Rockwell Automation T8423 Trusted TMR 35 - 120 Vdc Digital Input Module - Manual

Trusted TM
PD-T8423
Issue 15 Apr 10 PD-T8423 1
Trusted
TM
TMR 35 – 120 Vdc Digital Input
Module – 40 Channel
Introduction
The Trusted TM TMR 120V 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.
• 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)
• T 5 V Certified IEC 61508 SIL 3