Product Overview

The Honeywell TC-MDP081 (part number 51404351-125) is a specialized 8-point isolated pulse input module engineered for the Experion® Process Knowledge System (PKS) architecture. This high-performance I/O component is designed to capture and process high-speed pulse signals from field instrumentation such as flow meters, tachometers, and displacement sensors. By providing localized signal processing and galvanic isolation, the TC-MDP081 ensures that high-frequency pulse data is accurately integrated into the Distributed Control System (DCS) without compromising the integrity of the central processing logic.

As a member of the "TC" series, this module features a standard hardware finish (non-conformal coated), making it suitable for controlled industrial environments where protection against corrosive atmospheres is not the primary requirement. Its 8-point density allows for efficient rack utilization while maintaining independent channel isolation to prevent cross-channel interference and ground loop issues.

Key Technical Characteristics and Functionality

The TC-MDP081 is built for precision signal acquisition in complex automated environments.

• 8-Point Galvanic Isolation: Each of the eight pulse input channels is electrically isolated, protecting the system backplane from field-side voltage transients and ensuring signal purity.

• Multi-Voltage Compatibility: Engineered to interface with diverse sensing technologies, the module supports standardized input thresholds including 1.2VDC, 5.1VDC, and 24VDC logic levels.

• High-Speed Pulse Acquisition: Optimized for high-frequency signal processing, making it ideal for measuring rotational speed, volumetric flow, and discrete totalization.

• Experion PKS Integration: Seamlessly interfaces with Series C or Chassis-based I/O environments, allowing for real-time data multi-dropping and deterministic communication across the control network.

• Flexible Power Interfacing: Capable of handling low-current sensing (down to 0.002A at 24VDC) as well as higher load logic (up to 0.5A at 5.1VDC) to accommodate varied field device requirements.

• Durable Chassis Design: Housed in a compact, industrial-grade enclosure (6.9x14.1x14.5cm) designed for secure installation in standard Honeywell I/O racks.

Technical Specifications

• Manufacturer: Honeywell

• Model Number: TC-MDP081

• Part Number: 51404351-125

• Module Type: Isolated Pulse Input Module

• Channel Count: 8 Points

• Coating Specification: TC (Non-conformal coated)

• Dimensions: 6.9 x 14.1 x 14.5 cm

• Unit Weight: 0.46 kg

• HS Code: 8537101190

• System Platform: Experion PKS DCS

• Condition: Brand New

Industrial Applications

The Honeywell TC-MDP081 is a fundamental component for process industries requiring precise counting and speed monitoring:

• Oil & Gas Midstream: High-accuracy flow totalization for pipeline monitoring and custody transfer interfaces.

• Power Generation: Monitoring turbine rotational speed (RPM) and auxiliary pump pulse outputs for governor control.

• Chemical Processing: Tracking material dosing through pulse-based positive displacement flow meters.

• Water & Wastewater: Supervising high-volume flow sensors and pulse-output telemetry equipment in distribution nodes.