Rockwell Automation T8451 Trusted TMR 24V dc Digital Output Module - 40 Channel - Manual

Trusted TM
PD-T8451
Issue 12 Apr 10 PD-T851 1
Trusted
TM
TMR 24Vdc Digital Output
Module – 40 Channel
Introduction
The Trusted TM TMR 24V dc Digital Output module interfaces to 40 field devices. Triplicated diagnostic
tests are performed throughout the module including measurements for current, and voltage on each
portion of the voted output channel. Tests are also performed for stuck on and stuck off failures. Fault
tolerance is achieved through a Triple Modular Redundant (TMR) architecture within the module for
each of the 40 output channels.
Automatic line-monitoring of the field device is provided. This feature enables the module to detect
both open and short circuit failures in field wiring and load devices.
The module provides on-board Sequence of Events (SOE) reporting with a resolution of 1ms. An
output change of state triggers an SOE entry. Output states are automatically determined by voltage
and current measurements on board the module.
This module is not approved for direct connection to hazardous areas and should be used in
conjunction with Intrinsic Safety Barrier devices.
Features
• 40 Triple Modular Redundant (TMR) output points per module.
• Comprehensive, automatic diagnostics and self-test.
• Automatic line monitoring per point to detect open circuit and short circuit field wiring and
load faults.
• 2500V dc optical isolation barrier.
• Automatic over-current protection (per channel), no fuses required.
• 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 output status LEDs for each point indicate output status and field wiring faults.
• Front panel module status LEDs indicate module health and operational mode (Active,
Standby, Educated)
• T 6 V Certified IEC 61508 SIL 3
• Outputs are powered in isolated groups of eight.