Product Short Description
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Product Overview
The VM600 MPC4 is the core mechanical-protection card in Meggitt’s VM600 rack-based system. It simultaneously conditions four dynamic vibration channels and two speed/tachometer channels, providing real-time machinery protection and condition monitoring. -
Technical Specifications
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Dynamic Inputs: 4 fully-programmable channels
– Accept acceleration, velocity, or displacement (proximity) signals
– DC range 0 … +20 V or 0 … –20 V; AC ±10 V max
– Amplitude accuracy ±1 % of full scale -
Speed Inputs: 2 tachometer channels for speed and phase reference
Description
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Signal Processing
– 24-bit DSP engine
– Programmable broadband & narrow-band filters
– Integration/differentiation, RMS, peak, peak-to-peak, rectification
– Order tracking (amplitude & phase) and gap measurement -
Outputs & Interfaces
– Front-panel BNC connectors for raw-signal buffering
– 4–20 mA, RS-485 / Modbus RTU, encoder RS-422/RS-485 (config-dependent) -
Alarms & Limits
– Programmable Alert, Danger, and OK set-points
– Adaptive levels for dynamic thresholding -
Environmental
– Power: 24 VDC nominal
– Operating temperature –20 °C … +70 °C
– Protection IP65 -
Versions
– Standard, separate-circuit, and SIL-certified variants
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Functional Highlights
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Continuous online protection with < 30 ms trip response
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Hot-swap capability for live maintenance
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Integrated 2 mA constant-current supply for ICP accelerometers and proximity probes
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Seven front-panel LEDs for module and alarm status
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Typical Applications
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Steam & gas turbine protection systems
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Centrifugal compressors and pumps
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Gearbox and motor condition monitoring
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Petrochemical and refinery rotating equipment
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Safety-critical SIL 2/3 machinery protection loops
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