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).
| Parameter | Specification |
|---|---|
| Model Designation | TK-IAH161 |
| Part Number | 51304754-175 |
| Functional Category | High-Level Analog Input (HLAI) |
| Channel Count | 16 Single-Ended Inputs |
| Supported Input Ranges | 1–5 VDC or 4–20 mA |
| Current Conversion | 250 Ω precision resistor (terminal or internal, configuration dependent) |
| A/D Resolution | 16-bit |
| System Compatibility | Honeywell Series A / Experion PKS |
| Isolation | High-voltage tested field-to-logic isolation |
| Power Source | Supplied via Series A chassis backplane |
| Operating Environment | Industrial EMI-resistant design |
| Physical Dimensions | 12.7 × 12.7 × 12.7 cm |
| Unit Weight | 0.8 kg |
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
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.
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