Honeywell DCS-51304337-150MC-TAIH12 – 12‑Channel Temperature Analog Input for Thermocouples in DCS/Experion Systems

The Honeywell DCS-51304337-150MC-TAIH12 (often referred to as TAIH12) is a temperature analog input module designed for Honeywell distributed control systems. From my experience, it’s the go-to card when you need reliable, multi-channel thermocouple acquisition on legacy TDC 3000 and many Experion PKS Series A/B I/O installations. It typically handles standard thermocouple types with cold-junction compensation and software linearization, which makes it a solid drop-in for brownfield upgrades or like-for-like spares.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days from delivery
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express delivery: FedEx, UPS, DHL

Key Features

• 12 thermocouple inputs – Suits multi-point temperature monitoring on heaters, reactors, exchangers, and furnaces.
• Multi-type TC support – Typically supports J, K, T, E, N, S, R, B; simplifies mixed-sensor plants.
• Cold-junction compensation – Stabilizes readings across ambient drift; better long-term stability.
• Software linearization – DCS-side linearization curves for accurate engineering units.
• Backplane integration – Communicates via the Honeywell I/O backplane; no external comms wiring.
• MC variant – The “MC” suffix seems to indicate a conformal-coated build, useful in humid or corrosive atmospheres.
• Field wiring via IOTA – Works with Honeywell I/O termination assemblies (IOTA), easing swap-outs and maintenance.

Technical Specifications

Application Fields

You might notice this module most often in thermal applications where accuracy and channel density matter. Typical uses include:

• Refining and petrochemicals – furnace zone monitoring, reformer outlet temperature, catalyst beds
• Chemicals and pharma – reactor jackets, batch vessels, incubators
• Power generation – boiler tube skin, superheater/reheater thermocouples
• Metals and glass – kiln and annealing lines, melting furnaces
• Food & beverage – thermal tunnels, pasteurization, CIP temperature tracking

Advantages & Value

• Lifecycle continuity – Compatible with installed Honeywell DCS/Experion I/O families, so no re-engineering of loops.
• Stable readings – Cold-junction compensation and linearization reduce drift across seasons.
• Spares efficiency – One card covers multiple TC types, which cuts spare stock variety.
• Time-to-recover – From my experience, swap-outs are quick with IOTA wiring left undisturbed.
• Protected build – The MC-coated variant is a safer bet in high humidity or light corrosive atmospheres.

Customer feedback we hear a lot: “Channel stability looks better after we moved mixed K/J thermocouples onto a single TAIH12 and used proper CJC placement.” It’s a small setup detail that, in many cases, pays back in trending quality.

Installation & Maintenance

• Panel standards – Install in a Honeywell-approved I/O rack with adequate ventilation; avoid mounting near high-heat sources.
• Wiring – Use the correct thermocouple extension wire and observe polarity; keep shield drain to a single-point ground.
• CJC placement – Ensure the IOTA’s cold-junction sensors are not exposed to drafts or heat sources inside the cabinet.
• Separation – Route TC leads away from high-current drives and solenoid bundles; twisted, shielded pairs recommended.
• Maintenance – Periodically verify calibration against a reference channel; clean dust from card edges and rack fans.
• Firmware/config – If your DCS revision supports it, keep I/O definitions and linearization tables backed up; apply updates during scheduled outages.
• Hot replacement – Replacement is typically possible under controlled procedures; follow Honeywell guidelines to avoid nuisance alarms.

Quality & Certifications

• Manufacturer quality system: ISO 9001 (Honeywell manufacturing sites are typically ISO-certified)
• Regulatory: CE compliant for EMC/safety; many variants are UL Recognized
• Environment: RoHS compliance varies by vintage; MC variant provides conformal coating for environmental protection
• Warranty: 365 days standard

Compatible/Supporting Components

• Honeywell IOTA termination assemblies for TAIH series (field wiring landing)
• Honeywell I/O racks/backplanes for Series A/B and compatible Experion/TDC installations
• Shielded TC extension cables and approved CJ sensors