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Honeywell TC-IAHI61 High-Level Analog Input Module

Configured for high-level analog signal acquisition in Honeywell Experion PKS and TDC 3000 DCS platforms, the Honeywell TC-IAHI61 (TC-IAH161 High-Level Analog Input Module) provides direct physical and electrical conversion of field voltage and current signals into digital process data.

Hardware Specifications

Parameter	Specification
Model	TC-IAHI61
Brand	Honeywell
Origin	USA
Module Type	High-Level Analog Input (HLAI) Module
Compatible Systems	Honeywell Experion PKS, TDC 3000 DCS
Weight	Approx. 1.5 kg
Power Consumption	4.1 W maximum
Number of Channels	16 independent analog input channels
Input Signal (Voltage)	+/-10.25 V, 0 to 10.25 V, 0 to 5.125 V
Input Signal (Current)	4-20 mA, 0 to 20.5 mA via internal 250 ohm resistor
A/D Conversion Resolution	16-bit
Module Update Rate	250 ms
Sampling Capability	Up to 1 kHz transient capture rate
Voltage Input Impedance	Greater than 1.0 Mohm
Current Input Impedance	249 ohm nominal
Channel Bandwidth	20 Hz (-3 dB)
RFI Immunity	Less than 2% error of range at 10 V/m, 27 to 1000 MHz
Isolation Voltage	2550 VDC for 1 second (User to System)
Compatible Terminal Block	TC-TBCH 36-position terminal block

Process Signal Isolation and DCS Interface

The Honeywell TC-IAHI61 integrates high-level analog measurement circuits for direct connection to field transmitters. The module supports mixed voltage and current input configurations across 16 channels, allowing individual channels to process different transmitter output types.

For Honeywell DCS installations, the module provides channel-to-channel isolation to reduce electrical interaction between field circuits. The input architecture supports 4-20 mA HART loop protocol compatibility at the signal level when external HART communication requirements are applied through the associated field wiring design.

The module performs analog-to-digital conversion with 16-bit resolution and transfers processed measurement values to the controller environment through the Experion PKS I/O subsystem. Open circuit detection functions monitor field loop continuity and identify transmitter wiring faults.

Frequently Asked Questions

Q: Does the TC-IAHI61 support mixed analog input types on the same module?
A: Yes. The module supports independent channel configuration for voltage and current input signals, including 4-20 mA and multiple voltage ranges.

Q: What isolation function is provided by the TC-IAHI61?
A: The module provides user-to-system electrical isolation tested at 2550 VDC for 1 second and includes channel-level signal protection functions.

Q: Which terminal block is compatible with the TC-IAHI61 module?
A: The module interfaces with the Honeywell TC-TBCH 36-position terminal block for field wiring termination.

Field Installation Guidelines

• Install the module in the designated Honeywell Experion PKS or TDC 3000 I/O chassis location according to system configuration requirements.
• Verify terminal block installation and confirm field wiring polarity before applying power.
• Use shielded instrumentation cables for analog signal connections where electromagnetic interference is present.
• Connect cable shields according to the site grounding standard to minimize induced noise on low-level analog circuits.
• Separate analog signal wiring from high-voltage power cables and switching circuits.
• Confirm transmitter output range settings match the configured voltage or current input parameters before commissioning.

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