Rockwell Automation T8448 Trusted TMR Zone Interface Module - 40 Channel - Manual

Trusted TM
PD-T8448
Issue 14 Apr 10 PD-T8448 1
Trusted
TM
TMR Zone Interface
Module – 40 Channel
Introduction
The Trusted TM TMR Zone Interface module has been designed to provide a configurable interface
specifically for use in Fire and Gas protection systems. The module interfaces to up to 40 Fire and
Gas field device inputs or actuators. Each of the 40 I/O Channels can be individually configured as
Analogue Input, Digital Input or Digital Output to provide all of the interfaces needed to protect one or
more Fire and Gas Zones. Interfacing to the field devices is through a Versatile Field Termination
Assembly type 8842, which provides the field loop conditioning for each of the types of signal, and
enables the connection of reset signals for latching type detectors without the need for external
hardware. The module is separated into 5 power groups each with 8 channels. Power groups can be
combined together to provide a configurable number of channels for each Fire/Gas Zone. All of these
functions provide data to the Trusted
TM TMR system which acts as the logic solver.
Triplicated diagnostic tests are performed throughout the module, including measurements for current
and voltage on each portion of voted input or output channels. Tests are also performed for stuck on
and stuck off failures. All inputs are treated as analogue and are fully tested. Fault tolerance is
achieved through a Triple Modular Redundant (TMR) architecture within the module for each of the 40
channels.
Features
• 40 Triple Modular Redundant selectable input/output points per module.
• Inputs interface to 4-20mA gas detectors, Fire and Heat detectors, Break Glass units etc.
• Programmable Field Device Reset signals (up to 5 individual resets)
• Two or Three Wire Field devices through 8842
• Fuse Protection of Inputs and Outputs through 8842
• High Power Digital Outputs to interface to Dampers, Extinguishant Release, Fire pumps
etc.
• 5 Isolated Power Groups to allow flexible and efficient field configurations.
• Comprehensive automatic diagnostics and self-test.
• Automatic line monitoring per point to detect faults in field wiring and loads.
• 2500V dc optical isolation barrier.
• Automatic over-current protection (per channel), no module 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.
• TÜV Certified IEC 61508 SIL 3