ICS TRIPLEX T8431 Trusted TMR Analog Output Module

The ICS TRIPLEX T8431 Trusted® TMR 24 Vdc Analog Input Module is a high-reliability component for interfacing with 40 sourcing field input devices. Designed for fault tolerance, it incorporates Triple Modular Redundant (TMR) architecture for each input channel. The module provides advanced diagnostics, including automatic line monitoring to detect open and short circuits, as well as on-board Sequence of Events (SOE) reporting for precise state tracking.

Key Features

Triple Modular Redundancy: TMR architecture ensures fault tolerance for all 40 input channels.
Comprehensive Diagnostics: Automated diagnostics include self-tests and line monitoring for open/short circuit detection.
Opto/Galvanic Isolation: 2500 V impulse withstand for robust electrical isolation.
SOE Reporting: Resolution of 1 ms for event tracking and timestamp accuracy of ±10 ms.
Hot Replacement: Modules can be replaced online using Companion Slot or SmartSlot configurations.
Front Panel Indicators:
- Channel LEDs display input status and field wiring faults.
- Status LEDs indicate module health and operational mode.
TÜV IEC 61508 SIL 3 Certified: High safety integrity level for demanding applications.

Specifications

Electrical Characteristics

Backplane (IMB) Supply:
- Voltage: 20 Vdc to 32 Vdc
- Power Dissipation: 20 W
Field Supply: Not applicable
Input Characteristics:
- Current: 0 mA – 22 mA
- Voltage: 0 Vdc – 5.5 Vdc
- Impedance (FTA): 250 Ohm
- Impedance (Module): 16.967 kΩ (halved if partner modules are installed)
Thresholds and Accuracy:
- Configurable thresholds
- Safety Accuracy: ±200 μA
- Calibration Accuracy: ±0.15%

Environmental Specifications

Operating Temperature: 0 °C to +60 °C (+32 °F to +140 °F)
Storage Temperature: -25 °C to +70 °C (-13 °F to +158 °F)
Relative Humidity: 10% – 95%, non-condensing

Dimensions and Weight

Height: 266 mm (10.5 in)
Width: 31 mm (1.2 in)
Depth: 303 mm (12.0 in)
Weight: 1.149 kg (2.5 lb)

Sequence of Events (SOE)

Event Resolution: 1 ms
Timestamp Accuracy: ±10 ms

Safety and Certifications

Isolation:
- Field Common: 50 V reinforced
- 250 V basic insulation tested at 2436 Vdc for 60 seconds
Intrinsic Safety: External barrier required
Certifications: TÜV IEC 61508 SIL 3

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