TC-FIAH81 | Honeywell | 8-Channel High-Level Analog Input Module

Product Description

The TC-FIAH81 is a high-speed analog acquisition module engineered for the Honeywell Experion PKS and C200 controller architectures. Designed for high-level signal processing, this module provides eight single-ended inputs capable of interfacing with a variety of industrial sensors. It features a highly efficient 256 µs conversion rate across all channels, making it suitable for dynamic control loops where rapid data refreshing is essential. The unit is optimized for 16-bit data formatting (left-justified 2's complement), ensuring seamless integration with the system's internal processing logic while maintaining a low thermal footprint.

Technical Specifications

• Module Identification: TC-FIAH81

• Input Density: 8 Single-Ended Channels

• Configurable Signal Ranges: Voltage (±10V, 0-10V) or Current (0-20mA, 4-20mA)

• Conversion Resolution: 12-bit unipolar; 11-bit plus sign bipolar

• Current Sensitivity: 5.13 µA per count

• Input Impedance (Voltage): 100 kΩ

• Input Impedance (Current): 238 Ω

• Global Update Rate: 256 µs for all active channels

• System Isolation: 850 VDC (User-to-System); No channel-to-channel isolation

• Calibration Accuracy: ±0.20% Full Scale @ 25°C

• Continuous Overload Protection: 30V or 32mA (single channel limit)

• Power Consumption: Maximum 3 W @ 31.2V DC

• Thermal Output: 10.2 BTU/hr

• Operating Footprint: 51 mm x 178 mm x 356 mm

• Storage Environment: -40°C to +85°C

Operational Application

The TC-FIAH81 is a versatile choice for monitoring standard process variables such as pressure, temperature, and flow rate where high-level signals are pre-conditioned by field transmitters. Its single-ended design is most effective in environments with a common signal ground, allowing for high-density I/O integration within a compact 51 mm wide chassis. For mission-critical loops, the module’s integrated overload protection prevents field-side surges from damaging the internal circuitry.

Frequently Asked Questions

• Does this module support differential input wiring?

  The TC-FIAH81 is specifically designed for single-ended inputs. For applications requiring differential wiring to reduce common-mode noise, an alternative module like the TC-FXX series should be considered.

• Is there individual channel isolation?

  While the module provides 850 VDC isolation between the field wiring and the controller backplane, the channels share a common ground. Applications requiring channel-to-channel isolation should utilize the TC-HAI081 series.