MPC4 machinery protection card

200-510-SSS-1Hh

FEATURES
» From the Vibro-Meter® product line
» Continuously online machinery protection card
» Real-time measurement and monitoring using state-of-the-art DSP techniques
» 4 dynamic signal inputs and 2 tachometer (speed) inputs, all individually programmable
» Programmable broad-band and narrow-band filters
» Simultaneous amplitude and phase monitoring in order tracking mode
» Programmable Alert, Danger and OK set points
» Adaptive Alert and Danger levels
» Front panel BNC connectors for easy analysis of raw signals
» 7 front panel LEDs show status and alarms
» Integrated power supply for many Vibro-Meter front-ends, including ICP accelerometers and proximity systems
» Live insertion and removal of cards
» Available in ‘standard’, ‘separate circuits’ and ‘safety’ (SIL) versions

Ordering number:

200-510-SSS-2Hh

DESCRIPTION
MPC4 card
The MPC4 machinery protection card is the central element in the VM600 series machinery protection system (MPS), from Meggitt Sensing Systems’ Vibro-Meter® product line. This very versatile card is capable of measuring and monitoring up to four dynamic signal inputs and up to two speed inputs simultaneously.
The dynamic signal inputs are fully programmable and can accept signals representing acceleration, velocity and displacement (proximity), among others. On-board multi-channel processing allows measurement of various physical parameters, including relative and absolute vibration, Smax, eccentricity, thrust position, absolute and differential housing expansion, displacement and dynamic
pressure.
Digital processing includes digital filtering, integration or differentiation (if required), rectification (RMS, mean value, true peak or true peak-to-peak), order tracking (amplitude and phase) and measurement of the transducer-target gap.
The speed (tachometer) inputs accept signals from a variety of speed sensors, including systems based on proximity probes, magnetic pulse pick-up sensors or providing TTL signals. Fractional tacho ratios are also supported.
The calibration may be expressed in metric or imperial units. Alert and Danger set points are fully programmable, as are alarm time delay, hysteresis and latching. The Alert and Danger levels can be adapted as a function of the speed or any external information.
A digital output is available internally (on the corresponding IOC4T card) for each alarm level.
These alarm signals may be routed on a bus within the VM600 rack to drive relays on optional relay cards (such as the IRC4 and RLC16). The processed dynamic (vibration) signals and speed signals are available at the rear of the rack (on the front panel of the IOC4T) as analog output signals. Voltage-based (0 to 10 V) and current-based
(4 to 20 mA) signals are provided.
The MPC4 performs a self-test and diagnostic routine on power-up. In addition, the card’s built-in “OK System” continuously monitors the level of signals provided by the sensors and indicates any problem due to a broken transmission line, faulty transducer or conditioner.
An LED indicator on the MPC4 front panel indicates whether a processing or hardware error has occurred. Six additional LEDs (one per input channel) indicate whether the OK System has detected a fault and whether an alarm has occurred on the channel. The MPC4 card is available in three versions: a ‘standard’ version, a ‘separate circuits’ version and a ‘safety’ (SIL) version, all of which function as a card pair using an IOC4T input/output card
‘Standard’ and ‘safety’ (SIL) versions of the MPC4 Both the ‘standard’ version and the ‘safety’ (SIL) version of the MPC4 card are certified to IEC 61508 and ISO 13849.
The ‘standard’ MPC4 card is the original version, intended for safety systems using a VM600 rack with a limited range of cards, that is, ‘standard’ MPC4 / IOC4T card pairs and RLC16 relay cards. It has a VME-compatible slave interface and is fully software configurable via RS-232 (on the front panel of the card) or VME.
The ‘safety’ MPC4 card, also known as the MPC4 SIL, was developed to permit a wider range of installation options. Specifically, VM600 racks that also contain condition monitoring cards (such as the CMC16 and XMx16) and relay cards (such as the IRC4 and RLC16). To safety certify these configurations, it was necessary to ensure that the
‘safety’ MPC4 is isolated from the other cards in a VM600 rack, so that there is no possibility of its configuration being inadvertently modified.
Therefore, the ‘safety’ (SIL) version of the MPC4 does not include a VME-compatible slave interface, nor does it provide all of the signal processing capabilities of the ‘standard’ MPC4 card (see Specifications – ‘standard’ and ‘separate circuits’ MPC4 cards only on
page 6). Segregation of MPS and CMS
The VM600 rack, machinery protection cards, condition monitoring cards and associated software are designed for compliance with the machinery protection system (MPS) and condition monitoring system (CMS) “segregation” requirements of the API 670 standard, which ensures that the functionality of the MPS does not depend on and is not compromised in any way by the operation of the CMS.

200-510-SSS-3Hh

So although machinery protection cards and condition monitoring cards can easily share sensor signals from measurement chains, MPC4/IOC4T card pairs do not share any communication buses with XMx16/XIO16T condition monitoring card pairs in a VM600 rack, and MPC4/IOC4T card pairs are configured and operated using the VM600 MPSx software (while XMx16/ XIO16T card pairs are configured and operated using the VibroSight® software).

Applications information The MPC4 cards are highly suitable for machinery protection in a wide range of industrial applications. For further information on the use of MPC4 cards, refer to the VM600 Functional Safety Manual MAVM600-FS/E. For specific applications, contact your nearest Meggitt Sensing Systems representative.

SPECIFICATIONS – ALL MPC4 CARDS
Dynamic signal inputs
Number of inputs : 4 per MPC4 card
DC range : 0 to +20 V or 0 to −20 V
AC range : ±10 V (maximum)
Common mode voltage range : −50 to +50 V
CMRR : >60 dB at 50 Hz
Crosstalk : −72 dB
Input impedance : 200 kΩ
Current input range
• DC signals : 0 to 25 mA
• AC signals : ±8 mA (maximum)
Analog AC frequency band (without integration) : 0.1 Hz to 10 kHz
Analog AC frequency band (with integration) : 2.5 Hz to 10 kHz
Analog frequency band for throughput to other cards and buffered AC outputs : DC to 60 kHz (−3 dB)
Current measuring resistor : 324.5 Ω
Processing options
Broad-band
Filtering options : High-pass, low-pass or band-pass
LP/HP ratio in pass band : 500 (maximum)
Ripple : ±0.3 dB
Slope : 6 to 60 dB/octave (software configurable)
Attenuation outside pass band : >50 dB
Amplitude accuracy : ±1% of full-scale
Linearity error : <±1%
Equivalent input noise (without integration) : <200 µV RMS

Narrow-band (tracking)
The ‘standard’ and ‘separate circuits’ versions of the MPC4 card support narrow-band tracking (see Specifications –
‘standard’ and ‘separate circuits’ MPC4 cards only on page 6).
The ‘safety’ MPC4 card does not support narrow-band tracking.
Relative shaft vibration
Frequency band
• Vibration : 0.1 Hz to 10 kHz
• Gap/position : DC to 1 Hz
Amplitude accuracy
• Vibration : ±1.2% of full-scale
• Gap/position : ±1% of full-scale
• Linearity error : <±1%
Initial gap/offset compensation : Available
Buffered (raw) dynamic signal outputs
These signals are available on the MPC4 card’s BNC outputs and the IOC4T card’s raw outputs.
Frequency range : DC to 10 kHz (−0.1 dB or 1%).
DC to 60 kHz (−3 dB).
Admissible load on output : >50 kΩ
Amplitude error : <2%
Phase error : <5° (DC to 10 kHz)
Transfer ratio
• Voltage input : 1 V/V
• Current input : 0.3245 V/mA

Thông tin chi tiết: Catalog

200-510-071-113