Product Overview

The Honeywell CC-TDI120 is a high-voltage discrete signal interface specifically developed for the Experion Process Knowledge System (PKS) Series C hardware platform. This digital input module acts as a ruggedized gateway between high-voltage field instrumentation and low-voltage control logic. It is uniquely engineered to provide dual compatibility, accepting both 120V Alternating Current (AC) and 125V Direct Current (DC) signals. By utilizing advanced optical coupling technology, the CC-TDI120 ensures that discrete state changes from switches, relay contacts, and sensors are transmitted to the DCS controller with absolute galvanic isolation and noise immunity.

Key Technical Characteristics and Hardware Parameters

Designed for maximum signal clarity and system protection, the CC-TDI120 incorporates professional-grade isolation and diagnostic feedback.

• Channel Density: 16 Electrically Isolated Discrete Inputs

• Input Voltage (AC): 90 to 132 VAC RMS (47 to 63 Hz)

• Input Voltage (DC): 100 to 138 VDC

• Galvanic Isolation: 1500 VAC RMS between field wiring and system logic

• Signal Protection: Optical isolation blocks transients, ground loops, and electromagnetic interference (EMI)

• Visual Diagnostics: Dedicated front-panel LED indicators for each channel to verify active/inactive states

• Redundancy Support: Compatible with redundant I/O configurations for high-availability process safety

• Power Dissipation: Optimized for low heat generation within standard DCS cabinets

• Physical Profile: Compact 7x14x14.5cm footprint weighing 0.4kg

• Build Quality: Manufactured in the USA for mission-critical reliability

Industrial Applications and Operational Use Cases

The CC-TDI120 is an essential component for facilities operating with high-voltage control circuits and mixed electrical architectures.

• Motor Control Centers (MCC): Interfacing with high-voltage auxiliary contacts on motor starters and circuit breakers to provide run/trip feedback to the control room.

• Power Utility Management: Monitoring discrete status signals from high-voltage switchgear and transformers where DC battery banks (125VDC) are the primary control power source.

• Refinery and Chemical Processing: Collecting data from remote limit switches and level float sensors located across expansive plant areas where voltage drops necessitate high-voltage signaling.

• Critical Safety Interlocking: Implementing redundant digital input loops for emergency shutdown systems where 120V AC/DC signal reliability is paramount for personnel protection.