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Honeywell TC-IAH161 High Level Analog Module

Configured for high level analog signal acquisition in Honeywell control system I/O platforms, the Honeywell TC-IAH161 (TC-IAH161 High Level Analog Module) provides direct physical/electrical execution for voltage and current input measurement across 16 analog channels.

Hardware Specifications

Parameter	Specification
Model	TC-IAH161
Brand	Honeywell
Product Type	High Level Analog Module
Number of Channels	16 input channels
Input Voltage Range	+/- 10.25 V, 0 to 10.25 V, 0 to 5.125 V
Input Current Range	0 to 20.5 mA with internal 250 ohm resistor
Voltage Resolution	16 bits across configured input ranges
Module Publish Rate	250 msec
Input Impedance (Voltage)	Greater than 1.0 Mohm
Input Impedance (Current)	249 ohm nominal
Channel Bandwidth	20 Hz (-3 dB)
RFI Immunity	Error less than 2.0% of range at 10 V/m, 27 to 1000 MHz
Power Consumption	4.1 W maximum
Isolation Voltage	User to system: tested at 2550 VDC for 1 s
Connection Terminal Block	TC-TBCH, 36-position terminal block
Origin	USA
Operating Temp	Not specified

Process Control Analog Signal Interface

The TC-IAH161 is designed for analog measurement within Honeywell process control I/O architectures. The module accepts high level voltage and current signals through 16 independent input channels. The 0 to 20.5 mA current input range uses an internal 250 ohm conversion resistor for analog signal conditioning.

The module provides channel measurement resolution through a 16-bit analog-to-digital conversion process. Voltage input impedance above 1.0 Mohm minimizes loading effects on connected field devices, while the nominal 249 ohm current input impedance maintains standard industrial analog loop characteristics.

For process instrumentation applications, channel-to-channel isolation and signal conditioning functions support separation between field wiring and system electronics. Analog loop integration can be combined with standard 4-20 mA HART field device interfaces when external HART communication components are provided within the control architecture.

Frequently Asked Questions

Q: Does the TC-IAH161 support direct 4-20 mA signal measurement?
A: The module supports a 0 to 20.5 mA input range through an internal 250 ohm resistor, allowing measurement of standard current loop signals including 4-20 mA ranges.

Q: What type of terminal connection is required for the TC-IAH161?
A: The module connects through a Honeywell TC-TBCH 36-position terminal block for field signal termination.

Q: What is the module publish rate for analog input data?
A: The TC-IAH161 publishes input data at a rate of 250 msec.

Field Installation Guidelines

Install the TC-IAH161 in the designated Honeywell I/O rack or termination assembly according to the applicable system hardware configuration.

Use shielded instrumentation cable for analog signal wiring where required by the installation environment. Connect cable shields according to the site grounding standard to reduce electromagnetic interference and maintain signal integrity.

Separate analog signal wiring from high-voltage power cables and switching circuits to minimize induced noise. Verify field device signal polarity, voltage range selection, and current loop wiring before applying system power.

Ensure the TC-TBCH terminal block connections are fully seated and that all field wiring terminals are mechanically secured before commissioning.

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