Honeywell 2MLP-AC23 MasterLogic-200 Power Supply Modules

Configured for power conversion in MasterLogic PLC systems, the Honeywell 2MLP-AC23 (2MLP-AC23 Power Supply Module) provides direct physical/electrical execution. The unit converts high-voltage AC utility power into stabilized low-voltage DC backplane power to drive logical processing and I/O communication across the MasterLogic-200 platform.

Hardware Specifications

Power Distribution and Deterministic Backplane Execution

• Backplane Bus Communication Velocity: The module provides stable 5 VDC power directly to the MasterLogic passive backplane, ensuring voltage ripple is kept below critical thresholds to maintain error-free high-speed bus communication and deterministic I/O scan times.
• Over-Current and Over-Voltage Limits: Integrated protection circuits trip when output current exceeds 9.0 A or output voltage rises between 5.5 and 6.5 VDC, isolating the backplane and preventing damage to adjacent CPU and I/O cards.
• Inrush Current and Interruption Immunity: Internal circuitry limits inrush current to 20 A Peak or less at startup, while a holdup time circuit sustains full 5 VDC backplane power during instantaneous input power interruptions of 10 ms or shorter.

Frequently Asked Questions

Q: What is the meaning of the "Voltage Indicator" LED on the front panel of the 2MLP-AC23?

A: The green LED remains illuminated when the internal 5 VDC output is operating within its normal regulated tolerance (+/- 2%). If this LED turns off while input AC power is verified, it indicates an internal over-current, over-voltage, or hardware fault condition.

Q: Can the internal input fuse of the 2MLP-AC23 be replaced by field maintenance technicians?

A: No. The internal input fuse is a built-in UL standard slow-blow type and is not user-serviceable. If the fuse blows due to a severe internal electrical fault, the complete module must be replaced to maintain system certification.

Field Installation Guidelines

• Terminal Wire Sizing: Field power connections must be made using stranded copper wire with a cross-sectional area of 0.75 to 2 mm2. Use only approved compressed terminal lugs (such as RAV 1.25 - 3.5 or RAV 2 - 3.5).
• Ventilation Clearance: Mount the power supply module vertically on the DIN-rail or backplate. Maintain a minimum clearance of 50 mm above and below the module to allow natural convection airflow and prevent thermal overload.
• Protective Grounding: Connect the FG (Frame Ground) terminal directly to the main cabinet ground bar using the shortest possible path of low-impedance ground wire to suppress electromagnetic noise.