Rockwell Automation T8431 Trusted TMR 24Vdc Analogue Input Module - 40 Channel - Manual (Page 9)

Trusted
TM
Module T8431
Issue 16 Sep 11 PD-T8431 9
1.4. Front Panel Unit (FPU)
The Front Panel Unit (FPU) comprises a Front Panel Termination Unit (FPTU) and a Front Panel
Display Unit (FPDU). The overall FPU contains the necessary connectors, switches, logic, and LED
indicators for the front panel. For every type of Trusted
TM I/O module, the FPU contains the Slice
Healthy, Active/Standby and Educated indicators (LEDs), and the module removal switches.
Additional bicolour LEDs provide status indication for the individual I/O signals. Serial data interfaces
connect the FPU to each of the HIU slices to control the LED status indicators and monitor the module
removal switches.