MACX/MCR-UI-UI-SP PHOENIX

Phoenix Contact filter modules act as high-efficiency suppressors installed on DIN rails within control cabinets to shield sensitive devices—such as PLCs, sensors, drives, and instrumentation—from high-frequency transient disturbances, voltage spikes, and electromagnetic noise generated by heavy industrial machinery, frequency converters, or switching power supplies. Available in single-phase and three-phase power line variants as well as dedicated signal-line surge and interference protection series, these modules utilize passive LC filter networks combining high-performance chokes and capacitors. They prevent incoming external noise from entering vulnerable equipment and prevent internal equipment noise from radiating back into the plant power grid.

Product Parameters

• Nominal Operating Voltage: 24 VDC for signal and control circuits; 120 VAC, 230 VAC single-phase, or 400/480 VAC three-phase for power line filters.

• Maximum Continuous Current: Rated current options ranging from 1 A up to 20 A depending on the module series and circuit application.

• Frequency Range: Operating frequency of 50 Hz or 60 Hz for AC systems; direct current (DC) operation for low-voltage control circuits.

• Attenuation Frequency: High-frequency interference suppression effective across frequencies from 150 kHz up to 30 MHz.

• Insertion Loss: Typical attenuation values greater than 40 dB across primary noise bandwidths.

• Housing and Mounting: Compact, flame-retardant polyamide enclosures designed for standard 35 mm DIN-rail mounting.

• Connection Technology: Push-in technology or screw-clamp connection blocks accepting conductor cross-sections from 0.2 mm² to 6 mm².

• Operating Temperature Range: Industrial standard operation from -25°C to +70°C (-13°F to +158°F).

• Degree of Protection: IP20 rating for installation in enclosed control cabinets or protective housing.

• Standards Compliance: Conforms to IEC/EN 60939, UL 1283, and standard industrial EMC directive requirements.

Product Advantages

Phoenix Contact filter modules significantly improve overall control system reliability by preventing high-frequency noise from causing false sensor signals, processor resets, or data transmission errors.

The compact DIN-rail form factor saves valuable panel space while enabling rapid installation directly alongside protected hardware.

Integrated Push-in wiring technology drastically reduces installation time and delivers maintenance-free, vibration-proof connections suitable for harsh industrial conditions.

Effective suppression of electromagnetic interference helps industrial installations meet strict global EMC compliance standards without requiring complex custom shielding solutions.

Protecting sensitive downstream electronics against persistent high-frequency voltage stress extends equipment service life and lowers maintenance costs.

Important Considerations and Precautions

Always connect the ground line (PE) using the shortest, thickest possible conductor to ensure a low-impedance path to earth, as effective high-frequency noise dissipation relies entirely on a proper grounding connection.

Ensure that the nominal current rating of the chosen filter module meets or exceeds the maximum continuous current draw of all connected downstream loads to prevent overheating or unwanted voltage drops.

Maintain physical separation between unfiltered input wiring and filtered output wiring to prevent cross-coupling of high-frequency noise back into the clean power or signal lines.

Verify that the ambient temperature inside the control cabinet remains within the operating specification to avoid thermal derating of the internal inductive components.

Do not conduct high-voltage insulation tests on equipment with connected filter modules without disconnecting the filters first, as high voltages can damage internal suppression capacitors.

Product Applications

Phoenix Contact filter modules are extensively deployed across industrial manufacturing and infrastructure setups where electrical noise immunity is critical.

• Machine Building: Protecting sensitive programmable automation controllers and digital sensors from electrical noise generated by nearby variable frequency drives (VFDs) and heavy motors.

• Process Instrumentation: Filtering power and signal lines connected to delicate flow meters, temperature transmitters, and analytical sensors to maintain precise measurements.

• Power Distribution Cabinets: Attenuating high-frequency mains interference entering control panels from dirty factory power grids.

• Robotics and Motion Control: Suppressing switching noise and voltage harmonics produced by multi-axis servo drive power supplies.

• Renewable Energy Installations: Shielding control electronics in wind turbine nacelles and solar power inverter stations from high-frequency grid disturbances.

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