Honeywell 2MLI-A21C-CC Analog Input Module – Experion PKS / TDC 3000 Series
When a critical analog input module fails on a continuous process line — whether in a refinery, chemical plant, or power generation facility — every minute of unplanned downtime translates directly into lost production and safety risk. The Honeywell 2MLI-A21C-CC is the precision analog input module that keeps your distributed control system reading field signals accurately and reliably, ensuring your process stays within safe operating parameters around the clock.
The 2MLI-A21C-CC occupies a well-established position within Honeywell’s TDC 3000 and Experion PKS control architecture. As a multi-channel analog input card designed for high-density I/O cabinets, it has earned a reputation for long-term stability in mission-critical installations across the global process industries. Its continued demand in the MRO and spare-parts market reflects the enormous installed base of Honeywell DCS systems operating worldwide.
Technical Specifications
- Part Number: 2MLI-A21C-CC
- Manufacturer: Honeywell Process Solutions
- Series: TDC 3000 / Experion PKS
- Module Type: Analog Input Module
- Form Factor: Card / Board module for standard Honeywell I/O chassis
- Signal Type: Analog input (4–20 mA / voltage signal compatible per system configuration)
- Communication: Honeywell proprietary backplane bus
- Operating Temperature: 0°C to 60°C (standard industrial range)
- Condition Available: New surplus / Refurbished / Used tested
Note: Detailed electrical specifications should be verified against the official Honeywell product datasheet for your specific system revision. Konmask does not fabricate or alter manufacturer specifications.
Key Features & Benefits
- Drop-in Replacement: Direct form-fit-function replacement for existing TDC 3000 and compatible Experion PKS I/O racks — no re-engineering required.
- High Signal Integrity: Designed for accurate analog signal acquisition in electrically noisy industrial environments.
- Long Service Life: Built to Honeywell’s industrial-grade standards for continuous 24/7 operation in process control applications.
- Broad Compatibility: Integrates seamlessly with Honeywell’s Universal Control Network (UCN) and associated I/O link architecture.
- MRO-Ready: Widely stocked as a critical spare to minimize mean time to repair (MTTR) during unplanned outages.
- Tested Before Shipment: All units sourced by Konmask.com undergo functional verification prior to dispatch.
Industry & Equipment Applications
- Oil & Gas: Upstream wellhead control, midstream pipeline monitoring, downstream refinery process control.
- Petrochemical & Chemical: Reactor temperature and pressure loop control, batch process management.
- Power Generation: Boiler control systems, turbine monitoring, plant-wide DCS integration.
- Pulp & Paper: Continuous process line control and quality measurement loops.
- Pharmaceuticals: GMP-compliant process monitoring where signal accuracy is regulatory-critical.
- Water & Wastewater: Flow, level, and pressure measurement in treatment plant automation.
System Integration & Compatible Parts
The 2MLI-A21C-CC is designed for use within Honeywell’s TDC 3000 and Experion PKS distributed control system families. Compatible and commonly paired components include:
- Honeywell TDC 3000 I/O Link modules and HPM (High-Performance Process Manager)
- Honeywell Experion PKS C200 / C300 controllers
- Honeywell LLMUX (Low-Level Multiplexer) assemblies
- Associated field termination assemblies (FTAs) and I/O chassis
- Honeywell UCN coaxial cable and network interface modules
Contact our technical team to confirm compatibility with your specific system revision and firmware version before ordering.
Our Quality Assurance Process
At Konmask.com, every industrial automation component goes through a structured quality verification process before it reaches you:
- Visual Inspection: Check for physical damage, corrosion, and component integrity.
- Functional Test: Power-on and signal-path verification where test equipment is available.
- Authenticity Screening: Cross-reference part markings, date codes, and manufacturer labels against known-good references.
- Secure Packaging: ESD-safe anti-static packaging with moisture barrier for international shipment.
- Documentation: Test report and shipping documentation provided upon request.
How to Order
- Submit an Inquiry: Use the contact form on this page or email support@konmask.com with your required quantity and delivery timeline.
- Receive a Quote: Our team will respond within 1 business day with pricing, availability, and lead time.
- Confirm & Pay: We accept T/T (bank transfer), PayPal, and other B2B payment methods. Proforma invoice provided.
- Shipment & Tracking: Parts are shipped via DHL, FedEx, or UPS with full tracking. Export documentation included.
- After-Sales Support: Our engineers are available post-delivery to assist with installation questions.
Why Choose Konmask.com?
- ✅ Specialized in Industrial Automation: We focus exclusively on PLC, DCS, and industrial control components — not a general electronics marketplace.
- ✅ Global B2B Supply: Serving engineering teams, MRO buyers, and system integrators in 30+ countries.
- ✅ Hard-to-Find Parts: We stock obsolete and long-lead-time Honeywell modules that OEM channels no longer supply.
- ✅ Technical Expertise: Our team includes experienced control system engineers who understand your application.
- ✅ Fast Response: Inquiry-to-quote in under 24 hours. Emergency sourcing available.
- ✅ Transparent Sourcing: We disclose part condition (new surplus, refurbished, or used-tested) clearly on every order.
Frequently Asked Questions
Q: Is the Honeywell 2MLI-A21C-CC still in production?
A: This module is part of the legacy TDC 3000 product line. Honeywell has transitioned newer installations to Experion PKS, but the 2MLI-A21C-CC remains in active use at thousands of installed sites globally. Konmask.com sources new surplus and refurbished units to support ongoing MRO requirements.
Q: Can this module be used in an Experion PKS system?
A: The 2MLI-A21C-CC is associated with the TDC 3000 I/O architecture. Compatibility with specific Experion PKS configurations depends on your system’s I/O link type and chassis. Please contact our technical team with your system details for confirmation.
Q: What condition are the units you supply?
A: We supply new surplus (unused, original packaging where available), professionally refurbished, and used-tested units. Condition is clearly stated in your quotation. All units are functionally verified before shipment.
Q: Do you provide a warranty?
A: Yes. We offer a standard 90-day warranty covering functional defects on all shipped units. Extended warranty options are available — please inquire when requesting a quote.
Q: How quickly can you ship?
A: In-stock units typically ship within 1–3 business days of payment confirmation. International express delivery (DHL/FedEx) to most destinations takes 3–7 business days.
Q: Can you supply multiple units for a plant-wide spare parts program?
A: Absolutely. We regularly fulfill bulk MRO orders for plant operators and EPC contractors. Contact us with your full BOM for a consolidated quote.
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