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T9803

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T9803
May 15, 2026

T9803

The T9803 is a 16‑channel, TMR‑isolated digital input termination assembly (TA) for the AADvance T9000 safety system. It provides field wiring interface for up to three T9401 / T9402 digital input modules, supporting 24 VDC discrete safety signals in ESD, F&G, BMS and critical process safety applications. T9803 is the triple‑redundant, fully isolated counterpart to T9801 (simplex/common) and T9802 (dual/isolated), designed for maximum fault tolerance in SIL 3 safety loops.

Description

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1. Overview

The T9803 is a 16‑channel, TMR‑isolated digital input termination assembly (TA) for the AADvance T9000 safety system. It provides field wiring interface for up to three T9401 / T9402 digital input modules, supporting 24 VDC discrete safety signals in ESD, F&G, BMS and critical process safety applications.
T9803 is the triple‑redundant, fully isolated counterpart to T9801 (simplex/common) and T9802 (dual/isolated), designed for maximum fault tolerance in SIL 3 safety loops.

2. Key Features

  • 16 digital input channels, TMR, fully isolated per channel

  • Connects to 1, 2, or 3 × T9401 / T9402 DI modules (TMR mode)

  • Channel‑to‑channel & field‑to‑backplane isolation (reinforced)

  • Per‑channel hot‑swappable fuses (500 mA, no module removal)

  • Input voltage: 18–32 VDC (nominal 24 VDC)

  • SIL 3 capable (IEC 61508, TÜV certified system)

  • TMR fault tolerance: single‑channel/module faults do not trip safety function

  • Field fault detection: open, short, overvoltage, ground fault

  • LED status per channel (front‑panel visible)

  • Conformal coated for harsh environments

  • Mounts to T9300 I/O base (3‑way) or T9100 chassis

  • Hot‑swap compatible (online replacement without system shutdown)

3. Electrical Specifications

Input

  • Channels: 16, TMR, fully isolated, per‑channel isolated

  • Voltage range: 18–32 VDC (24 VDC nominal)

  • Logic threshold:

    • Logic 1 (ON): ≥ 18 VDC

    • Logic 0 (OFF): ≤ 5 VDC

  • Input current: ~6.5 mA per channel @ 24 VDC

  • Fuse: 500 mA, Type T, Littelfuse, per channel, hot‑swappable

Isolation

  • Field‑to‑backplane: ±1.5 kVDC, 1 minute, reinforced

  • Channel‑to‑channel: Isolated (no common ground)

Backplane / Interface

  • Supply: 18–32 VDC (redundant)

  • Max current: 400 mA

  • Power dissipation: ≤ 5 W (17.1 BTU/h)

4. Mechanical

  • Form: Single‑width 6U TA (extended for TMR)

  • Dimensions: 132 mm × 126 mm (5¼ in × 5 in)

  • Weight: ~360 g (13 oz)

  • Terminals: Screw terminals (field wiring, 16 AWG max)

  • Fuse access: Front‑panel, per‑channel

  • Mounting: T9300 I/O base (3‑way) or T9100 chassis

5. Environmental

  • Operating temperature: −40 °C to +70 °C

  • Storage: −40 °C to +85 °C

  • Humidity: 5–95 % RH, non‑condensing

  • Pollution degree: PD2

  • Protection: Conformal coated

6. Safety & Approvals

  • IEC 61508 SIL 3 (system‑level, TÜV certified)

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

7. Compatibility & Ordering

Compatible Modules

  • T9401: 16‑Ch Digital Input (Simplex)

  • T9402: 16‑Ch Digital Input (Dual/TMR)

Ordering Information

  • T9803: 16‑Ch Digital Input TA, TMR, Isolated

  • T9300: 3‑Way I/O Base Unit

  • T9401 / T9402: Digital Input Modules


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