Epro MMA3120/022-000 Bearing Vibration Monitor Module

Product Overview

The MMA3120/022-000 is a compact bearing vibration monitoring unit developed by Epro (Emerson MMS 3000 platform) for measuring absolute vibration levels in rotating machinery. It is optimized for single or low-channel monitoring architectures where reliable bearing condition assessment is required.

The module works with seismic vibration sensors and is typically used in turbines, compressors, pumps, and fan systems to detect mechanical degradation and support protective shutdown functions.

Measurement Principle

The system processes signals from seismic accelerometers, converting mechanical vibration into electrical signals for evaluation. It supports configurable filtering and alarm thresholds, enabling adaptation to different machine dynamics and operating speeds.

Unlike shaft-relative systems, this unit focuses on absolute bearing housing vibration, making it suitable for general-purpose machine health monitoring.

Technical Specifications

Model: MMA3120/022-000
Manufacturer: Epro (Emerson MMS 3000 Series)
Product Type: Bearing Vibration Monitoring Module

Sensor Compatibility:

• PR9268 seismic velocity sensors

Measurement Type: Absolute bearing vibration

Frequency Response:

• High-pass filter options: 5 Hz / 10 Hz / 15 Hz

• Low-pass filter range: 50 Hz to 1500 Hz

Output Signals:

• 4–20 mA analog current output

• Configurable alarm and status outputs

Configuration Interface: Software-based parameter setup for measurement scaling, alarm thresholds, and output logic

Electrical Interface: Harting industrial connector system

Mechanical Data:

• Compact module design for space-limited installations

• Shock resistance: up to 20 g

Power Supply: 24 V DC

Installation Type: Cabinet or machine-mounted configuration

Environmental Capability: Designed for industrial environments with vibration, temperature variation, and electrical noise

Compliance: Designed for API 670 aligned monitoring applications

System Characteristics

• Absolute vibration measurement focused on bearing housing condition

• Configurable signal filtering for different machine types

• Software-driven configuration for flexible deployment

• Stable analog output for direct integration into control systems

• Compact architecture suitable for low-channel monitoring setups

• High mechanical robustness for demanding industrial environments

Application Areas

• Small and medium gas or steam turbines

• Hydro turbine units

• Centrifugal and process compressors

• Industrial pump systems

• Cooling and ventilation fans

• Basic predictive maintenance and alarm systems

FAQ

What type of vibration does this module measure?
It measures absolute bearing vibration using seismic velocity sensors.

Is it suitable for shaft vibration monitoring?
No, it is designed for bearing housing vibration rather than shaft-relative measurement.

Can parameters be adjusted after installation?
Yes, all measurement ranges, filters, and alarm settings are configurable via software.

What sensors are compatible?
It is designed specifically for PR9268 seismic sensor series.

Is it suitable for large multi-channel systems?
It is intended for small or low-channel applications, not large-scale monitoring architectures.