Vibro-Meter VM600 MPC4 Mechanical Protection Card
Key Features and Benefits
– From the Vibro-Meter® product family
– Continuously on-line machinery protection card
– Real-time measurement and monitoring with state-of-the-art DSP technology
– 4 dynamic signal channels and 2 RPM (speed) channels, all individually programmable
– Programmable broadband and narrowband filters
– Simultaneous monitoring of amplitude and phase in sequential tracking mode
– Programmable alarms, hazards and defined setpoints
– Adaptive alarm and hazard levels
– Front panel BNC connector for easy analysis of buffered “raw” transducer signals
– Front panel LEDs to indicate status and alarms
Key Benefits and Features (continued)
– Integrated power supply for sensors and signal conditioners such as IEPE accelerometers and proximity measurement systems
– Real-time plug-in cards (hot-swappable)
– Available in “standard”, “circuit independent” and “safety” (SIL) versions
Applications
– Mechanical protection and/or basic condition monitoring
Description
MPC4 Card
The MPC4 Machine Protection Card is the centerpiece of the VM600 series of Machine Protection Systems (MPS) from Meggitt’s Vibrometer® product line. The card is extremely versatile, capable of measuring and monitoring up to four dynamic signal inputs and two velocity inputs simultaneously.
The dynamic signal inputs are fully programmable and can accept the following signals
acceleration, velocity and displacement (proximity) signals. On-board multi-channel processing allows measurement of a wide range of physical parameters including relative and absolute vibration, Smax, eccentricity, thrust position, absolute and differential case expansion, displacement and dynamic pressure.
Digital processing includes digital filtering, integration or differentiation (if required), www.ge-drive.com rectification (RMS, average, true peak, or true peak-to-peak), order tracking (amplitude and phase), and measurement of transducer-to-target clearance.
The speed (tachometer) input accepts signals from a variety of speed sensors, including systems based on proximity probes, magnetic pulse pickup sensors, or TTL signals. Fractional tachometer ratios are also supported.
Configurations can be expressed in metric or imperial units. Alarm and hazard setpoints are fully programmable Alarm time delay, hysteresis and latching, hysteresis and latching. Alarm and hazard levels can also be adjusted based on speed or any external information. The alarm and hazard levels can also be adjusted based on speed or any external information.
Each alarm level has an internal digital output (on the appropriate IOC4T I/O card). These alarm signals can drive the four local relays on the IOC4T card, and/or relays on optional relay cards such as the RLC16 or IRC4 via the VM600 rack’s raw bus or open collector (OC) bus.
Processed dynamic (vibration) and velocity signals are available as analog outputs at the rear of the rack (on the front panel of the IOC4T). Voltage signals (0 to 10 V) and current signals (4 to 20 mA) are available.
The MPC4 performs self-tests and diagnostic procedures at power-up. In addition, the card’s built-in “OK system” continuously monitors the signal level provided by the measurement chain (sensors and/or signal conditioners) and indicates any problems caused by broken transmission lines, faulty sensors or signal conditioners.
An LED on the front panel of the MPC4 indicates whether a processing or hardware error has occurred. A further six LEDs, one for each input channel, indicate whether the OK system has detected a fault and whether an alarm has occurred on the channel.
There are three versions of the MPC4 card: the “standard” version, the “circuit independent” version, and the “safe” (SIL) version, all of which use the appropriate IOC4T input /output cards as card pairs.
Different versions of the MPC4 card
There are different versions of the MPC4 card, including “Standard”, “Circuit Independent” and “Secure” (SIL) versions. In addition, some versions have a conformal coating applied to the card’s circuitry to provide additional environmental protection against chemicals, dust, moisture and temperature extremes.
Both the “Standard” version and the “Safety” (SIL) version of the MPC4 card are certified to IEC 61508 and ISO 13849 for use in functional safety environments such as SIL 1 according to IEC 61508 and ISO 13849-1 for PL c.
The “standard” MPC4 card is the original version and supports all functions and processing modes.
The “standard” MPC4 is suitable for safety systems using the VM600 rack. Safety systems. The “standard” MPC4 card is the original version and supports all functions and processing modes. The “Standard” MPC4 card is the original version and supports all functions and processing modes. card pairs and the RLC16 relay card. It has a VME-compatible slave interface so that it can be configured via software via VME when VME is available. It is software configurable via VME when acting as a rack controller in a VM600 rack. It is also software configurable via RS-232 (on the front panel of the card).
The ‘Secure’ (SIL) MPC4 card (MPC4SIL) has been developed to provide a wider range of installation options. Specifically, the VM600 rack also contains condition monitoring cards (e.g. XMx16) and relay cards (e.g. IRC4). In order to certify the security of these configurations, it is necessary to ensure that the MPC4SIL is isolated from the other cards in the VM600 chassis so that its configuration is not inadvertently modified.
As such, the MPC4SIL card does not include a VME-compatible slave interface, does not support tachometer (speed) channels, and does not provide all of the signal processing features of the “standard” MPC4 card (see “Additional Specifications – ‘Standard’ Only” on page 9). “ and “Circuit Independent” MPC4 cards).
Isolation of MPS and CMS
The VM600 rack, Mechanical Protection Card, Condition Monitoring Card and associated software have been designed to comply with the API670 standard for the isolation of the Mechanical Protection System (MPS) and Condition Monitoring System (CMS) to ensure that the functionality of the MPS is not dependent on, or in any way affected by, the operation of the CMS.
Therefore, whilst Mechanical Protection and Condition Monitoring cards can easily share sensor signals from the measurement chain, in a VM600 rack, the MPC4/IOC4T card pair does not share any communication buses with the XMx16/XIO16T Condition Monitoring card pair and the MPC4/IOC4T card pair is configured and operated using the VM600 MPSx software (whereas the XMx16/XIO16T card pair is configured and operated using the VM600 MPSx software (whereas the XMx16/XIO16T card pair is configured and operated using the VM600 MPSx software). XIO16T card pair is configured and operated using VibroSight® software).
Application Information
The MPC4. when used in pairs with the IOC4T I/O cards, is ideally suited for machinery monitoring and protection in a variety of industrial applications.