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T8432C

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T8432C
May 15, 2026

T8432C

The T8432C is a conformal coated, 60‑channel TMR analogue input module for the Trusted T8000 Safety Instrumented System (SIS). It is the harsh‑environment coated variant of T8432, providing extended temperature tolerance and improved protection against humidity, dust, and corrosive gases in safety‑critical applications. It offers triple modular redundant (TMR) analogue signal acquisition for 0–22 mA current and 0–6 VDC voltage inputs, supporting pressure, temperature, flow, and level transmitters in oil & gas, petrochemical, power, and process safety systems.

Description

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1. Introduction

The T8432C is a conformal coated, 60‑channel TMR analogue input module for the Trusted T8000 Safety Instrumented System (SIS). It is the harsh‑environment coated variant of T8432, providing extended temperature tolerance and improved protection against humidity, dust, and corrosive gases in safety‑critical applications.
It offers triple modular redundant (TMR) analogue signal acquisition for 0–22 mA current and 0–6 VDC voltage inputs, supporting pressure, temperature, flow, and level transmitters in oil & gas, petrochemical, power, and process safety systems.

  • Function: 60‑channel isolated analogue input (mA / VDC)

  • Architecture: Fully triplicated TMR (3‑2‑0 fault tolerant)

  • Safety: IEC 61508 SIL 3

  • Coating: Conformal coated (moisture / dust / corrosion protection)

  • Operating Temp: –5 °C to +60 °C (extended range)

  • Inputs: 0–22 mA / 0–6 VDC (per‑channel configurable)

  • Resolution: High‑precision sigma‑delta ADC

  • Safety Accuracy: ±1% full scale

  • Isolation: 2500 VDC optical isolation (field‑to‑system)

  • SOE: 1 ms time‑stamp resolution

  • Hot‑swap: Supported

  • Diagnostics: Per‑channel open/short/range fault detection

2. Product Overview

The T8432C is a single‑width, 6U TMR analogue input module with conformal coating for harsh industrial environments. It installs in T8100 / T8400 chassis and provides 60 independent, galvanically isolated analogue input channels, each with three redundant measurement paths and 1oo2D fault voting.
Key features:

  • 60 channels isolated analogue input (0–22 mA / 0–6 VDC)

  • Conformal coated PCB assembly (improved resistance to moisture, dust, chemical vapors)

  • Extended operating temperature: –5 °C to +60 °C

  • Triple Modular Redundancy (TMR) with HIFT architecture

  • Per‑channel open/short‑circuit and over/under‑range detection

  • 2500 VDC optical isolation per channel

  • 1 ms resolution SOE logging

  • Hot‑swap capable

  • Front‑panel LED status indicators

  • Compatible with T8100 / T8400 chassis

  • High density: 60 channels in single‑width 6U form factor

3. Specifications

3.1 Mechanical

  • Form Factor: T8000 chassis single‑width module, 6U height

  • Dimensions (H × W × D): 266 mm × 31 mm × 303 mm

  • Weight: Approx. 1.2 kg

  • Mounting: T8100 / T8400 chassis slots 1–16

  • Terminals: Front‑panel screw terminals (60 channels)

  • Coating: Conformal coated (PCB and components protected)

3.2 Electrical

  • System Supply: 20–32 VDC (nominal 24 VDC)

  • Power Consumption: 18–22 W

  • Input Ranges (per channel configurable):

    • Current: 0–22 mA

    • Voltage: 0–6 VDC

  • Resolution: Sigma‑delta ADC, high precision

  • Safety Accuracy: ±1% full scale

  • Isolation: 2500 VDC optical barrier (field‑to‑system)

  • Channel Crosstalk: –40 dB typical

  • Update Time: ≤ 1 ms per channel

3.3 Functional

  • Redundancy: TMR (three independent slices)

  • Voting: 1oo2D per channel

  • Diagnostics:

    • Open‑circuit detection

    • Short‑circuit detection

    • Over‑/under‑range detection

    • On‑board BIST (periodic self‑test)

  • SOE Resolution: 1 ms

  • Response Time: ≤ 2 ms

  • Data Integrity: BER < 10⁻¹²

3.4 Environmental (Key Difference from T8432)

  • Operating Temperature: –5 °C to +60 °C (T8432: 0 °C to +60 °C)

  • Storage Temperature: –25 °C to +70 °C

  • Humidity: 10–95 % RH, non‑condensing

  • Vibration: IEC 60068‑2‑6 compliant (1 g, 10–150 Hz)

  • Shock: IEC 60068‑2‑27 compliant (15 g, 11 ms)

  • Protection: Conformal coating against dust, moisture, corrosive gases

3.5 Safety & Certification

  • Safety Standard: IEC 61508 SIL 3

  • Approvals: CE, UL, CSA, ATEX, IECEx

  • Fault Tolerance: TMR (3‑2‑0)

  • PFHd: < 1.0 × 10⁻⁹ / hour (SIL 3)

4. Front Panel Indicators

  • PWR (Green): ON = module power healthy

  • RUN (Green): ON = active; FLASHING = BIST/initialization

  • FAULT (Red): ON = critical fault; FLASHING = minor fault

  • COM (Green): FLASHING = backplane communication active

  • CH1–CH60 LEDs: Reflect input status / fault per channel

5. Installation

  • Chassis: Insert into any vacant slot in T8100 / T8400 chassis

  • Hot‑Swap: Supported; no system shutdown required

  • Front‑Panel Screws: Torque 0.8–1.0 Nm

  • Environment: Suitable for humid, dusty, or mildly corrosive locations

6. Wiring

  • Signal Types: 4–20 mA / 0–20 mA / 0–6 VDC

  • Field Connection:

    • mA: Transmitter + → channel +; transmitter – → channel –

    • VDC: Signal + → channel +; signal – → channel –

  • Wire Gauge: 16–22 AWG stranded

  • Terminal Torque: 0.5–0.6 Nm

7. Operation

  • Power‑Up: PWR ON; RUN flashes during BIST (5–10 s)

  • Normal: PWR/RUN steady green; FAULT OFF; COM flashing

  • Faults:

    • FAULT ON: TMR mismatch, short circuit, overrange

    • FAULT FLASHING: Single‑path fault, minor mismatch

  • SOE: All analogue threshold crossings time‑stamped at 1 ms

8. Ordering Information

  • T8432: Standard 60‑ch TMR analogue input (0 °C to +60 °C)

  • T8432C: Conformal coated, –5 °C to +60 °C (harsh environment)

  • TC‑T8432: Terminal cable kit

  • T8100 / T8400: Trusted chassis


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