Description

EPRO MMS3125/022‑020 Dual‑Channel Vibration Monitoring Module

Technical Specifications

• Product Model: MMS3125/022‑020
• Brand: EPRO (Baker Hughes, Germany)
• Warranty: One Year
• Input Voltage: 24 VDC (18‑31.2 VDC), powered by MMS3000 rack backplane; max 6 W power consumption
• Operating Temperature: 0 °C ~ +65 °C rack‑mount
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: Signal bandwidth 5 Hz‑6 kHz (-3dB filter)
• Protection Class: IP20, cabinet‑only indoor installation
• Accuracy Class: Vibration measurement ±1.5 % full‑scale
• Output Frequency: Supports rotating‑machine fundamental frequency 10‑15000 RPM
• Rated Current: Max 250 mA typical module draw; relay contacts 5 A @250 VAC
• Channel Configuration: 2 independent channels for piezoelectric vibration sensors (PR9264 series)
• Signal Outputs: Buffered sensor signal output; 4‑20 mA analog proportional output; alarm / danger relay contacts
• Diagnostics: Sensor open‑circuit / short‑circuit fault detection; front‑panel LED status indicators
• Galvanic Isolation: Field‑sensor side vs rack backplane 1000 VAC isolation rating
• Mounting: Standard MMS3000‑series rack slot form‑factor
• Dimensions / Weight: 220 mm × 160 mm × 30 mm; approx 0.80 kg
• 

Product Overview

The MMS3125/022‑020 is dual‑channel vibration monitoring module for EPRO MMS3000 machinery protection platform. It supplies signal conditioning for piezoelectric vibration sensors, measuring bearing absolute vibration for rotating assets such as turbines, compressors and centrifugal pumps. It converts raw vibration charge signals into usable analog values, provides buffered monitor outputs, and executes channel‑level self‑diagnostics to detect broken cables and sensor failures. Two‑level alarm relay outputs support machinery warning and trip logic within power‑plant, oil‑gas and petrochemical heavy‑EMI cabinet environments. Dual‑channel design enables simultaneous monitoring of two independent vibration measurement points within single rack‑mount module.

This machinery‑protection module addresses rotating‑equipment condition‑monitoring challenges: piezoelectric‑sensor dedicated signal conditioning, built‑in sensor‑fault diagnostics, robust galvanic isolation, drop‑in spare‑part compatibility for legacy MMS3000‑series retrofit‑maintenance projects. Machinery‑monitoring engineers, power‑plant and refinery maintenance technicians and retrofit integrators benefit most. Typical applications: gas‑turbine, steam‑turbine and centrifugal‑compressor bearing‑vibration protection cabinets.