EPRO MMS6370 Phase Monitoring Module

EPRO MMS6370 Phase Monitoring Module
I. Basic Information
Brand: EPRO (formerly Philips Mechanical Protection, now affiliated with Baker Hughes / Emerson)
Series: MMS6000 Rotating Machinery Monitoring and Protection System
Full Model Name: MMS6370 / MMS6370-D, External Alias: A6370D
Position: Dual-channel speed + phase measurement module, compatible with eddy current, magnetic-electric, and photoelectric speed measurement probes, used for turbine, compressor overspeed protection, phase analysis, vibration spectrum acquisition
Matching Rack: MMS6000 standard 19-inch chassis, backplane PRoNet bus, paired with A6910 communication main module for external output Modbus

 Core Hardware Parameters
1. Signal Input Channels (2 Independent Speed Measurement Channels)
Compatible Sensors
Eddy Current Probe PR642x (Preamplifier Output – 1~-22V)
Magnetic-Electric Speed Probe PR926x (±5~15V AC Pulse)
Photoelectric / Hall Pulse Sensor
Input Characteristics
Input Impedance > 100kΩ
Pulse Frequency Measurement Range: 0～50kHz, covers high and low-speed units
24-bit High-Precision ADC, single channel maximum 10kHz sampling rate
Built-in Sensor Break Detection (BIST, automatically detects every 100ms)
Phase Function: Extract 1P / Multiple P Phase Pulses, used for vibration phase, spectrum, axis trajectory analysis
2. Electrical Specifications
Backplane Power Supply: Internal 24VDC of the chassis
Single-slot Standard Module, MMS6000 unified size
Operating Temperature: -10℃ ~ +60℃; Storage – 20~+70℃
Protection: Inside the chassis IP20, industrial cabinet installation
Safety Level: Supports SIL3, meets API670 Rotating Machinery Protection Standard
3. Signal Output
Analog Output (4～20mA / 0～10V): Real-time Speed Value, directly connected to DCS/PLC
Relay Alarm Contacts: Warning, Over-speed Hazard Shutdown, two independent switch quantities
PRoNet Backplane Bus: Upload speed, phase, fault, raw spectrum data to A6910
Front Panel SMB Test Port: On-site multimeter / oscilloscope direct measurement of pulse signal

Core Functions
Continuous Speed Monitoring + Overspeed Protection
Two-level Threshold Configuration: Warning (Pre-warning) + Trip (Shutdown), rapid interlock output for overspeed, core security of turbine units; supports threshold shielding in speed-up / speed-down intervals, avoiding false shutdown of the unit during startup.
Phase Acquisition and Fault Diagnosis
Output Phase Reference, combined with MMS6110 (shaft vibration), MMS6210 (axial displacement) for spectrum analysis, axis trajectory, rotor imbalance / misalignment fault diagnosis.
Sensor Online Diagnosis
Automatically identifies probe break, preamplifier failure, pulse loss, and panel fault indicator lights up and uploads system alarms.
Configuration Flexibility
Software settings for gear tooth count, pulse number, filter bandwidth, output range, alarm delay; single module can monitor high and low pressure rotors of the same unit or two independent auxiliary machines separately.
Data Recording
Capture overspeed transient peak, start-stop speed curves, historical events stored in the upper computer of the system.

 Communication Accessories
Internal: PRoNet High-Speed Backplane Bus, networked with MMS6110/MMS6210/A6910 in the same chassis To the outside: Output via the A6910 main module in Modbus RTU/TCP format, connecting to ABB 800xA, Honeywell, and Siemens DCS systems