTA. Industry standard field device connections (2-wire). Standard DIN rail compatibility. Simple installation and connection. 24V dc operation. SmartSlot connection for one to many hot replacement of input modules. Fused field power supply per channel. On-board LED indication field power supply integrity.