Product Overview

The Honeywell MLE-DC16A is a high-density digital input expansion module designed for the MasterLogic ML50 Programmable Logic Controller (PLC) family. This component is engineered to provide the primary interface for 24V DC discrete field signals, allowing the PLC to monitor the status of switches, sensors, and other binary devices. To ensure maximum system integrity and protection against electrical noise, the MLE-DC16A utilizes photo-coupler isolation for every input point.

As a versatile I/O solution, the MLE-DC16A integrates seamlessly into broader Honeywell architectures, including Experion PKS and SCADA environments. Its robust hardware design is optimized for high-speed signal acquisition, delivering the deterministic performance required for complex machine control and process automation tasks.

Hardware Parameters and Technical Specifications

The MLE-DC16A is built to rigorous industrial standards, providing a compact footprint without sacrificing electrical safety or signal precision.

• Input Points: 16 Channels (Sink/Source)

• Rated Input Voltage: 24V DC (Operational range: 20.4V to 28.8V)

• Rated Input Current: 4mA per channel

• Detection Thresholds: ON voltage ≥ 19V DC (at ≥ 3mA); OFF voltage ≤ 6V DC (at ≤ 1mA)

• Isolation Method: Photo-coupler insulation for enhanced transient protection

• Insurance Resistance: 10MΩ or higher

• Dielectric Strength: Withstands AC 560Vrms for 3 cycles

• Network Interoperability: Compatible with Modbus, Profibus DP, and DeviceNet protocols

• Maintenance Features: Supports hot-swapping and onboard self-diagnostics

• Weight: 0.4 kg

• Dimensions: 7 x 14 x 14.5 cm

• Origin: USA

Industrial Applications

The Honeywell MLE-DC16A is deployed across various sectors where reliable discrete signal processing is critical for safety and efficiency:

• Machine Automation: Monitoring limit switches and proximity sensors on high-speed packaging or assembly lines.

• Manufacturing Control: Serving as a digital interface for motor starter auxiliary contacts and emergency stop circuits in heavy industrial plants.

• Energy Management: Tracking the status of circuit breakers and disconnect switches within electrical distribution panels.

• Process Infrastructure: Integrating field-level status indicators from pumps, fans, and valves into a centralized Experion PKS or SCADA monitoring system.