Honeywell MC-TAMT04 51305890-175 Low Level Input Multiplexer | Replacement, Equivalent & Selection Guide
The Honeywell MC-TAMT04 (P/N 51305890-175) is a Low Level Input Multiplexer module designed for use in Honeywell TDC 3000 Distributed Control Systems. It provides precision analog signal conditioning for thermocouple and millivolt-level inputs, enabling accurate process measurement in demanding industrial environments. This page serves as a comprehensive selection, replacement, and sourcing reference for automation engineers and procurement teams.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Honeywell Process Solutions |
| Part Number | MC-TAMT04 |
| Reference Number | 51305890-175 |
| Module Type | Low Level Input Multiplexer (LLIM) |
| Series / Platform | TDC 3000 / TotalPlant Solution (TPS) |
| Input Type | Thermocouple / Millivolt (Low Level Analog) |
| Number of Channels | 4 (multiplexed) |
| Signal Range | Low-level mV signals (thermocouple-compatible) |
| Communication | Honeywell proprietary backplane bus |
| Mounting | Card cage / backplane slot |
| Weight | 1,540 g (approx.) |
| Condition Available | New / Refurbished / Tested |
Compatible Replacement & Equivalent Models
When the MC-TAMT04 is unavailable or end-of-life, the following models may serve as functional equivalents or drop-in replacements depending on your system revision. Always verify firmware and backplane compatibility before substitution.
| Model | P/N | Compatibility Notes |
|---|---|---|
| MC-TAMT04 | 51305890-175 | Original — this listing |
| MC-TAMT04 | 51305890-150 / -100 | Earlier revisions; verify firmware level |
| MC-TAMT08 | 51305890-xxx | 8-channel variant; same platform, higher density |
| MC-TAIH02 | 51304485-xxx | High-level analog input; different signal range |
| MC-TAIH04 | 51304485-xxx | 4-ch high-level input; confirm I/O type before swap |
Note: Cross-referencing must be validated against your TDC 3000 system revision and I/O termination assembly. Contact our engineers for a free compatibility check.
Why Choose the Original MC-TAMT04
- Guaranteed OEM Compatibility: Designed specifically for Honeywell TDC 3000 / TPS backplane architecture — no firmware patching required.
- Precision Low-Level Signal Handling: Optimized for thermocouple and mV-range inputs with built-in cold junction compensation support.
- Proven Field Reliability: Widely deployed in refinery, chemical, and power generation DCS environments globally.
- Reduced Integration Risk: Eliminates compatibility unknowns associated with third-party substitutes in safety-critical loops.
- Long Service Life: Robust card design supports extended operation in 24/7 continuous process environments.
Typical Applications
- Thermocouple temperature measurement in refinery and petrochemical DCS
- Low-level mV signal acquisition in boiler and turbine control systems
- Multi-point temperature monitoring in pharmaceutical batch processes
- Process variable input for TDC 3000 / TPS Advanced Process Manager (APM)
- Replacement and spare parts management for legacy Honeywell DCS installations
System Compatibility
- Platform: Honeywell TDC 3000, TotalPlant Solution (TPS)
- Compatible Controllers: Advanced Process Manager (APM), High-Performance Process Manager (HPM)
- I/O Termination: Requires compatible Low Level Termination Assembly (LLTA)
- Backplane: Standard TDC 3000 I/O card cage slot
- Not compatible with: Honeywell Experion PKS C300/C200 series (different I/O architecture)
Selection Guide
Use the following criteria to confirm the MC-TAMT04 is the right module for your application:
- Signal Type: Select MC-TAMT04 for thermocouple or low-level mV inputs. For 4–20 mA or 1–5 V signals, consider MC-TAIH04 instead.
- Channel Count: MC-TAMT04 provides 4 multiplexed channels. For 8-channel density, evaluate MC-TAMT08.
- System Generation: Confirm your TDC 3000 revision supports the -175 firmware level. Earlier revisions may require -150 or -100 suffix.
- Termination Assembly: Verify your existing LLTA wiring matches the MC-TAMT04 pinout before installation.
- Spare vs. Active: For active loop replacement, request a tested & certified unit. For cold spare inventory, new-surplus stock is cost-effective.
Quality Assurance & Sourcing
- All units sourced from authorized distributors, OEM surplus, or certified refurbishers
- Functional testing performed prior to shipment (refurbished units)
- Anti-static packaging with inspection report included
- Traceability documentation available upon request
- Warranty: 12 months on new units; 6 months on refurbished units
How to Order
- Confirm your part number: MC-TAMT04 / 51305890-175
- Specify required condition: New, Refurbished, or Tested Surplus
- Provide system details (TDC 3000 revision, APM/HPM type) for compatibility verification
- Submit your inquiry via support@konmask.com or call +0086 19859288691
- Receive quote within 24 hours with lead time and shipping options
Replacement & Compatibility FAQ
Q: Can MC-TAMT04 51305890-175 replace the -150 revision?
A: In most cases yes, but verify the firmware level supported by your APM/HPM controller. The -175 is a later revision with potential firmware enhancements.
Q: Is MC-TAMT04 compatible with Honeywell Experion PKS?
A: No. Experion PKS uses a different I/O architecture (Series C or CHARMS). MC-TAMT04 is specific to TDC 3000 / TPS platforms.
Q: What is the difference between MC-TAMT04 and MC-TAMT08?
A: The MC-TAMT08 offers 8 multiplexed low-level input channels versus 4 on the MC-TAMT04. Both use the same platform and termination type.
Q: Can I use a high-level input module (MC-TAIH04) as a replacement?
A: No. High-level modules are designed for 4–20 mA / 1–5 V signals and cannot accurately process thermocouple or mV-range inputs.
Q: Do you provide testing certificates?
A: Yes. Functional test reports are available for all refurbished units. New surplus units include original manufacturer documentation where available.
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