Rockwell-automation T8423 Trusted TMR 35 - 120 Vdc Digital Input Modul Uživatelský manuál stáhnout pdf (Strana 9)

Trusted

Module T8423

Issue 15 Apr 10 PD-T8423 9

Figure 2 shows a simplified functional block diagram of the Trusted

120Vdc Digital input module.

Figure 2 Functional Block Diagram

1.1. Field Termination Unit (FTU)

The Field Termination Unit (FTU) is the section of the I/O module that connects all three FIUs to a

single field interface. The FTU primarily contains passive components necessary for front-end signal

conditioning, field signal over-voltage protection, and EMI/RFI filtering. When installed in a Trusted

Controller or Expander Chassis, the FTU field connector interconnects to the I/O cable assembly

attached at the rear of the chassis.

The SmartSlot link is passed from the HIU to the field connections via the FTU. These signals go

directly to the I/O cable assembly and maintain isolation from the I/O signals on the FTU. The

SmartSlot link is the intelligent connection between active and standby modules for co-ordination

during module replacement.

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Rockwell-automation T8423 Trusted TMR 35 - 120 Vdc Digital Input Modul Uživatelský manuál Strana 9