Honeywell 2MLI-D24B-CC – 24VDC Digital Input Module | Experion PKS / TotalPlant Solution
Engineering Background: The 2MLI-D24B-CC is a 24 VDC discrete input module designed for Honeywell’s Experion PKS (Process Knowledge System) and legacy TotalPlant Solution (TPS) distributed control architectures. It serves as the primary field-signal acquisition layer, converting 24 VDC dry-contact or wet-contact field signals into digital process data for the controller backplane.
Product Positioning: Purpose-built for process industries requiring high-density, high-reliability discrete input acquisition — including refining, petrochemical, power generation, and pharmaceutical manufacturing. The module integrates directly into Honeywell’s C200/C300 controller chassis and is fully compatible with Honeywell’s FDM (Field Device Manager) diagnostics ecosystem.
Complete Technical Specifications
- Part Number: 2MLI-D24B-CC
- Manufacturer: Honeywell Process Solutions
- Platform: Experion PKS / TotalPlant Solution (TPS)
- Module Type: Digital Input (DI)
- Input Voltage: 24 VDC
- Input Configuration: Discrete (dry contact / wet contact)
- Channel Count: 32 channels (16 per group, 2 groups)
- Input Signal Range: 0–30 VDC
- ON State Threshold: ≥ 11 VDC
- OFF State Threshold: ≤ 5 VDC
- Isolation: Optical isolation, channel-to-backplane
- Scan Rate: Configurable via controller (typical 100 ms)
- Connector Type: 40-pin mass termination (CC = Compact Carrier)
- Backplane Interface: Honeywell Compact Carrier (CC series)
- Operating Temperature: 0°C to +60°C
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5% to 95% non-condensing
- Power Consumption: ≤ 3.5 W (from backplane)
- Weight: Approx. 250 g
- Certifications: CE, UL, FM (Class I Div 2 compatible configurations)
- Firmware: Managed via Experion PKS Control Builder
Proven Application Environments
- Oil & Gas upstream/downstream process control (valve position feedback, pump status)
- Petrochemical plant safety interlock monitoring
- Power generation turbine and boiler discrete status acquisition
- Pharmaceutical batch process event logging
- Pulp & paper mill equipment status monitoring
- Water treatment plant level switch and flow switch integration
Engineering Advantages
- High Channel Density: 32 DI channels per module slot reduces chassis footprint and wiring cost.
- Optical Isolation: Protects controller backplane from field-side transients and ground loops.
- Hot-Swap Capable: Supports online replacement without process shutdown (with redundant controller configuration).
- Integrated Diagnostics: Channel-level fault detection reported to Experion Station via FDM.
- Compact Carrier (CC) Form Factor: Optimized for high-density I/O cabinets; compatible with Honeywell’s standard marshalling architecture.
- Deterministic Scan: Synchronized with C200/C300 controller execution cycle for time-stamped event capture.
System Architecture & Signal Flow
Field 24 VDC signals (from limit switches, proximity sensors, relay contacts) are wired to the 40-pin CC termination assembly. The 2MLI-D24B-CC optically isolates and conditions each channel, then presents digital state data to the Experion PKS controller via the Compact Carrier backplane bus. The controller maps each channel to a process database tag, which is accessible in real time via Experion Station HMI, historian, and alarm management subsystems.
Compatible Controllers: C200, C200E, C300 | Compatible Carriers: All Honeywell CC-series Compact Carriers | Engineering Tool: Experion PKS Control Builder R500+
Sourcing & Quality Verification
- Condition: New (factory-sealed) and Refurbished (tested, certified) options available — specify at inquiry.
- Traceability: Each unit ships with OEM label intact, date code visible, and Konmask inspection certificate.
- Testing Protocol: Power-on functional test, channel continuity verification, and backplane communication handshake prior to shipment.
- Warranty: 12-month Konmask warranty on all verified units.
- Lead Time: In-stock units ship within 3–5 business days; EX-stock sourcing within 10–15 business days.
Procurement Process
- Submit RFQ via support@konmask.com with quantity, required condition (new/refurbished), and delivery timeline.
- Receive formal quotation with unit price, lead time, and shipping terms (EXW Xiamen / CIF destination).
- Confirm PO; Konmask issues proforma invoice.
- Payment via T/T, L/C, or agreed terms; shipment with full documentation (packing list, commercial invoice, COO, inspection certificate).
- Post-delivery technical support available via email or WhatsApp.
Technical FAQ
Q: Is the 2MLI-D24B-CC compatible with the Honeywell C300 controller?
A: Yes. The module is compatible with C200, C200E, and C300 controllers when installed in a Compact Carrier (CC) chassis. Verify firmware revision compatibility via Experion PKS Control Builder before installation.
Q: Can this module accept 120 VAC field signals?
A: No. The 2MLI-D24B-CC is rated for 24 VDC inputs only. For 120 VAC discrete inputs, Honeywell offers the 2MLI-A12B-CC variant.
Q: What is the difference between the -CC and -MC suffix variants?
A: The -CC suffix denotes Compact Carrier form factor (40-pin termination). The -MC suffix denotes Modular Carrier form factor with individual terminal blocks. Both are electrically equivalent but mechanically incompatible.
Q: Does Konmask provide installation and commissioning support?
A: Konmask provides remote technical support, wiring diagrams, and configuration guidance. On-site commissioning services can be arranged for large-scale projects.
Q: What documentation is available?
A: Honeywell OEM datasheet, installation guide, and Konmask inspection certificate are provided with each shipment. Additional Experion PKS engineering references available upon request.
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