Bently Nevada 330104-00-08-10-02-CN Proximity Probe for 3300

Bently Nevada 330104-00-08-10-02-CN Proximity Probe for 3300 Series

The Bently Nevada 330104-00-08-10-02-CN is a precision eddy-current proximity probe engineered as a core sensing element within the 3300 Series machinery protection and condition monitoring architecture. Rather than functioning as a standalone transducer, this probe is designed to operate as an integrated component within a layered industrial automation system — delivering continuous, high-resolution shaft displacement and vibration data to upstream monitoring modules, control platforms, and safety shutdown systems. Its role spans the sensing layer through to the control and decision layer, making it a foundational element in any rotating machinery protection strategy.

In a complete 3300 Series system architecture, the 330104-00-08-10-02-CN works in close coordination with the Bently Nevada 330130 extension cable, the 330180 proximitor/oscillator, and the 3300/16 16-channel monitor rack. The proximitor converts the probe’s raw electromagnetic signal into a calibrated voltage output — typically –24 VDC at full gap — which is then routed to the 3500/42M or 3500/45 position and velocity monitor cards housed within the 3500 Series rack. This signal chain ensures that shaft radial vibration, axial position, and differential expansion data are continuously available to the plant DCS or safety instrumented system (SIS) via Modbus RTU, FOUNDATION Fieldbus, or Profibus DP communication interfaces.

At the control layer, the 330104-00-08-10-02-CN integrates with Bently Nevada’s System 1 condition monitoring software platform, enabling real-time trend analysis, alarm management, and predictive maintenance scheduling. The probe’s output feeds directly into the 3500 rack’s I/O modules, which in turn communicate with the plant’s primary PLC or DCS — such as a GE Mark VIe turbine control system or an ABB 800xA distributed control system — through hardwired 4–20 mA analog signals or digital fieldbus protocols. This multi-layer integration ensures that vibration exceedances trigger coordinated responses across the control architecture, from alarm annunciation at the HMI layer to automatic trip commands at the relay output module level.

The probe’s 8 mm tip diameter and standard 10-foot (3 m) armored cable configuration make it compatible with the majority of 3300 Series mounting brackets and probe holders used in steam turbines, gas compressors, centrifugal pumps, and large electric motors. Its –24 VDC bias voltage requirement aligns with the standard power supply output of the 3300/20 power supply module, ensuring seamless integration without additional signal conditioning hardware. For redundant monitoring architectures — common in API 670-compliant installations — two 330104-00-08-10-02-CN probes are typically installed at 90° X–Y orientation on each bearing journal, with each probe connected to a separate channel on the 3500/42M monitor card to provide fully independent vibration measurement paths.

Product Specification Table

System Compatibility Notes

Deploying the 330104-00-08-10-02-CN within a complete machinery protection architecture requires careful coordination across multiple system layers. At the signal conditioning layer, the 330180 proximitor/oscillator is the direct interface partner, converting the probe’s electromagnetic gap signal into a buffered voltage output suitable for long-distance transmission to the monitor rack. The 330130 extension cable bridges the physical distance between the probe and proximitor in installations where the bearing housing is remote from the junction box or marshalling cabinet.

Within the monitor rack, the 3500/42M four-channel position monitor or the 3500/45 position monitor card receives the conditioned signal and applies configurable alarm setpoints for direct vibration (Xpp), gap voltage, and 1X/2X vector components. The 3500/01 rack power supply and 3500/05 system monitor card provide the infrastructure backbone, while the 3500/92 communication gateway module enables Modbus TCP/IP or OPC-DA connectivity to the plant historian or DCS. For installations requiring relay-based trip outputs, the 3500/32 four-relay output module translates monitor alarm states into hardwired trip signals routed to the turbine trip solenoid or compressor anti-surge valve actuator.

At the HMI and visualization layer, System 1 Evolution software aggregates data from multiple 330104-00-08-10-02-CN probe channels across the machine train — including HP turbine, LP turbine, and generator bearing positions — presenting unified orbit plots, Bode diagrams, and cascade spectra for engineering analysis. This system integration of probe data across the full machine train is what transforms individual sensor readings into actionable machinery health intelligence.

Industrial Application Notes

In power generation facilities, the 330104-00-08-10-02-CN is routinely deployed on steam turbine bearing journals as part of an API 670-compliant protection system. Paired with the 3500 Series monitor rack and integrated with the GE Mark VIe or Emerson Ovation DCS, the probe provides the continuous shaft vibration data required for both operational monitoring and automatic trip logic. During startup and coast-down sequences, the probe’s DC-to-10 kHz frequency response captures critical resonance crossings and critical speed data that inform rotor dynamic analysis.

In petrochemical and refinery applications, the probe is used on centrifugal compressors and process pumps where API 670 protection is mandated by process safety management (PSM) regulations. The probe’s high-temperature rating — up to 177°C at the tip — makes it suitable for hot-section installations near process gas streams. In these environments, the 330104-00-08-10-02-CN is integrated with the plant’s SIS via hardwired trip outputs from the 3500/32 relay module, ensuring that vibration-initiated trips are executed independently of the DCS control layer in compliance with IEC 61511 functional safety requirements.

In mining and mineral processing, the probe monitors large induced-draft fans, ball mill pinion bearings, and crusher drive motors — applications where bearing failure can cause extended unplanned downtime. The probe’s rugged armored cable construction and wide operating temperature range make it well-suited to the harsh environments typical of these installations. Integration with the plant’s SCADA system via the 3500/92 Modbus gateway provides operations teams with real-time vibration trending data at the control room HMI.

Product Compatibility FAQ

Q1: Is the 330104-00-08-10-02-CN directly compatible with the 3500 Series monitor rack without additional signal conditioning?
A: The probe requires a 330180 proximitor/oscillator as an intermediate signal conditioner between the probe and the 3500 Series monitor card. The proximitor provides the –24 VDC excitation to the probe and converts the raw electromagnetic signal to a calibrated voltage output. The 3500 monitor card then receives this conditioned signal directly. No additional signal conditioning hardware is required when the correct proximitor model is selected for the probe’s tip diameter and cable length combination.

Q2: Can this probe be used in a redundant X–Y vibration monitoring configuration compliant with API 670?
A: Yes. API 670 requires two probes per bearing journal installed at 90° X–Y orientation for radial vibration measurement. Two 330104-00-08-10-02-CN probes, each connected to a separate 330180 proximitor and routed to independent channels on the 3500/42M monitor card, fulfill this requirement. Each channel operates independently, ensuring that a single probe or cable failure does not compromise the protection function of the complementary channel. This architecture also supports the 3500 rack’s dual-voting trip logic for enhanced safety integrity.

Q3: What does the 12-Month Warranty cover, and how does it support long-term maintenance planning?
A: The 12-Month Warranty covers manufacturing defects and functional failures under normal operating conditions from the date of shipment. For maintenance planning purposes, this warranty period aligns with typical annual turnaround and inspection cycles in power generation and petrochemical facilities, allowing engineering teams to schedule probe replacement or recalibration during planned outages with confidence in the replacement unit’s performance. Warranty claims are supported by our technical team at plc.sales@zyplc.com, with replacement units dispatched to minimize system downtime.

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