Bently Nevada CB2W100-064 Retrofit-Ready Proximity Cable

Bently Nevada CB2W100-064 Retrofit-Ready Proximity Interconnect Cable for 330130 XL Control Systems

The Bently Nevada CB2W100-064 is a 64-foot (approximately 20-meter) proximity interconnect cable engineered as a direct retrofit replacement for legacy Bently Nevada 330130 XL Series vibration monitoring systems. Designed for industrial machinery protection and condition monitoring applications, this cable serves as the critical signal link between proximity probes and the 3300 Series or System 1 monitoring rack modules. Whether you are upgrading an aging turbomachinery protection system, replacing a failed cable in a running plant, or migrating from discontinued 330130 assemblies to current-generation hardware, the CB2W100-064 provides a verified, drop-in compatible solution with no firmware changes or rack reconfiguration required.

In retrofit and modernization projects, the interconnect cable is frequently the overlooked component — yet it is the one most likely to degrade over years of exposure to heat, vibration, and chemical environments. A faulty or mismatched cable introduces signal noise, affects gap voltage readings, and can trigger false alarms or missed trips in your machinery protection logic. Specifying the correct CB2W100-064 ensures that your 3300 XL 8mm Proximity Transducer System operates within Bently Nevada’s published sensitivity and linearity specifications from day one of commissioning.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

A successful retrofit of a Bently Nevada proximity monitoring loop requires careful coordination of multiple components beyond the cable itself. When replacing a 330130 XL assembly, engineers should audit the full signal chain: starting from the 330180 8mm Proximity Probe at the machine casing, through the 330130 Extension Cable (if a two-piece assembly is in use), into the 3300 XL Proximitor Sensor (driver), and finally terminating at the 3500/42M Proximitor/Seismic Monitor rack module. Each element must be verified for length compatibility and impedance matching before the CB2W100-064 is installed.

For plants running the Bently Nevada 3500 Series machinery protection rack, the CB2W100-064 integrates directly with existing I/O terminal blocks without rewiring. However, if the site is migrating from an older 7200 Series or 9000 Series monitoring system, terminal block adapters and signal conditioners may be required. In these cases, the 3500/20 Rack Interface I/O Module and 3500/22M Transient Data Interface should be reviewed for compatibility with the new cable routing.

Plants operating mixed-vendor environments — for example, combining Bently Nevada proximity channels with Emerson AMS Device Manager or integrating into a DeltaV SIS safety instrumented system — should confirm that the analog signal from the CB2W100-064 is correctly scaled at the marshalling cabinet before connecting to the DCS I/O cards. Where the control system uses a Rockwell Automation ControlLogix or Siemens S7-400 platform for supervisory logic, the 4–20 mA or ±10 V output from the Proximitor must be mapped to the correct analog input channel and engineering unit scaling in the PLC program. Failure to update the tag database and HMI faceplate scaling in FactoryTalk View SE or WinCC after cable replacement is a common source of post-retrofit alarm nuisance.

For I/O expansion projects where additional vibration channels are being added to an existing 3500 rack, the CB2W100-064 is the standard interconnect for new probe installations alongside the 3500/40M Proximitor/Seismic Monitor expansion modules. Rack backplane slot assignments and module addressing must be updated in the Rack Configuration Software (RCS) before the new channels go live.

Downtime Control During System Migration

Minimizing unplanned downtime during a proximity cable replacement is achievable with disciplined pre-outage preparation. Before the maintenance window opens, technicians should pre-terminate the CB2W100-064 at both ends, label all conductors against the existing as-built drawings, and bench-test the cable continuity and shield integrity. A spare 3300 XL Proximitor Sensor should be staged at the work site so that the driver and cable can be tested as a matched pair before installation on the machine.

During the outage, the original program logic in the 3500 Rack should be exported and archived before any hardware is disturbed. If the rack is connected to a System 1 Evolution condition monitoring platform, the historian configuration and alarm setpoints should be backed up to prevent data loss. Once the CB2W100-064 is installed and the gap voltage is confirmed within specification (typically –10 to –18 VDC at the operating air gap), the rack can be returned to service without requiring a full system restart — preserving control continuity for adjacent monitoring channels that were not part of the retrofit scope.

For sites where a hot-swap is not possible and a full rack power-down is required, coordinating the cable replacement with a planned 3500/15 Power Supply Module inspection is recommended to maximize the value of the maintenance window. All changes should be documented in the site’s Management of Change (MOC) system before the unit is returned to normal operation.

Retrofit Support FAQ

Q1: Is the CB2W100-064 a direct replacement for the Bently Nevada 330130 XL interconnect cable?
Yes. The CB2W100-064 is designed as a verified drop-in replacement for the 330130 XL Series proximity interconnect cable. Connector types, signal characteristics, and impedance are matched to the original specification. No rack reconfiguration or firmware update is required for standard 3300 XL and 3500 Series installations.

Q2: What gap voltage should I verify after installing the CB2W100-064?
After installation, confirm that the Proximitor output gap voltage reads between –10 VDC and –18 VDC at the nominal operating air gap for your probe model. Readings outside this range indicate a probe-cable length mismatch, incorrect driver tuning, or a wiring fault that must be resolved before the channel is returned to service.

Q3: Does this cable require any special termination or shielding at the marshalling cabinet?
The CB2W100-064 uses a standard coaxial construction with a continuous shield. The shield should be grounded at one end only (typically at the Proximitor/driver end) to prevent ground loops. At the marshalling cabinet, ensure the shield drain wire is isolated from the cabinet ground rail unless your site standard specifies otherwise. Refer to Bently Nevada installation drawing 141536-01 for terminal block wiring details.

Q4: What warranty and pre-shipment testing does this unit include?
Every CB2W100-064 unit is subject to continuity, insulation resistance, and shield integrity testing prior to shipment. The unit is covered by a 12-month warranty against manufacturing defects from the date of delivery. Warranty claims are supported by SMARTNEXMSK’s technical team; contact sales@smartnexmsk.com with your order number and a description of the fault.

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