Product Overview

The Honeywell TK-IOLI01 (Part Number 51403427-275) is a versatile I/O Link Interface Module engineered for high-precision building automation and climate control systems. This module serves as a critical communication bridge, facilitating the management of multi-stage heating and cooling equipment. It is designed to handle complex HVAC configurations, including heat pump systems with up to 4 heating and 2 cooling stages, as well as conventional setups utilizing gas, oil, or steam.

Beyond standard temperature regulation, the TK-IOLI01 integrates comprehensive Indoor Air Quality (IAQ) management. Through universal IAQ contacts and dedicated sensor inputs, the module orchestrates humidification, dehumidification, and ventilation systems. Its robust electrical design, featuring high-voltage isolation and surge protection, ensures that sensitive control logic remains shielded from the electrical transients common in commercial and residential utility environments.

Key Technical Characteristics

• Multi-Stage Control Flexibility: Supports sophisticated HVAC logic for up to 4H/2C heat pump stages or 3H/2C conventional stages, ensuring optimal energy efficiency and comfort.

• Integrated IAQ Management: Features universal IAQ contacts for the unified control of ventilation and moisture levels, streamlining the hardware required for healthy indoor environments.

• Robust Electrical Protection: Engineered with a surge protection rating of $\pm 4$ kV and 1500V AC isolation to maintain system uptime in electrically noisy or unstable environments.

• Expandable Sensor Interfacing: Includes four dedicated inputs for wired sensors or dry contact peripherals, allowing for customized monitoring of external conditions or equipment status.

• Universal HVAC Compatibility: Operates seamlessly with a wide range of heating sources, including electric, oil, gas, and steam-based systems.

• Reliable 24V DC Operation: Designed to operate on a standard 24V DC $\pm 10\%$ power supply, facilitating easy integration into existing control panels.

• Space-Efficient Vertical Mounting: The slim-line vertical profile ($9\ 5/16" \times 4\ 13/16" \times 1\ 5/8"$) allows for high-density installation in compact automation enclosures.

Technical Specifications

• Manufacturer: Honeywell

• Model Number: TK-IOLI01

• Order Number: 51403427-275

• Module Type: I/O Link Interface

• Revision: REV C

• Input Voltage: 24V DC $\pm 10\%$

• Isolation Rating: 1500V AC

• Surge Protection: $\pm 4$ kV

• HVAC Stages (Heat Pump): 4 Heat / 2 Cool

• HVAC Stages (Conventional): 3 Heat / 2 Cool

• Sensor Inputs: 4 (Wired or Dry Contact)

• Weight: 0.4 kg

• Mounting Orientation: Vertical

• Country of Origin: USA

Industrial Application Areas

• Commercial Building Automation: Centralizing the control of rooftop units (RTUs) and complex multi-stage air handlers in office complexes.

• Light Industrial HVAC: Managing precise temperature and humidity levels in climate-sensitive storage or small-scale manufacturing areas.

• Residential Energy Management: Serving as the interface for high-end, multi-stage domestic heating and cooling systems.

• Institutional Facilities: Coordinating ventilation and air quality standards in schools and healthcare environments.