Description
1. Product Title
EPRO (Emerson) MMS 6140‑ Dual‑Channel Absolute Shaft Vibration Monitor, MMS6000 Series
2. Product Overview
MMS 6140 is a hot‑swap dual‑channel monitoring module belonging to EPRO MMS6000 turbo‑machinery protection system.
Channel 1 accepts eddy‑current probe for relative shaft vibration; Channel 2 connects seismic / piezoelectric velocity sensor for bearing housing absolute vibration.
The module compensates phase difference between two sensors and calculates absolute shaft vibration by signal subtraction. Two channels can also work independently. It provides configurable alarm / trip thresholds, 4‑20 mA analog output, sensor fault detection, RS232 local configuration and RS485 host‑system communication interface.
Lifecycle status: Obsolete / EOL, only for spare‑part replacement for existing steam‑turbine, gas‑turbine and compressor protection systems.
3. Technical Specifications
- Brand: EPRO (Emerson / ABB)
- Model: MMS 6140
- Warranty: One Year
- Condition: New / Refurbished Original Spare
- Channels: 2 independent measuring channels
- Sensor Input:
- Ch1: Eddy‑current proximity sensor (relative shaft vibration), freq 1‑250 Hz
- Ch2: Seismic / piezoelectric sensor (bearing absolute vibration), freq 5‑2000 Hz
- Calculation function: Absolute shaft vibration (relative minus housing vibration, built‑in phase compensation)
- Output: 4‑20 mA analog measured‑value output; relay alarm & trip outputs
- Communication: RS232 for local setup; RS485 for connecting MMS6800 diagnostic system / DCS host
- Diagnostics: Sensor break / short‑circuit detection, module self‑diagnosis
- Feature: Hot‑swappable, run‑up/coast‑down range multiplier for alarm threshold adjustment
- Power: 24 VDC
- Form factor: 1‑slot Eurocard for MMS6000 rack
- Weight: Approx 320 g
- Remark: End‑of‑life module, spare‑part‑only; successor is A6140 within AMS6500 platform
- Certification: CE
5. Application Scenarios
- Thermal‑power plant turbine cabinet: Monitor absolute shaft vibration of steam turbine shafts for machinery protection interlock.
- Petrochemical compressor unit: Protect large centrifugal compressors, distinguish shaft vibration from casing‑structure vibration.
- Energy‑industry rotating‑machinery: Gas turbines, hydro‑turbines, large blowers, centrifuge equipment condition monitoring & safety trip protection.
Related MMS6000 reference:
- MMS 6140: Absolute shaft vibration monitor (eddy + seismic sensor)
- Successor replacement: A6140 (AMS6500 series)
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