Industrial EMC Filter VN11587-EMC – Noise Suppression for Drives, PLCs, and Servo Systems

The VN11587-EMC is designed to help control cabinets pass conducted and radiated emission limits more reliably, especially around variable frequency drives, servo amplifiers, and switching power supplies. From my experience, dropping an EMC filter near the mains entry is often the quickest way to tame high-frequency noise that trips RCDs or fails compliance testing. You might notice that it’s a passive, line-level filter—no programming, no firmware—just cleaner power in and out.

Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: Typically 1 week if in stock; no more than one month at the latest
• Payment terms: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• Effective mains filtering – Helps reduce conducted EMI back to the grid and radiated emissions inside the cabinet, which typically supports compliance with industrial EMC standards.
• Passive design – No external power or firmware; it simply cleans up the line. This reduces points of failure and makes commissioning quick.
• Cabinet-friendly mounting – Usually installed near the cabinet mains entry for best performance; short leads and solid PE bonding improve attenuation.
• Improves drive stability – In many cases, prevents nuisance trips on VFDs/servos caused by upstream noise or RCD sensitivity.
• Clean/dirty segregation – Supports better cable zoning (line side vs. load side), which is a practical win during EMC audits.
• Low maintenance – Aside from periodic tightening of terminals and checking bonding, there’s almost nothing to service.

Typical use cases include: machine tools with multiple VFD axes, packaging lines with fast I/O and switching PSUs, conveyors with long motor cables, and test benches where sensitive instruments share mains with high-power loads. One thing I appreciate is how often it shortens EMC lab time—seems to be a common outcome according to customers.

Technical Specifications

Related or Supporting Products

• Line Reactor LR3-xx – Three-phase AC line choke to reduce harmonics and protect VFDs; typically used upstream of drives together with EMC filters.
• dv/dt Output Filter DVF-480-xx – Limits motor cable voltage spikes and radiated noise, helpful for long cable runs.
• Shield Clamp Kit SC-EMC-30 – For proper 360° shield termination on motor and I/O cables; improves high-frequency grounding.
• Grounding Bar GB-10P – Common PE/ground busbar for short, low-impedance earth bonds inside the panel.
• Low-Ripple DIN-Rail PSU DRP-24V-120W – Clean 24 Vdc supply to keep control electronics quieter on the DC side.

Feedback from a packaging OEM: “We struggled to pass emissions with three small VFDs on one cabinet. Installing the VN11587-EMC at the mains entry and adding shield clamps cut the noise enough that the lab signed off the same day.”

Installation & Maintenance

• Mounting position – Install as close as practical to the cabinet’s power entry. Keep the “line” and “load” wiring physically separated to avoid re-coupling.
• Earthing – Use a short, wide PE bond from the filter to the backplate. A low-impedance ground path is key to high-frequency attenuation.
• Wiring – Keep lead lengths short and parallel routing to a minimum. Use ferrules and torque terminals to manufacturer recommendations.
• Thermal and spacing – Leave adequate ventilation space; avoid mounting next to hot drives without a thermal barrier. Derating may apply in warmer cabinets.
• RCD consideration – Leakage current can trip sensitive RCDs; select RCD types (e.g., Type B or industrial units) appropriate for filtered VFD systems.
• Routine checks – Every 6–12 months, retorque terminals, inspect PE bonds, and clean dust from vents and surfaces to maintain performance.

Quality & Certifications

• Compliance – Designed for industrial EMC applications; typically aligned with CE EMC requirements and RoHS directives.
• Safety – UL/CSA recognition may apply depending on the exact current/voltage variant; request the label data if needed for your file.
• Manufacturing – Built under ISO 9001 quality systems in most cases for consistent performance.
• Warranty – 12-month warranty (365 days) from delivery date.