Honeywell MLE-TN32A Digital Open Collector Output Module, 32-Channel

Product Introduction

When an industrial control system requires reliable switching of multiple DC loads, the Honeywell MLE-TN32A provides a robust solution. This digital open collector output module, part of the ML 50 series, handles 32 channels with a common method of 32 points per common. It accepts a rated input voltage of DC12/24V and delivers a maximum load current of 0.2A per point, with a total of 2A per common. The module's fast response time—1ms or less for both On and Off transitions—ensures precise control in demanding automation environments.

Technical Specifications Breakdown

The MLE-TN32A operates with a load voltage range of DC10.2V to 26.4V, accommodating typical 12V and 24V DC systems. Its off leakage current is 0.1 mA or less, minimizing power waste when outputs are inactive. The maximum voltage drop when On is DC 0.4A, indicating efficient switching with minimal loss. Isolation resistance is 10MΩ or more, measured by megger, providing reliable electrical isolation between channels and the control system. Internal current consumption is 120mA, and the external power supply requires DC12/24V ±10% with a ripple voltage of 4 Vp-p, drawing 20mA or less at 24V DC. The module weighs 104g, making it compact for panel mounting.

Industry Applications

In manufacturing lines, the MLE-TN32A excels at controlling solenoid valves, indicator lights, and small DC motors. For example, a packaging system using 32 individual actuators can rely on this module to switch each load independently, with the 2A per common capacity handling multiple devices simultaneously. The fast 1ms response time supports high-speed sorting operations where timing is critical. In process control, the module's low leakage current ensures that sensitive sensors are not falsely triggered when outputs are off.

Installation & Setup Guidance

When installing the Honeywell MLE-TN32A, ensure the external power supply meets the specified DC12/24V ±10% with ripple under 4 Vp-p. Connect the common terminal to the power supply return, and wire each output to its respective load, respecting the 0.2A per point limit. Use appropriate fusing for each common line to protect against overcurrent. The module's compact 104g weight allows for DIN rail or panel mounting; verify adequate ventilation for heat dissipation. Always follow the manufacturer's wiring diagram to avoid reverse polarity damage.

Maintenance & Reliability

Regular inspection of the MLE-TN32A focuses on checking for loose connections and verifying that the external power supply remains within the specified voltage range. The module's solid-state design reduces wear compared to electromechanical relays, but periodic testing of output channels under load ensures continued reliability. Keep the environment free of excessive dust and moisture to maintain the 10MΩ isolation resistance. For long-term cost savings, the module's low internal current consumption of 120mA reduces energy overhead in large systems.

Buying Guide & Purchasing Advice

Before ordering the Honeywell MLE-TN32A, confirm that your control system supports a 32-channel open collector output with a common method of 32 points per common. Verify the load voltage range of DC10.2V to 26.4V matches your application. BluePLC Industrial offers this module with verified stock and competitive pricing. Contact our team to check availability and lead times, as lifecycle status may vary. We recommend purchasing a spare unit for critical installations to minimize downtime.