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Rockwell Automation T8403 Trusted 24V dc Digital input Module - 40 Channel User Manual

Tmr 24v dc digital input module – 40 channel, Introduction, Trusted

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Trusted

TM

PD-T8403

Issue 15 Jun 13

PD-T8403

1

Trusted

TM

TMR 24V dc Digital Input

Module – 40 Channel

Introduction

The Trusted

TM

TMR 24V dc Digital Input module interfaces to 40 field input devices. Fault tolerance is

achieved through a Triple Modular Redundant (TMR) architecture within the module for each of the 40
input channels.

Each field input is triplicated and the input voltage is measured using a sigma-delta input circuit. The
resulting field voltage measurement is compared to user configurable threshold voltages to determine
the reported field input state. When a line-monitoring device is installed at the field switch, the module
can detect open and short-circuit field cables. Line monitoring functions are independently configured
for each input channel. The triplicated voltage measurement, coupled with on-board diagnostic testing,
provides comprehensive fault detection and tolerance.

The module provides on-board Sequence of Events (SOE) reporting with a resolution of 1ms. A
change of state triggers an SOE entry. States are determined by voltage thresholds that can be
configured on a per channel basis.

Features

• 40 Triple Modular Redundant (TMR) input channels per module.

• Comprehensive, automatic diagnostics and self-test.

• Selectable line monitoring per channel to detect open circuit and short circuit field wiring

faults.

• 2500V dc optical isolation barrier.

• On-board Sequence of Events (SOE) reporting with 1ms resolution.

• Configurable 50/60Hz digital filtering to eliminate field induced noise.

• Module can be hot-replaced on-line using dedicated Companion (adjacent) Slot or SmartSlot

(one spare slot for many modules) configurations.

• Front panel input status LEDs for each channel indicate input status and field wiring faults.

• Front panel module status LEDs indicate module health and operational mode (Active,

Standby, Educated)

• TϋV Certified IEC61508 SIL 3