Product Description

Model Definition

• 51304736-125: Official Honeywell part number.

  • 5130 = TDC 3000 DCS series

  • 4736 = Low‑Level Analog Input FTA family

  • 125 = Specific hardware revision, channel configuration, and non‑conformal coated variant

• Common Alias: MU‑TAIL03 (Low‑Level Analog Input FTA, Isolated)

• Alternative Designations: 51304736125 (no hyphen), LLAI FTA GI, TC/RTD FTA.

Technical Specifications

• Channels: 16 differential low‑level analog input channels.

• Signal Types:

  • Thermocouple (TC): J, K, T, E, R, S, B, N types (mV range)

  • RTD: PT100, PT1000 (2‑wire, 3‑wire, 4‑wire configurable)

  • Millivolt (mV) transmitters

• Galvanic Isolation: 1500 VAC RMS between field side and system side; suppresses EMI/RFI and eliminates ground loops.

• Termination: Crimp‑style screw terminals with gold‑plated contacts for vibration resistance and long‑term stability.

• Loop/Reference Power: 24 VDC nominal for RTD excitation; open‑circuit voltage 28 VDC; short‑circuit current ≤ 93 mA.

• Operating Temperature: -20°C to +60°C.

• Storage Temperature: -40°C to +70°C.

• Humidity: 5%–95% non‑condensing.

• Conformal Coating: No (standard PCB, for clean environments).

• Certifications: CE, UL, CSA, RoHS compliant.

• Form Factor: Size B, 307 mm length.

• Weight: Approx. 2.2 kg.

Interface and Communication Configuration

• System Interface: Connects via dedicated ribbon cable to Honeywell low‑level analog input modules (e.g., MC‑PLAM02 / 51304362‑150).

• Field Interface: 16 differential terminal pairs, supporting TC, RTD, and mV transmitters; polarity‑sensitive with built‑in cold‑junction compensation (CJC) routing.

• Isolation Barrier: Complete electrical separation between field wiring and DCS backplane; blocks high‑voltage transients and ground potential differences.

• Onboard Communication: Passive FTA—no independent protocol; all data processing, linearization, and diagnostics handled by the connected LLAI module and DCS network.

Core Functions

1. Low‑Level Signal Termination: Accepts 16 channels of TC, RTD, or mV signals from process sensors.

2. Galvanic Isolation: 1500 VAC isolation protects DCS hardware and improves measurement integrity.

3. Signal Conditioning & CJC: Precision circuitry amplifies/filters low‑level signals; routes cold‑junction compensation for thermocouple accuracy.

4. RTD Excitation: Provides stable 24 VDC excitation for 2/3/4‑wire RTDs.

5. Vibration‑Resistant Termination: Gold‑plated crimp terminals minimize corrosion and signal loss in industrial environments.

6. Drop‑In Compatibility: Matches TDC 3000/TPS/UCN low‑level analog input modules for seamless integration.

Application Scenarios

• Target Systems: Honeywell TDC 3000, TPS, UCN DCS.

• Industries: Oil & gas, chemical, petrochemical, power generation, pharmaceutical, pulp & paper, and other continuous process industries.

• Field Devices: Thermocouples, PT100/PT1000 RTDs, millivolt‑level pressure/temperature transmitters.

• Installation: Control room cabinets, local panels in clean, non‑corrosive process plants (no conformal coating).

Usage and Maintenance Instructions

Usage

1. Mounting: Install in standard DCS cabinet with adequate ventilation and wiring clearance.

2. System Connection: Attach ribbon cable to MC‑PLAM02 or compatible LLAI module; ensure connectors are fully seated and latched.

3. Field Wiring: Terminate TC/RTD/mV cables per polarity and wiring standards; use recommended torque to avoid loose connections. For RTDs, configure 2/3/4‑wire jumpers as required.

4. Power‑On & Verification: Energize DCS; check for no fault alarms; verify accurate sensor readings via DCS operator interface.

Maintenance

• Environment: Keep area clean, dry, and ventilated; avoid dust, moisture, and corrosive gases (critical for non‑coated PCB).

• Periodic Inspection (Quarterly): Check terminal tightness, cable integrity, and isolation status; retighten terminals if loose; replace damaged cables.

• Cleaning: Wipe enclosure with dry, lint‑free cloth; do not use liquid or abrasive cleaners on PCB/terminals.

• Spare Storage: Store spare FTAs in anti‑static bags in cool, dry location; minimize ESD exposure during handling.