Description

MTL HTP‑SC32 HART Connection Unit

Technical Specifications

• Product Model: HTP‑SC32
• Brand: MTL (Eaton)
• Warranty: One Year
• Input Voltage: 24 VDC (18‑30 VDC), typical consumption 3.6 W
• Operating Temperature: 0 °C ~ +60 °C cabinet‑mount
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: HART signal processing＜1 ms; loop update consistent with 4‑20 mA field instrument
• Protection Class: IP20, pollution degree 2 for indoor cabinet installation
• Accuracy Class: HART signal transmission ±0.1% FS for analog loop
• Supported Protocol: HART 5 / HART 7 protocol compliant
• Rated Channel: Maximum 32 HART instrument channels per unit
• Physical Interface: Screw‑clamp field terminals; dual RS‑485 commissioning ports for daisy‑chain cascading
• Diagnostics: Module power‑status LED indicators; loop fault detection feedback
• Isolation: Galvanic isolation between field instrument loops and host communication side
• Mounting: Standard DIN‑rail mounting
• Dimensions / Weight: 145 mm × 82 mm × 35 mm; approx 0.50 kg
• 

Product Overview

The HTP‑SC32 is a multi‑channel HART connection unit manufactured by MTL, designed to extract HART digital superimposed signals from standard 4‑20 mA analog instrument loops. It allows engineering tools, asset‑management systems and DCS to read HART device variables, diagnostic data and parameter settings without interfering with the base analog control signal. It supports up to 32 field HART transmitters, working with both analog input and compatible analog output channels. Dual RS‑485 ports support cascading multiple HTP‑SC32 units to expand channel capacity for large‑scale I/O rooms. This unit simplifies HART integration for process‑control cabinets, eliminating complex custom wiring for smart instrument maintenance. It delivers stable performance in dusty, heavy‑EMI refinery, chemical‑plant and power‑plant cabinet environments.

This HART connection unit addresses smart‑instrument management challenges: high‑density multi‑channel HART signal tapping, daisy‑chain expandable layout, no disturbance to 4‑20 mA control loop, drop‑in spare‑part compatibility for legacy HTP‑SC32 retrofit‑maintenance projects. Instrument and DCS automation engineers, process‑plant maintenance technicians and retrofit integrators benefit most. Typical applications: chemical‑plant smart‑transmitter asset management, refinery control‑room HART signal collection, water‑treatment‑plant intelligent instrument monitoring cabinets