Honeywell MC-TAIH22 80366195-150 Analog Input FTA

This field termination assembly (FTA) provides signal conditioning for analog field devices. It interfaces thermocouples, RTDs, and transmitters with Honeywell analog input modules. Engineers use this unit to simplify field wiring and enhance measurement accuracy. The design incorporates comprehensive filtering and protection for reliable signal acquisition. Its compact layout suits standard Honeywell Experion PKS and TDC 3000 racks.

Input Channel Architecture

The MC-TAIH22 80366195-150 provides 16 differential analog input channels with individual termination points. Each channel handles thermocouple, RTD, or 4-20mA transmitter signals through dedicated terminal pairs. The FTA groups channels into two banks of eight for organized field cabling. Every channel includes a built-in resistor network for proper signal scaling. Furthermore, the assembly provides cold-junction compensation circuitry for thermocouple measurements.

Signal Conditioning Features

Each channel incorporates programmable gain amplifiers for optimizing signal range matching. The FTA provides software-selectable input ranges from 0-10V to ±100mV. Built-in low-pass filters attenuate high-frequency noise on each input channel. The assembly includes precision current sensing resistors for 4-20mA loop measurements. Consequently, users achieve clean, stable signals for accurate process variable readings.

Physical Dimensions and Rack Mounting

The MC-TAIH22 80366195-150 measures 12.7 cm in width, 25.4 cm in height, and 20.3 cm in depth. It weighs approximately 1.0 kg, which ensures stable placement within the rack assembly. A steel housing provides mechanical protection and electromagnetic shielding. The unit mounts directly into Honeywell Experion PKS or standard 19-inch racks. Its front panel locates all input terminals for convenient field wiring access.

Connector Interfaces and Field Wiring

A 36-pin barrier-style terminal block handles all input terminations on the front face. This terminal block accepts wire gauges from 0.2 mm² to 2.5 mm² for secure connections. Shield terminals provide grounding points for cable braids on each input channel. The FTA includes clear labeling for channel identification and wiring guidance. Strain relief clamps protect field wiring from vibration-induced movement and disconnection.

Internal Components and Power Consumption

The printed circuit board contains 16 precision resistors, 32 capacitors, and 8 operational amplifiers. The FTA draws 100 mA from the 5 VDC backplane under normal operational load. It also requires 50 mA from the external 24 VDC supply for field device excitation. No active memory components exist on this purely passive termination assembly. The simple design ensures high reliability and zero configuration loss during power cycles.

Protection and Diagnostic Features

The MC-TAIH22 80366195-150 includes transient suppression on each input for surge immunity. Input protection diodes clamp voltages above ±30 VDC to prevent FTA damage. The assembly provides overcurrent protection for each current input channel. Ground loop isolation reduces measurement errors from potential differences. These protective features ensure accurate measurements in electrically noisy industrial environments.

Status Indication and Monitoring

Two front-panel LEDs indicate FTA power and overall health status. A green LED confirms proper power supply while a red LED signals input overrange conditions. The FTA provides a diagnostic output for external monitoring and alarming. This output activates when any channel exceeds its configured range limits. Maintenance personnel can quickly identify faulty sensors or wiring issues.

Environmental Specifications and Compliance

The MC-TAIH22 80366195-150 operates reliably across temperatures from 0°C to 55°C. It withstands humidity levels up to 95% non-condensing without performance degradation. The FTA complies with IEC 61000-4-2 for electrostatic discharge immunity. Vibration tolerance meets IEC 60068-2-6 requirements for industrial environments. This robust construction suits chemical processing, power generation, and refinery automation applications.

Technical Data Sheet – Honeywell MC-TAIH22 80366195-150