T8871 ICS Triplex PLC Module Input For Automation System

ICS Triplex T8871 PLC Module Input

The module is supplied with a dual redundant +24 Vdc power feed from the chassis backplane. An on-board power supply unit provides voltage conversion, supply conditioning and protection.

The Trusted CI communicates with the Trusted TMR Processor via the triplicated InterModule Bus. When polled by the Trusted TMR Processor, the module’s bus interface votes the data 2 out of 3 (2oo3) from the Inter-Module Bus and transmits back its reply via all three Inter-Module Bus channels. The remainder of the Communications Interface is simplex.

The Trusted CI provides the Trusted System with an intelligent Communications Interface, acting as a relay between the Processor, other Trusted Systems, the Engineering Workstation and third-party equipment.

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