The Emerson 8105-TI-TC, also cataloged as the 8105-TI Temperature Input Module, operates as a dedicated hardware component for multi-channel thermocouple signal acquisition and digitizing within DeltaV I/O subsystems.

Model Designation & Hardware Subtypes

• Base Model (8105-TI): Core temperature input processing assembly engineered for direct thermocouple signal conditioning.
• Option Variant (-TC): Dedicated thermocouple hardware interface card equipped with dedicated onboard sensor linearization tables.

Physical & Electrical Performance Data

Thermocouple Linearization & Compensation Architecture

Internal signal conditioning converts millivolt thermocouple inputs into engineering units across 4-20 mA HART loop protocol environments and DeltaV field networks. Integrated cold junction compensation (CJC) sensors correct for ambient temperature variations at terminal blocks, while channel-to-channel isolation eliminates ground loop currents and transient noise distortion.

Standard Package Contents

• 1 x Emerson 8105-TI-TC temperature input module
• 1 x Terminal block connector assembly
• 1 x Module installation guidance sheet

Field Wiring & Mechanical Mounting Rules

DIN-Rail Mounting Procedure

• Mount the module base carrier firmly onto standard 35 mm DIN rails inside field enclosures.
• Align rear connector pins with the carrier backplane socket and press until side retention latches click into place.

Wiring & Shield Termination

• Connect thermocouple lead wires to screw terminals using shielded twisted-pair cabling to prevent EMI interference.
• Terminate drain wire shields to the carrier earth bar at a single grounding point.

Frequently Asked Questions

• What specific technical task does the 8105-TI-TC module perform?

  It digitizes millivolt signals from field thermocouples into processed temperature values for DeltaV controllers.

• What does the -TC suffix indicate on the part number?

  The -TC suffix identifies factory configuration for direct thermocouple sensor types and CJC compensation.

• How are ambient temperature drifts mitigated at the terminal terminals?

  Onboard cold junction compensation (CJC) circuits measure terminal block temperature to correct offset values.

• What input sensor types are supported by the 8105-TI-TC?

  The module processes standard thermocouple curve types including B, E, J, K, N, R, S, and T.

• Is external loop power required for thermocouple channels?

  No, thermocouples generate millivolt signals directly and require no external sensor loop excitation.

• How does channel isolation protect signal accuracy?

  Galvanic channel-to-channel isolation stops stray earth ground loop currents from skewing voltage measurements.

• Can the 8105-TI-TC module be replaced while system power is active?

  Yes, the module supports hot-swapping on active carrier backplanes without interrupting adjacent I/O cards.

• How is the module grounded inside the field enclosure?

  Grounding is established through the carrier baseplate connection directly to the DIN rail earth reference.