The Honeywell TC-IAH161 is a 16-channel high-level analog input module for Honeywell distributed control systems (DCS). It converts field analog signals — voltage and current — into digital data for real-time process monitoring and control. The module supports HART communication on each channel, enabling integration with smart field devices such as pressure, temperature, and flow transmitters. It is designed primarily for the Experion PKS platform (C200, C300 controllers) and is also compatible with Experion LS, Experion HS, and PlantScape systems.

Model Characteristics

High Channel Density: 16 analog input channels in a single module, reducing rack space and wiring cost for large-scale process applications.

Dual Signal Type Support: Each channel accepts voltage inputs (±10.25 V, 0–10.25 V, 0–5.125 V) or current inputs (0–20.5 mA with internal 250 Ω sense resistor), selectable via software configuration.

16-Bit Resolution: Provides 16-bit A/D conversion across all input ranges, with a calibrated accuracy better than 0.05 % of range for voltage and 0.15 % of range for current (including the sense resistor).

HART Protocol Support: Each channel supports HART digital communication, allowing remote device configuration, diagnostics, and asset management without additional hardware.

Robust Isolation and RFI Immunity: User-to-system isolation is 100 % tested at 2,550 V DC for 1 second. RFI immunity maintains error below 2.0 % of range at 10 V/m from 27 to 1,000 MHz, ensuring stable readings in electrically noisy environments.

Open-Circuit Detection: Built-in diagnostics detect open circuits in less than 5 seconds. On voltage inputs, even channels drive to positive full scale and odd channels to negative full scale; on current inputs, the reading goes to negative full scale.

Low Power and Thermal Footprint: Maximum power dissipation is 4.1 W, with a module publish rate of 250 ms for timely data updates.

Pluggable Terminal Block: Uses the TC-TBCH 36-position terminal block for straightforward field wiring and maintenance.

Parameters Specifications

The difference between TC-IAH161 and TC-IDK161

Frequently Asked Questions

What DCS platforms is the TC-IAH161 compatible with?
The module is designed for Honeywell DCS families including Experion PKS (C200, C300), Experion LS, Experion HS, PlantScape, TDC 2000, TDC3000, and TPS.

Does the TC-IAH161 support HART communication?
Yes. Each of the 16 channels supports HART protocol, enabling digital data exchange with smart transmitters for remote diagnostics and configuration.

How is open-circuit detection handled?
The module detects open circuits in less than 5 seconds. For voltage inputs, even channels read positive full scale and odd channels read negative full scale. For current inputs, the reading goes to negative full scale.

Is channel-to-channel isolation provided?
The module provides user-to-system isolation tested at 2,550 V DC. Individual channel-to-channel isolation specifications should be verified against the specific system configuration and installation manual.

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