Honeywell TC-IAH161 High Level Analog Input Module

Overview

The Honeywell TC-IAH161, also identified as the TC-IAH161 High Level Analog Input Module, acquires voltage and current signals from field instruments for processing by the Honeywell Series C I/O platform. It supports 16 single-ended input channels with 16-bit analog-to-digital conversion. Configurable input ranges include 0-5 V, 0-10 V, +/-5 V, +/-10 V, and 0-20 mA. The module publishes input data at a specified rate of 250 ms.

Hardware Specifications

Analog Input Signal Processing

The TC-IAH161 converts field voltage and current signals into digital process values for the control system. Its 16-bit conversion resolution supports measurement across the configured input ranges. The 20 Hz channel bandwidth defines the stated -3 dB response point.

For current inputs, the specified nominal input resistance is 249 ohms. The supplied data also describes an internal 250-ohm resistor for current measurement. Confirm the applicable wiring configuration and supported signal ranges before connecting field devices.

The module specification lists a user-to-system isolation test of 2550 VDC for 1 second. This test value should not be interpreted as a continuous operating voltage rating.

Frequently Asked Questions (FAQ)

Q: Which analog input signals does the TC-IAH161 support?

A: The supplied specifications list voltage ranges of 0-5 V, 0-10 V, +/-5 V, and +/-10 V, plus a current range of 0-20 mA. Verify the supported range configuration against the applicable hardware manual.

Q: What is the analog input resolution?

A: The module uses a 16-bit analog-to-digital converter. The effective measurement accuracy also depends on the selected range and the applicable module specifications.

Q: Which terminal block is specified for the TC-IAH161?

A: The supplied data identifies the TC-TBCH 36-position terminal block. Confirm terminal assignments and field wiring requirements in the manufacturer’s documentation before installation.

Field Installation Guidelines

• Verify the module model and compatibility with the installed Honeywell Series C I/O hardware before installation.
• Confirm the input signal type and range for each connected field instrument.
• Check the terminal assignments for the TC-TBCH 36-position terminal block before wiring.
• Route analog signal cables separately from motor power cables, switching circuits, and other sources of electrical interference.
• Apply shield grounding according to the system installation manual and site grounding practices.
• Verify field polarity, common connections, and current-loop wiring before energizing the circuit.
• Confirm the module’s power requirements and chassis compatibility using the applicable manufacturer’s documentation.
• Check the control system’s reported channel values after installation to verify correct signal acquisition.

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