Triconex 9802 32-Point Digital Input Module

Description

The Triconex 9802 is a 32-point Digital Input (DI) Module designed for the Triple Modular Redundant (TMR) safety system. It is a critical component for monitoring discrete field devices, such as limit switches, pushbuttons, and auxiliary contacts, in high-integrity safety loops. The module interfaces with the triplicated I/O bus, ensuring that every input signal is independently processed by three separate sensing circuits to maintain SIL3 safety standards.

Specifications

• Input Points: 32 points, all of which are commoned into a single group for power distribution.
• Nominal Voltage: 24 VDC (TMR discrete input).
• Input Voltage Range: 15 to 30 VDC for an "ON" state; 0 to 5 VDC for an "OFF" state.
• Input Delay: Maximum filtering time of 10 milliseconds to eliminate contact bounce and electrical noise.
• Power Consumption: Typically 3.0 Watts plus field load requirements.
• Isolation: Optically isolated to 1500 VDC between the field circuitry and the internal logic backplane.
• Point Loading: Maximum input current per point is 4.5 mA at 24 VDC.
• Status Indicators: Individual LEDs for each of the 32 points, plus Module Status LEDs (Pass, Fault, Active).

Features

• Triple Modular Redundant Sensing: Each of the 32 input signals is split into three separate legs, allowing the Main Processors to perform 2-out-of-3 (2oo3) voting on the data.
• Continuous Self-Testing: The module performs periodic "Stuck-On" and "Stuck-Off" hardware tests to detect internal component failures without affecting the process.
• Hot-Swappable Design: Supports Online Replacement, allowing a technician to pull a faulted 9802 module and insert a healthy one while the system is live.
• Comprehensive Diagnostics: Front-panel Fault and Pass LEDs provide immediate visual feedback on the health of the internal microprocessors and sensing legs.
• Sequence of Events (SOE) Support: Capable of high-resolution time-stamping for state changes, essential for analyzing the timeline of an emergency shutdown.
• Environmental Hardening: Built with a rugged chassis and optional G3 conformal coating to resist corrosion in harsh industrial atmospheres.