Axial conversion
The integrated Proximitor Sensor in Bently Nevada 991-01-XX-01-CN MOD: 284318-01 conditions the 3300 NSv probe response into axial-position engineering units.
Bently Nevada · Machinery Monitoring HardwareMoore Automation · Technical Record
Bently Nevada · 991 Thrust Transmitter
Bently Nevada 991-01-XX-01-CN MOD: 284318-01
| 991 Thrust Transmitter
AXIAL DISPLACEMENT · 4–20 MA · CHINA CN MOD RECORD
Complete model · 991-01-XX-01-CN MOD: 284318-01
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Product Description
Bently Nevada 991-01-XX-01-CN MOD: 284318-01 is a 991 two-wire thrust transmitter record with a CN regional approval suffix and the supplied MOD identity. It converts axial shaft displacement from a matched 3300 NSv proximity system into a proportional 4–20 mA signal.
In the signal path, Bently Nevada 991-01-XX-01-CN MOD: 284318-01 accepts the probe and extension-cable response, conditions it with the integrated Proximitor Sensor and passes the axial-position value to the machinery control input. The XX system-length field remains customer-specified in the supplied identifier.
The 35 mm DIN-rail mounting field, CN approval field and MOD: 284318-01 on Bently Nevada 991-01-XX-01-CN MOD: 284318-01 are part of the exact record. They should remain visible with the 0–1 mil range selection.
02
Technical Data
- Brand
- Bently Nevada
- Complete model
- 991-01-XX-01-CN MOD: 284318-01
- Product type
- 991 two-wire thrust transmitter
- Measured variable
- Axial shaft displacement
- Full-scale field
- 01 = 0–1 mil nominal
- System length
- XX = customer-specified field
- Mounting
- 01 = 35 mm DIN-rail clips
- Approval
- CN country-specific China execution
- MOD
- 284318-01 retained exactly
- Input system
- 3300 NSv probe and matched extension
- Output
- 4–20 mA loop
- Supply
- +12 to +35 Vdc
- Accuracy
- ±1.5% loop accuracy
- Buffered output
- Non-isolated PROX OUT and COM
- Mounting alternatives
- DIN clips or bulkhead screws by option
- Humidity
- Potted construction up to 100% condensing
- Adjustments
- Zero and span
- Protection circuits
- Power-up inhibit and Not OK/signal defeat
03
Product Functions
Bently Nevada 991-01-XX-01-CN MOD: 284318-01 translates axial displacement into a current-loop value while keeping a diagnostic probe output available.
Loop output
The two-wire loop delivers the proportional 4–20 mA value from Bently Nevada 991-01-XX-01-CN MOD: 284318-01 to the control input.
Diagnostic output
The non-isolated PROX OUT and COM terminals plus coaxial connector expose the dynamic and gap signal for diagnostics.
04
Diagnostics and Protection
Bently Nevada 991-01-XX-01-CN MOD: 284318-01 includes circuits that keep a probe or loop fault from being interpreted as a valid high thrust value.
Power-up inhibit
The power-up inhibit circuit on Bently Nevada 991-01-XX-01-CN MOD: 284318-01 suppresses signal errors caused by supply transients.
Not OK defeat
The Not OK/signal defeat circuit prevents a faulty probe or loose connection from producing a false high output.
Adjustment access
Zero and span potentiometers allow the installed loop to be adjusted against the documented mechanical reference.
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Product Q&A
Why can the axial value from Bently Nevada 991-01-XX-01-CN MOD: 284318-01 look wrong after commissioning?
For Bently Nevada 991-01-XX-01-CN MOD: 284318-01, verify the probe target gap, the 0–1 mil range and the zero/span adjustment before changing the PLC scale. The XX field must also match the actual probe and extension system length.
What does the CN MOD record mean for Bently Nevada 991-01-XX-01-CN MOD: 284318-01?
CN and MOD: 284318-01 remain part of the exact Bently Nevada 991-01-XX-01-CN MOD: 284318-01 identity. Keep both in the order and configuration record so the regional execution is not confused with a standard 991 option.
How can a customer check whether Bently Nevada 991-01-XX-01-CN MOD: 284318-01 is sending a valid loop signal?
Measure the two-wire 4–20 mA loop and compare it with the non-isolated PROX OUT and COM diagnostic path on Bently Nevada 991-01-XX-01-CN MOD: 284318-01. This separates a field-loop problem from a probe or gap problem.
Why might Bently Nevada 991-01-XX-01-CN MOD: 284318-01 report Not OK during startup?
Bently Nevada 991-01-XX-01-CN MOD: 284318-01 uses power-up inhibit and Not OK/signal defeat functions. Check supply polarity, the matched NSv probe path and the configured XX system length before treating the startup indication as thrust.
What mounting detail matters for Bently Nevada 991-01-XX-01-CN MOD: 284318-01?
The 01 field on Bently Nevada 991-01-XX-01-CN MOD: 284318-01 selects 35 mm DIN-rail clips. Confirm the transmitter is seated on the rail and that the loop and PROX OUT wiring are not being used to support the enclosure.
Why should the complete Bently Nevada 991-01-XX-01-CN MOD: 284318-01 be kept on the quotation?
The complete Bently Nevada 991-01-XX-01-CN MOD: 284318-01 record carries the 0–1 mil range, customer-defined XX length, DIN mounting, CN execution and MOD identity. A shortened 991 label is not enough to reproduce that combination.
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Regional MOD Record
Moore Automation
Moore Automation supports industrial automation, monitoring and instrumentation enquiries with complete model records and coordinated supply information.
The requested 991-01-XX-01-CN MOD: 284318-01 record can stay linked to quantities, drawings and shipment details during the enquiry.
The complete 991-01-XX-01-CN MOD: 284318-01 string stays visible in the enquiry.
Moore Automation handles automation, monitoring and instrumentation records.
Quantities, drawings and shipment details remain tied to the model record.
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