Honeywell 2MLF-DC4S – 4-Channel Analog Output Module | TDC 3000 / TotalPlant Series
Engineering Background
The Honeywell 2MLF-DC4S is a precision analog output card engineered for the Honeywell TDC 3000 and TotalPlant distributed control system (DCS) platform. Designed to meet the rigorous demands of continuous process industries, this module delivers stable, isolated 4–20 mA current loop signals to field actuators, control valves, and variable-speed drives. Its architecture reflects Honeywell’s legacy of reliability in refining, petrochemical, and power generation environments where signal integrity and uptime are non-negotiable.
Product Positioning
The 2MLF-DC4S serves as a direct-replacement analog output card for legacy TDC 3000 installations and is fully compatible with TotalPlant Solution (TPS) migration projects. Procurement engineers sourcing this module for MRO (maintenance, repair, and operations) or system expansion will find it a cost-effective alternative to new-build hardware, backed by Konmask’s quality verification process.
Complete Technical Specifications
- Part Number / SKU: 2MLF-DC4S
- Manufacturer: Honeywell Process Solutions
- Platform / Series: TDC 3000 / TotalPlant Solution (TPS)
- Module Type: Analog Output (AO)
- Number of Channels: 4 channels
- Output Signal Type: 4–20 mA current loop (isolated)
- Output Resolution: 12-bit D/A conversion
- Isolation: Channel-to-channel and channel-to-backplane isolation
- Power Supply: Supplied via DCS backplane (no external PSU required)
- Operating Temperature: 0°C to +60°C (32°F to 140°F)
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5% to 95% non-condensing
- Mounting: Card-slot insertion into TDC 3000 / TPS I/O carrier
- Compliance: CE, UL listed (per original Honeywell certification)
- Weight: Approx. 150 g
- Dimensions: Standard Honeywell I/O card form factor
Proven Application Environments
- Petroleum refining and upstream oil & gas production facilities
- Petrochemical and specialty chemical batch/continuous processes
- Power generation plants (coal, gas, nuclear auxiliary systems)
- Pulp & paper and water treatment automation systems
- Pharmaceutical manufacturing with validated DCS environments
- TDC 3000 → TPS migration projects requiring backward-compatible I/O
Engineering Advantages
- Drop-in Replacement: Direct slot-compatible substitute for existing TDC 3000 AO cards — no firmware changes or re-wiring required.
- Isolated Outputs: Per-channel isolation prevents ground loops and protects against field-side transients.
- High Resolution: 12-bit DAC ensures fine-grained control of modulating valves and variable-frequency drives.
- Proven Longevity: Honeywell’s industrial-grade components rated for extended service life in harsh environments.
- Minimal Downtime: Hot-swap compatible with TDC 3000 carrier — reduces planned maintenance windows.
System Architecture & Signal Flow
The 2MLF-DC4S receives digital setpoint data from the TDC 3000 / TPS controller via the backplane data bus. Each of the four channels independently converts the digital value through a 12-bit DAC to a proportional 4–20 mA current signal. The isolated current loop drives field devices (e.g., I/P transducers, smart positioners, VFDs) over standard twisted-pair wiring. Diagnostics and channel status are reported back to the DCS operator station via the backplane communication protocol, enabling real-time fault detection without physical inspection.
Sourcing & Quality Verification
All Honeywell 2MLF-DC4S modules supplied by Konmask.com undergo a structured inspection process:
- Visual Inspection: PCB, connectors, and label integrity checked against OEM reference standards.
- Functional Bench Test: Output channel verification at 4 mA, 12 mA, and 20 mA setpoints prior to shipment.
- Traceability: Serial number and firmware revision documented per order.
- Packaging: ESD-safe anti-static bag + foam-lined carton for international transit.
- Warranty: 12-month replacement warranty against manufacturing defects.
Procurement Process
- Submit your RFQ via the product page or email support@konmask.com with quantity and required delivery date.
- Receive a formal quotation with lead time, unit price (HKD/USD), and shipping options within 24 business hours.
- Confirm purchase order — we accept T/T bank transfer, PayPal, and major credit cards.
- Module ships within 1–3 business days from Hong Kong warehouse; DHL/FedEx express available.
- Receive tracking number and inspection report by email upon dispatch.
Technical FAQ
Q: Is the 2MLF-DC4S compatible with TPS (TotalPlant Solution) systems?
A: Yes. The 2MLF-DC4S is backward-compatible with TPS I/O carriers and can be used in TDC 3000 → TPS migration projects without hardware modification.
Q: Can I use this module with a third-party DCS or PLC?
A: No. The 2MLF-DC4S is designed exclusively for Honeywell TDC 3000 / TPS backplane architecture and is not compatible with third-party control systems.
Q: What is the output load impedance range?
A: The 4–20 mA current loop output is designed to drive loads up to 750 Ω (typical). Consult the Honeywell TDC 3000 I/O specification document for exact loop compliance voltage.
Q: Do you provide a certificate of conformance (CoC)?
A: Yes. A CoC and inspection report are available upon request for all orders. Contact support@konmask.com.
Q: What is the minimum order quantity (MOQ)?
A: MOQ is 1 unit. Volume pricing is available for orders of 5+ units.
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