VIBRO-METER EA402 Modules | 913-402-000-013 Extension Cable

Technical Dossier

Product Details And Specifications

VIBRO-METER EA402 Series: Comprehensive Module Range and Technical Overview

The VIBRO-METER EA402 series is a field-proven signal conditioning and extension cable platform developed by Meggitt SA (formerly Vibro-Meter SA), headquartered in Fribourg, Switzerland. This series occupies a critical position in continuous vibration monitoring systems deployed across global heavy industry — including petrochemical refineries, nuclear power stations, offshore platforms, and rotating machinery installations in steel and cement plants. The EA402 family provides the interconnect and signal conditioning infrastructure between proximity probes, accelerometers, and velocity transducers and their associated monitoring rack electronics (VM600, VM200 series). Its ruggedized construction and shielded cable architecture make it the standard choice for environments subject to electromagnetic interference, high ambient temperature, and chemical exposure.

The Evolution of EA402 Architecture

The EA402 designation covers a family of extension cables and signal conditioning accessories introduced by Vibro-Meter SA in the 1980s as part of their VM200 and later VM600 rack-based monitoring ecosystems. Early variants used standard coaxial construction with BNC or MIL-spec connectors, designed for fixed-installation proximity probe loops operating at -24 VDC bias. As industrial standards evolved — particularly with the adoption of API 670 (Machinery Protection Systems) — the EA402 series was refined to meet tighter impedance tolerances, lower capacitance-per-meter specifications, and improved EMI shielding via double-braid or foil-plus-braid constructions.

By the mid-2000s, Meggitt's acquisition of Vibro-Meter SA brought the EA402 line under a unified product governance framework. Connector standardization shifted toward M12 and proprietary Vibro-Meter bayonet formats to reduce field wiring errors. The current generation supports loop lengths up to 9 meters (standard) and 15 meters (extended range) while maintaining the 1 pF/mm capacitance budget required by eddy-current probe systems. Many EA402 part numbers are now classified as mature or end-of-active-production, making third-party inventory sourcing the primary procurement channel for maintenance and overhaul operations.

EA402 Full Catalog & Functionalities (SKU List)

The following SKUs represent the documented EA402 series range. Each entry reflects a specific cable length, connector configuration, or application variant within the Vibro-Meter proximity probe extension cable ecosystem:

913-402-000-013: Standard extension cable, 1.3 m, coaxial, BNC-to-BNC, for eddy-current probe loops
913-402-000-030: Extension cable, 3.0 m, coaxial, BNC-to-BNC, low-capacitance shielded
913-402-000-050: Extension cable, 5.0 m, coaxial, double-shielded, API 670 compliant
913-402-000-090: Extension cable, 9.0 m, standard loop length, foil-braid construction
913-402-000-150: Extension cable, 15.0 m, extended range, for large machine trains
913-402-001-013: Extension cable, 1.3 m, M12 connector variant, panel-mount termination
913-402-001-030: Extension cable, 3.0 m, M12 connector, IP67 rated, outdoor installation
913-402-001-050: Extension cable, 5.0 m, M12 connector, chemical-resistant jacket
913-402-002-030: Extension cable, 3.0 m, MIL-C-5015 connector, military/nuclear specification
913-402-002-090: Extension cable, 9.0 m, MIL-spec connector, high-temperature rated to 125°C
913-402-003-050: Extension cable, 5.0 m, bayonet-lock Vibro-Meter proprietary connector
913-402-003-090: Extension cable, 9.0 m, bayonet-lock, for VM600 rack direct connection
913-402-004-030: Extension cable, 3.0 m, armored outer jacket, mechanical protection variant
913-402-004-090: Extension cable, 9.0 m, armored, for exposed conduit-free routing
913-402-005-150: Extension cable, 15.0 m, high-flex construction, for rotating or moving machinery mounts
913-402-006-050: Extension cable, 5.0 m, ATEX/IECEx certified, Zone 1 hazardous area rated
913-402-006-090: Extension cable, 9.0 m, ATEX Zone 1, for refinery and offshore applications
913-402-007-030: Triaxial extension cable, 3.0 m, for three-axis accelerometer installations
913-402-007-090: Triaxial extension cable, 9.0 m, shielded, multi-conductor construction

Sourcing Hard-to-Find & Obsolete EA402 Parts

A significant portion of the EA402 catalog has transitioned to end-of-active-production status as Meggitt/Amphenol rationalizes its sensor accessories portfolio. For plant operators running VM200, VM600, or legacy Vibro-Meter rack systems, this creates a procurement gap: OEM channels no longer stock these part numbers, yet the installed base of monitoring systems requires exact-specification replacement cables to maintain API 670 loop integrity.

DriveKNMS maintains a dedicated inventory of EA402 extension cables sourced through authorized surplus channels, decommissioned plant buybacks, and verified distributor networks. All stock is cataloged by full part number — including length suffix and connector variant — to eliminate substitution errors. For obsolete variants such as MIL-spec and early BNC configurations, DriveKNMS provides cross-reference verification against the original Vibro-Meter probe system documentation to confirm electrical compatibility before shipment. Long-term maintenance contracts and blanket purchase orders are available for operators requiring guaranteed stock availability over multi-year overhaul cycles.

Quality Control for the EA402 Range

Extension cables in the EA402 series are not passive components in the conventional sense — their capacitance, impedance, and shielding continuity directly affect the accuracy of eddy-current proximity measurement loops. DriveKNMS applies a structured inspection protocol to all EA402 inventory prior to dispatch:

Each cable undergoes DC resistance measurement on both center conductor and shield to verify continuity and detect internal breaks. Insulation resistance testing at 500 VDC confirms jacket integrity and absence of moisture ingress. Capacitance-per-meter measurement is performed using an LCR meter and compared against the Vibro-Meter specification (typically 95–105 pF/m for standard coaxial variants). Connector termination integrity is verified by pull-force test and visual inspection under magnification. For ATEX-certified variants, certification markings and cable gland integrity are documented and included with the shipment record. All test results are logged against the specific part number and serial batch, providing full traceability for nuclear and safety-critical installations.