Allen-Bradley 2198-DB42-F EMC Line Filter – Kinetix 5700

Allen-Bradley 2198-DB42-F: Three-Phase EMC Input Filter for Kinetix 5700 Dual-Axis Servo Drive Systems

The 2198-DB42-F occupies a structurally critical position in any Kinetix 5700 servo installation. Inserted between the upstream branch circuit protection and the L1/L2/L3 input terminals of the 2198-D series drive, it forms the first and only hardware barrier against high-frequency conducted emissions propagating from the drive’s PWM switching stage back onto the facility AC distribution network. Without this filter, switching transients generated at carrier frequencies typically between 4 kHz and 16 kHz — along with their harmonic sidebands extending into the MHz range — travel upstream through the supply impedance, coupling into adjacent instrumentation, safety relays, and communication buses. The 2198-DB42-F eliminates this propagation path through a combination of common-mode inductance and X/Y capacitor networks, providing attenuation compliant with EN 55011 Class A and Class B limits across the 150 kHz to 30 MHz conducted emission band.

Rated at 42 A continuous per phase at 200–480 V AC, 50/60 Hz, this filter is dimensionally matched to the Kinetix 5700 shared DC-bus architecture. It supports multi-axis configurations where a single filter services the entire shared-bus segment, reducing panel footprint and simplifying the EMC compliance documentation required under the EU Machinery Directive (2006/42/EC) and EMC Directive (2014/30/EU). For OEMs exporting CE-marked machinery into European or UK markets, specifying the 2198-DB42-F as a BOM line item — rather than attempting post-installation EMC remediation — is the lowest-cost path to certification.

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Technical Parameters

Hardware Logical Analysis

The internal topology of the 2198-DB42-F follows a two-stage LC ladder architecture. The first stage consists of a three-phase common-mode choke wound on a high-permeability nanocrystalline toroidal core. This geometry maximizes inductance per unit volume while maintaining low differential-mode impedance, ensuring that fundamental-frequency load current passes with minimal voltage drop (typically <0.5% at rated current) while presenting high impedance to common-mode noise currents. The second stage deploys X-capacitors across each phase pair for differential-mode attenuation and Y-capacitors from each phase to the protective earth (PE) conductor for common-mode current diversion.

The PE bonding path is the most mechanically critical element of the installation. Common-mode noise currents diverted by the Y-capacitors must return to the drive’s DC-bus midpoint via the shortest possible low-impedance ground path. Rockwell’s installation guide (2198-IN006) specifies a PE conductor cross-section of at least 10 mm² and a maximum bond resistance of 10 mΩ between the filter chassis and the cabinet backplate. Deviating from this specification — for example, by routing the PE conductor through a terminal strip rather than a direct lug connection — can increase the effective common-mode impedance by an order of magnitude, negating the filter’s attenuation performance at frequencies above 1 MHz.

The film capacitors used in the Y-network are self-healing metallized polypropylene types rated for continuous AC voltage stress at 55 °C ambient. This construction prevents catastrophic short-circuit failure modes that would compromise the PE conductor integrity — a failure mode that is explicitly prohibited under IEC 60950 and EN 61800-5-1 safety standards. The toroidal core material is selected for stable permeability across the 0–55 °C operating range, ensuring consistent attenuation performance across seasonal ambient temperature variation in non-climate-controlled production environments.

For shared DC-bus Kinetix 5700 configurations, the 2198-DB42-F is installed once per shared-bus segment, upstream of the 2198-S086-ERS4 or equivalent bus supply module. This single-filter topology is valid because the shared bus presents a unified AC input impedance to the supply network; individual axis modules do not generate independent conducted emission paths back to the AC supply. This architecture reduces the total filter count in a 6- or 8-axis system from six or eight units to one, with a corresponding reduction in panel wiring complexity and pressure drop across the filter bank.

System Integration Benefits

• CE/UKCA Compliance Acceleration: Using the 2198-DB42-F as specified in Rockwell’s EMC installation guide satisfies conducted emission requirements under EN 61800-3 without additional third-party filter selection or testing, reducing time-to-certification for machine builders targeting EU and UK markets.
• Deterministic Axis Response Preservation: By preventing supply-borne noise from re-entering the drive’s control power supply, the filter maintains stable ±0.1% DC bus voltage regulation, which directly supports the drive’s ability to execute velocity loop updates at the configured 62.5 µs or 125 µs servo period without jitter induced by supply disturbances.
• Adjacent Equipment Protection: Conducted emissions attenuated at the filter prevent interference with safety PLCs, vision systems, and fieldbus networks (EtherNet/IP, PROFINET) sharing the same distribution panel — eliminating a common root cause of intermittent communication faults in high-axis-count systems.
• Reduced Diagnostic Ambiguity: Installations with properly specified EMC filters produce cleaner diagnostic data from the Kinetix 5700’s integrated oscilloscope and drive logix functions, because supply noise does not mask genuine mechanical or electrical fault signatures in the current and velocity feedback channels.
• Single-Filter Shared-Bus Architecture: One 2198-DB42-F services an entire shared DC-bus segment, eliminating per-axis filter procurement, reducing panel footprint by up to 60% compared to individual-axis filtering, and simplifying the EMC compliance bill of materials.
• Thermal Stability in 55 °C Enclosures: The nanocrystalline core and self-healing film capacitors maintain rated performance at the upper operating limit, supporting installations in non-air-conditioned enclosures in foundry, press shop, and outdoor cabinet applications.
• UL/cUL Listing for North American Panel Builders: The filter carries UL and cUL listing, allowing North American OEMs to integrate it into UL 508A-listed control panels without field evaluation, preserving panel listing integrity and reducing insurance and liability exposure.
• Plug-Compatible Replacement: The 2198-DB42-F is a direct form-fit-function replacement for worn or damaged filters in existing Kinetix 5700 installations, with no firmware changes, parameter adjustments, or wiring modifications required beyond terminal reconnection.

Quality Assurance & Global Logistics

Every 2198-DB42-F unit offered through siemensplc.com is sourced as genuine Allen-Bradley / Rockwell Automation product. Our procurement process traces each unit to authorized distribution channels or verified secondary-market sources with documented chain of custody. Prior to listing, each unit undergoes a structured incoming inspection protocol: catalog number and date code verification against Rockwell’s published label format, holographic label authentication, continuity and insulation resistance measurement on all phase-to-PE and phase-to-phase capacitor networks, and visual inspection of terminal blocks, core windings, and enclosure integrity. Units that fail any inspection criterion are quarantined and not offered for sale.

Shipping operations are based in Xiamen, China — a major international logistics hub with direct access to DHL Express, FedEx International Priority, UPS Worldwide Express, and SF International services. Standard dispatch lead time is 3–5 business days from order confirmation. Expedited same-day or next-day dispatch is available for in-stock units with confirmed payment by 14:00 CST. All international shipments include a complete export documentation package: commercial invoice, packing list, certificate of origin, and — upon request — a certificate of conformity referencing the applicable Rockwell Automation quality standards. Customs HS code 8536.90 is applied by default; alternative classification is available upon written request for specific destination country requirements. The 12-month warranty covers defects in materials and workmanship from the date of shipment. Warranty claims are processed within 5 business days of receipt of the returned unit.

Contact Information

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