T8461 ICS TRIPLEX T8461 The TrustedTM TMR 24/48V dc Digital Output
module T8461
ICS TRIPLEX T8461
The TrustedTM TMR 24/48V dc Digital Output module
The TrustedTM TMR 24/48V dc Digital Output module interfaces to 40
field output devices. Outputs are arranged in five groups of eight.
All outputs in a group share a common power source and return.
Fault tolerance is achieved through Triple Modular Redundancy (TMR)
within the same module for each of the 40 output channels.
The module provides on-board Sequence of Events (SOE) reporting
with a resolution of 1ms. The “event”is the actual sensing of the
field device loop current.
Each triplicated section (slice) of the module, receives output
instructions from the TrustedTM TMR Processor and sends its data to
an internal safety layer hardware voter. Each slice uses the voted
data to control the outputs. Every output channel consists of a
six-element voted array. The output switch array provides fault
tolerant, uninterrupted control under an output switch failure
condition. Output switching and fault diagnostics comply with the
demanding requirements of IEC- 61508 SIL-3 for First Fault - Fault
Tolerant, and Second Fault - Fail Safe outputs.
FEATURES
- 40 TMR output channels per module
- Five isolated groups of eight outputs each
- Six-element voted output array
- Comprehensive diagnostics and self-test
- First fault – Fault Tolerant, Second fault – Fail Safe
- Line monitoring on a per channel basis Automatic over-current
protection no fuses required
- 2500V dc Opto-Isolation
- Hot replaceable
- Front panel status LEDs for each channel
- Module fault and status indicators
- IEC 61508, SIL 3 safety applications
- On-board 1ms resolution Sequence of Events reporting
ELECTRICAL SPECIFICATION
Number of Outputs 40 Channels
No. of Independent Power Groups 5, each of 8outputs
Output Turn On/Off Delay 0.5ms
Self-Test Interval 2 minutes
Intrinsic Safety External barrier
Dimensions (HxWxD): 241mm x 30mm x 300mm (9.5ins x 1.2ins x
11.8ins)
Weight: 1.13kg (2.5lbs)
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