The Messung 4110 (often part of the X-Line or NexgenIE series) is a regulated DC switch-mode power supply designed specifically for industrial automation and PLC systems.1 Messung, an Indian pioneer in PLC technology (now partnered with Mitsubishi Electric), designed these to be highly reliable in environments with fluctuating input voltages.
1. Key Specifications
The 4110 series is built for standard control cabinet duty:
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Input Voltage: Wide range 100V – 240V AC (Single Phase).
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Output Voltage: 24V DC (Regulated).
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Output Current: Typically 2.5A or 5A (depending on the specific sub-variant, though the 4110 is commonly the 2.5A model).
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Efficiency: $> 80\%$, meaning it generates very little heat during operation.
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Mounting: Standard 35 mm DIN Rail mounting.
2. Protection Features
One of the reasons this power supply is favored for PLC applications is its internal protection circuitry:
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Short Circuit Protection: Automatically limits current or shuts down to prevent fire/damage if a short occurs on the field wiring.2
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Overload Protection: Protects the internal components if the connected load exceeds the rated capacity.
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Overvoltage Protection: Ensures that if the internal regulator fails, it won’t “fry” the sensitive 3$24V$ electronics (PLC/HMI) connected to it.4
3. Wiring and Terminals
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Input (L, N, PE): Located at the bottom or top depending on the revision. Always ensure the Protective Earth (PE) is connected to reduce electrical noise in the PLC system.
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Output (+V, -V): Usually provided as dual terminals to make it easier to power both a PLC and an HMI from the same unit without “daisy-chaining” wires.
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LED Indicator: A “DC OK” green LED on the front panel indicates that the unit is healthy and producing the correct voltage.
4. Technical Table
| Feature | Details |
| Model | 4110 |
| Type | Switch Mode Power Supply (SMPS) |
| Cooling | Natural Convection (No fan required) |
| Housing | Rugged Plastic or Metal (Industrial Grade) |
| Isolation | 3kV AC (Input to Output) |
| Operating Temp | 0°C to 55°C |
5. Common Use Cases
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PLC Power: Providing clean power to Messung NexgenIE or Mitsubishi FX series PLCs.
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Sensor Loops: Powering 4-20mA or 0-10V analog sensors which require stable DC voltage.
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HMI Power: Driving the backlights and processors of touch panels (like the Pro-face or Delta models previously discussed).
Maintenance Tip:
If the “DC OK” LED is blinking or off, disconnect the output wires and check the voltage with a multimeter. If the voltage returns to $24V$ when the wires are removed, there is a short circuit in your field wiring or a faulty sensor drawing too much current.












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