ICS TRIPLEX T8461

Description

The TMR 24V DC/48V DC Digital Output Module is a member of the Trusted
range of Input/Output (I/O) Modules. All Trusted I/O Modules share common
functionality and form. At the most general level, all I/O Modules interface to
the Inter-Module Bus (IMB) which provides power and allows communication
with the TMR Processor. In addition, all Modules have a field interface that is
used to connect to Module-specific signals in the field. All Modules are Triple
Modular Redundant (TMR).
The Trusted® Triple Modular Redundant (TMR) 24V DC / 48V 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 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 onboard Sequence of Events (SOE) reporting with a
resolution of 1 ms. An output change of state triggers an SOE entry. Output
states are automatically determined by voltage and current measurements
onboard 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 TMR output channels per Module.
• Comprehensive, automatic diagnostics and self-test.
• Automatic line monitoring per channel to detect open circuit and short
circuit field wiring and load faults.
• 2500V impulse withstand opto/galvanic isolation barrier.
• Automatic overcurrent protection (per channel), no external fuses
required.
• Onboard Sequence of Events (SOE) reporting with 1 ms resolution.
• Module can be hot-replaced online using dedicated Companion
(adjacent) Slot or SmartSlot (one spare slot for many Modules)
configurations.
• Front Panel output status light-emitting diodes (LEDs) for each
channel indicate output status and field wiring faults.
• Front Panel Module status LEDs indicate Module health and
operational mode (Active, Standby, Educated).
• TϋV Certified IEC 61508 SIL 3.
• Outputs are powered in isolated groups of eight. Each such group is a
Power Group (PG).