T8461 ICS TRIPLEX T8461 The TrustedTM TMR 24/48V dc Digital Output module T8461

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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