PR9350/12 Module | EPRO Shaft Vibration Signal Converter

Product Description

Overview

The EPRO PR9350/12 is a proximity probe driver (oscillator/demodulator) from Emerson’s AMS / EPRO PR9350 series. It interfaces with eddy current displacement sensors such as the PR6422 and PR6423 series, converting raw probe signals into standardized voltage outputs that represent shaft vibration, axial position, and eccentricity.

This driver is widely used in turbomachinery monitoring systems including steam turbines, gas turbines, compressors, pumps, and gearboxes. Moreover, its API 670 compliance ensures reliable operation in critical machinery protection environments. The compact design allows installation in racks or cabinets, integrating seamlessly with Emerson monitoring platforms such as VM600 and AMS 6500.

Technical Specifications

• Product Type: Proximity Probe Driver (Oscillator/Demodulator)

• Model Number: PR9350/12

• Manufacturer: Emerson / EPRO

• Compatible Probes: PR6422, PR6423 (5 mm, 8 mm, etc.)

• Measurement Principle: Eddy current displacement (non-contact)

• Input: Probe signal from PR642x series

• Output Signal: Standardized voltage (–2 V to –18 V DC proportional to gap)

• Scale Factor: 8 V/mm (203.2 mV/mil) ±5%

• Linear Measurement Range: 2 mm (80 mils) typical

• Deviation from Best Fit Line (DSL): ±0.025 mm (±1 mil)

• Power Supply: 24 V DC nominal (18–30 V DC), max. 50 mA

• Frequency Response: Up to 10 kHz

• Operating Temperature Range: –25 °C to +85 °C

• Storage Temperature Range: –40 °C to +100 °C

• Temperature Error: <3%

• Supply Voltage: 5 Vrms

• Carrier Frequency: 3 to 5 kHz

• Capacitance: 250 pF (each winding)

• Protection Class: IP20 (module housing)

• Mounting: DIN rail or rack installation

• Compliance: API 670 compliant, CE marked

• Applications: Shaft vibration, axial position, eccentricity monitoring

FAQ

Q1: Which probes are compatible with PR9350/12?
A1: It supports PR6422 and PR6423 eddy current probes of various diameters.

Q2: What output type does this driver provide?
A2: It provides a standardized voltage signal proportional to the probe gap.

Q3: Can it operate in harsh industrial environments?
A3: Yes, the module is robust and reliable under industrial operating conditions.

Q4: What monitoring systems are compatible with this module?
A4: It integrates with Emerson VM600, AMS 6500, and other EPRO/Emerson platforms.

Q5: Is the PR9350/12 API 670 compliant?
A5: Yes, it meets API 670 standards for turbomachinery protection systems.