Product Description

The TK-IAH161 (Part Number: 51304754-175) is a high-density High-Level Analog Input (HLAI) module designed for Honeywell Experion PKS and Series A control architectures. It supports up to 16 analog input channels, allowing reliable acquisition of standard industrial voltage and current signals from field instruments measuring pressure, flow, temperature, and level.

Built for continuous-duty industrial environments, the TK-IAH161 provides robust signal conditioning and 16-bit analog-to-digital conversion, ensuring accurate and repeatable process variable representation. Its Series A form factor allows seamless installation into C200 controller racks, supporting both centralized and distributed I/O deployments in large-scale Distributed Control Systems (DCS).

Technical Specifications

Application Scenarios

• Monitoring 4–20 mA transmitter loops in petrochemical and refining processes

• Acquiring voltage-based analog signals in power generation facilities

• High-density analog signal consolidation for C200 controller nodes

• Replacement of legacy HLAI modules during system upgrades and life-extension projects

Frequently Asked Questions

Does the TK-IAH161 support differential inputs?
No. The TK-IAH161 is designed for single-ended high-level analog inputs. Applications requiring differential measurement or per-channel isolation typically require a different analog input module family.

How are 4–20 mA signals handled?
Current signals are converted to 1–5 VDC using a precision 250 Ω resistor, either integrated within the terminal assembly or provided through the I/O configuration, depending on the Series A installation setup.