1701/15 Bently Nevada Field Monitor Proximitor Input Monitor

Configured for radial vibration and thrust position monitoring, the Bently Nevada 1701/15 (1701/15 Proximitor Input Monitor) provides two-channel signal monitoring for proximity probe inputs. The module operates from a 24 VDC field monitor power system and measures probe gap voltage and setpoint conditions.

Hardware Specifications

Eddy-Current Probe Gap and Rotor Monitoring

The 1701/15 processes Proximitor-related gap voltage for two monitoring channels. Therefore, technicians can evaluate proximity probe operating conditions associated with radial vibration and thrust position measurements.

The specified gap measurement range extends from -1 V to -23 V, with 1 mV gap resolution and +/- 20 mV gap accuracy. During commissioning, technicians can validate the probe gap voltage against the installed probe target and system scaling. A nominal -10 VDC gap target can serve as a common installation reference when the associated Bently Nevada probe system specifies that condition.

The buffered output supports up to 30 m (100 ft) of cable at 60 pF/ft. Because the supplied specification identifies this output as non-isolated, installers should maintain appropriate signal routing and shielding practices to reduce electrical interference and cross-talk.

Frequently Asked Questions

Q: How many proximity monitoring channels does the 1701/15 provide?
A: The 1701/15 provides two channels for Proximitor input monitoring.

Q: What gap voltage range does the module specify?
A: The specified gap range is -1 V to -23 V, with 1 mV resolution and +/- 20 mV accuracy.

Q: Is the buffered output electrically isolated?
A: No. The specified buffered output is non-isolated and supports a 30 m (100 ft) cable at 60 pF/ft.

Field Installation Guidelines

1. Install the module within the specified 1701 power system and provide the specified -24 VDC and +5 VDC supply inputs.
2. Verify proximity probe wiring before energizing the monitoring circuit. Check polarity, termination, and cable continuity against the installation drawing.
3. Keep probe signal cables separated from high-current power conductors, switching circuits, and other strong electromagnetic noise sources.
4. Use appropriate cable shielding practices. Connect shields according to the plant instrumentation grounding scheme and avoid unintended ground loops.
5. Verify the probe gap voltage after installation. Confirm that the measured value falls within the applicable probe operating range and matches the configured monitoring scale.
6. Because the buffered output is non-isolated, check the receiving equipment grounding and input reference before connecting external monitoring equipment.
7. Confirm operating temperature and humidity remain within the specified limits during continuous operation.