Honeywell CC-TUIO31 Universal Input/Output IOTA Module

Overview

Configured for universal current signal acquisition and I/O processing in Honeywell control systems, the Honeywell CC-TUIO31 (CC-TUIO31 Universal Input/Output IOTA Module) accepts 2, 3, or 4 wire current devices and processes 0-20 mA or 4-20 mA signals through a 16 bit A/D converter. It also supports HART 7 communication for analog I/O channels.

Hardware Specifications

Honeywell Process I/O and HART Interface

The CC-TUIO31 processes current signals from 2, 3, or 4 wire field devices. It supports both 0-20 mA and 4-20 mA input ranges and applies 16 bit analog-to-digital conversion.

Furthermore, the module provides HART 7 support for analog I/O. Each channel includes a HART modem, which supports digital communication with compatible HART field devices while the analog signal remains available for I/O processing.

The module scans inputs at a 10 ms rate. Therefore, applications requiring priority I/O processing can use its Fast Scan function. The module also provides electronic short circuit protection.

The specified normal mode rejection reaches 18 dB at 50 Hz and 20 dB at 60 Hz. In addition, channel-to-channel crosstalk remains specified at 60 dB from dc to 60 Hz.

The module supports configurable FAILOPT behavior for Digital / Analog Output functions on a per-channel basis. The supplied specifications also define an extended module ambient temperature range of -40 to +70 deg C.

Frequently Asked Questions

Q: What current input ranges does the CC-TUIO31 support?
A: The module supports 0-20 mA and 4-20 mA current input ranges for 2, 3, or 4 wire devices.

Q: What A/D conversion resolution and scan rate does the module provide?
A: The CC-TUIO31 uses a 16 bit A/D converter and specifies a 10 ms input scan rate.

Q: Does the CC-TUIO31 support HART communication?
A: Yes. The module supports HART 7 for analog I/O and provides one HART modem per channel.

Field Installation Guidelines

• Install the module according to the applicable Honeywell IOTA and control system installation documentation.
• Verify the field device wiring configuration before connecting 2, 3, or 4 wire current devices.
• Confirm that the selected input range matches the connected field transmitter or current source.
• Route analog signal wiring separately from high-voltage and high-current conductors to reduce electrical interference.
• Use appropriate shielded instrumentation cable where the installation requires noise reduction.
• Terminate cable shields according to the plant grounding standard and Honeywell system wiring requirements.
• Verify polarity and loop wiring before energizing the I/O circuit.
• Keep field wiring mechanically secured and prevent excessive force on I/O terminals or connectors.
• Confirm the configured FAILOPT behavior for each applicable Digital / Analog Output channel before placing the control loop into service.
• Maintain the specified module ambient temperature range of -40 to +70 deg C.
• Check HART communication wiring and device compatibility before commissioning HART functions.
• Perform signal verification after installation by checking the expected current range and corresponding controller input value.

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