MU-T Series FTA Introduction 

Terminal connectors on the Field Termination Assembly (FTA) provide the connection points for the process control wiring. Fuses, relays, and resistors protect the FTA circuitry, and sense, condition, or operate the connected device. The FTA communicates with an associated IOP, which in turn communicates with the HPMM(s) through the I/O Link Interface.

FTAs types

Standard types of FTAs, as described, interface the field wiring and provide communication with an associated IOP. They are categorized as “standard” because Galvanically Isolated FTAs are also available as described. 

Vertical FTA Mounting Channels 

Both standard (non-Galvanically Isolated) and Galvanically Isolated FTAs are mounted on a vertically oriented FTA Mounting Channel in the cabinet. The vertical FTA Mounting Channel has two channels (troughs), right and left.

When standard FTAs are mounted on the vertical FTA Mounting Channel, the FTA Mounting Channel is installed in its “normal” position where field wiring enters the left channel and connects to the FTAs. The cables connecting the FTAs to their associated IOP(s) or Power Distribution Assemblies are routed in the right channel of the FTA Mounting Channel.

When Galvanically Isolated FTAs are mounted on the vertical FTA Mounting Channel, the FTA Mounting Channel is installed in its “inverted” position where field wiring enters the right channel and connects to the

FTAs. The cables connecting the FTAs to their associated IOP(s) or Power Distribution Assemblies are routed in the left channel of the FTA Mounting Channel.

Galvanically Isolated FTAs and standard FTAs must not be mounted on the same FTA Mounting Channel.