Vibro-meter VM600 MPC4 Machinery Protection Card

The Vibro-meter VM600 MPC4 is a multi-channel machinery protection card available in two versions: 200-510-111-034 and 200-510-070-113. These modules serve as the core measurement units within the VM600 mechanical protection system, providing continuous monitoring of vibration, displacement, and speed parameters on critical rotating equipment such as turbines, compressors, and generators.

Channel Configuration

The MPC4 provides four independent dynamic signal input channels for vibration measurement, plus two dedicated speed input channels for rotational speed and phase reference signals. Each dynamic channel can be configured to accept inputs from IEPE accelerometers, velocity sensors, or eddy current proximity probes. The module supports simultaneous measurement of multiple parameters per channel, including overall amplitude, displacement, and velocity values.

• Dynamic Channels: 4 independent inputs

• Speed Channels: 2 tachometer inputs

• Input Types: IEPE accelerometers, velocity sensors, proximity probes

• Measurement Parameters: Vibration amplitude, displacement, velocity, phase, speed

• Alarm Levels: 3 programmable alarm levels per channel (Alert, Danger, OK)

• Frequency Range: Configurable from 0.1 Hz to 10 kHz

• Filter Options: Programmable broadband and narrowband filters

• Analog Outputs: Multiple configurable outputs via IOC4T interface

Signal Processing Features

The module incorporates advanced digital signal processing capabilities including integration and differentiation for converting acceleration to velocity and displacement measurements. Programmable filters allow optimization of measurement bandwidths for specific machinery types and operating conditions. The MPC4 supports simultaneous amplitude and phase monitoring, providing comprehensive diagnostic data for rotor dynamics and balancing analysis.

Integration and Diagnostics

Both versions integrate seamlessly with VM600 racks via the backplane bus, communicating with IOC4T I/O modules for alarm relay outputs and analog signal retransmission. Configuration is performed through VM600 MPS software, allowing engineers to set measurement parameters, alarm thresholds, and filter characteristics. Front panel BNC connectors provide access to buffered raw sensor signals for external analysis. Continuous self-diagnostics monitor sensor integrity and internal module health.