EPRO MMS3311/022-000 Vibration Monitoring Transmitter

Overview

The MMS3311/022-000 vibration monitoring transmitter is a precision measurement module from the EPRO MMS3000 protection and condition monitoring platform. It is engineered for continuous supervision of rotating machinery, delivering accurate non-contact measurements of shaft vibration, displacement, and relative position using eddy current probe technology.

Designed for direct installation at the machine, this transmitter integrates signal conditioning, monitoring logic, and output generation within a compact industrial enclosure. Compliance with API 670 ensures suitability for safety-critical turbomachinery applications.

Functional Characteristics

The MMS3311/022-000 operates as a single-channel transmitter, converting raw probe signals into standardized current outputs for integration with protection systems, PLCs, or DCS platforms. Internal microprocessor-based supervision continuously checks sensor integrity, electronics health, and power availability, significantly reducing the risk of undetected faults.

Redundant 24 V DC power inputs enhance availability in demanding operating environments where uninterrupted monitoring is required.

Technical Specifications

• Monitoring Channel
  Single vibration or displacement measurement channel

• Sensor Compatibility
  Eddy current probes from PR6422, PR6423, PR6424, PR6425, and PR6426 series

• Measurement Type
  Shaft vibration, relative displacement, or position (depending on configuration)

• Frequency Bandwidth
  Dynamic response up to approximately 20 kHz

• Analog Output
  Selectable 0–20 mA or 4–20 mA current output

• Status and Alarm Outputs
  Configurable switching outputs for alarm and system status signaling

• Power Supply
  Dual redundant 24 V DC inputs

• Self-Supervision
  Continuous monitoring of probe circuit, signal quality, and internal electronics

• Compliance
  Designed in accordance with API 670 requirements

• Installation Method
  Direct machine-mounted installation

• Housing
  Heavy-duty industrial enclosure suitable for harsh environments

• Operating Temperature Range
  -30 °C to +85 °C

• Dimensions
  127.5 × 125.75 × 80 mm

• Weight
  1.3 kg

Applications

This transmitter is commonly deployed in rotating equipment protection and diagnostics, including:

• Steam and gas turbines

• Centrifugal and axial compressors

• Large industrial pumps

• Gearboxes and driven shafts

• Balance-of-plant rotating machinery

Its compact design and high environmental tolerance make it especially suitable for installations with limited cabinet space or high vibration exposure.

MMS3311 Variant Notes

The 022-000 configuration within the MMS3311 family represents a predefined hardware and output setup aligned with specific monitoring and installation requirements. Exact functionality may vary depending on probe type, output scaling, and alarm configuration selected during commissioning.

FAQ

Q: Can the MMS3311/022-000 be used as part of a machinery protection system?
A: Yes. It is designed to integrate with machinery protection and monitoring architectures and meets API 670 guidelines when applied correctly.

Q: Does the module require external signal conditioners?
A: No. Signal conditioning and conversion electronics are fully integrated within the transmitter.

Q: Is cabinet installation mandatory?
A: No. The unit is designed for direct mounting at the machine, reducing wiring distance and signal interference.