Meggitt MPC4 mechanical protection card

Meggitt MPC4 mechanical protection card

Core functions and features

Multi channel signal processing

Supports 4 dynamic signal inputs (capable of measuring acceleration, velocity, displacement, etc.) and 2 speed (speedometer) inputs (compatible with proximity probes, magnetic pulse sensors, TTL signals, and supports fractional speed ratio), all channels can be individually programmed.

Dynamic signals can achieve digital filtering (high pass/low-pass/band-pass), integration/differentiation, rectification (RMS, average, true peak, etc.), order tracking (amplitude+phase, only supported by standard and independent circuit versions), and sensor target gap measurement.

Flexible monitoring and alarm

Programmable settings for Alert, Danger, and OK thresholds, supporting alarm delay, lag, and locking functions, and the alert/danger level can be adaptively adjusted based on speed or external information.

Rich alarm logic: supports switching between over level (A+, D+) and under level (A -, D -) (accelerometer system only over level), can combine AND/OR/majority voting logic, provides 8 basic functions and 4 advanced functions, and has a maximum alarm scanning interval of 100ms.

Built in 'OK System': Real time monitoring of sensor signals, diagnosis of wire breakage, sensor faults, or conditioner issues, with 6 channel LEDs and 1 hardware/processing error LED displaying status.

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Convenient signal access and power supply

The front panel is equipped with BNC interface, which can directly analyze the original signal; The rear of the rack (front end of IOC4T card) provides analog outputs of 0-10V voltage signal and 4-20mA current signal.

Integrated sensor power supply: Supports Vibro Meter front-end devices such as ICP accelerometers and proximity systems, providing multiple power sources such as+27.2V, -27.2V,+15.0V (0-25mA), and 6.16mA (1-23V), and the+5V line has 11.0A overcurrent protection.

Reliability design

Automatically perform self check and diagnostic programs upon power on, supporting hot swapping (inserting/removing cards while live).

Compliant with the "isolation" requirements of the Mechanical Protection System (MPS) and Condition Monitoring System (CMS) in API 670 standard: MPS and CMS do not share a communication bus, and are respectively connected through VM600 MPSx software (MPC4/IOC4T) and VibroSight ®  Software (XMx16/XIO16T) configuration to avoid CMS operation affecting MPS functionality.

Version differences and compliance

MPC4 offers three versions, with core differences reflected in functional scope, interface support, and security compliance. The specific comparison is as follows:

Comparison Dimension Standard Edition Separate Circuits Safety Edition SIL

Core Compliance  IEC 61508、ISO 13849 IEC 61508、ISO 13849、CEI/IEC 60255-5 IEC 61508、ISO 13849

Applicable scenarios include VM600 racks with MPC4/IOC4T and RLC16 relay cards that require independent circuit design. Industrial scenarios include complex racks with CMS cards (such as CMC16 and XMx16) and relay cards (such as IRC4)

VME interface support (D16/A24 slave mode) not supported

Order tracking support (narrowband tracking) not supported

Speed/phase reference support input/output support input/output support not supported

Configuration method RS-232 or VME RS-232 or VME only RS-232

Isolation requirements include no isolation from other components in the rack to prevent configuration errors

Key technical specifications

1. Dynamic signal input

DC range: 0 to ± 20V; AC range: ± 10V (maximum)

Common mode voltage: -50 to+50V, common mode rejection ratio (CMRR)>60dB (50Hz), crosstalk -72dB

Input impedance: 200k Ω; current input range: DC 0-25mA, AC ± 8mA (maximum)

Frequency bandwidth: 0.1Hz-10kHz without integration, 2.5Hz-10kHz with integration; Transmitting bandwidth DC-60kHz (-3dB) to other cards

2. Signal processing accuracy

Broadband filtering: Ripple ± 0.3dB, slope 6-60dB/octave (software adjustable), out of band attenuation>50dB, amplitude accuracy ± 1% of full scale, linear error<± 1%

Narrowband tracking (standard/independent circuit version only): Q-value=28, frequency range 0.15Hz-10kHz, phase error<± 6 ° (maximum),<± 1 ° (typical value of 1X order), amplitude accuracy ± 1.2%

Axis relative vibration: frequency 0.1Hz-10kHz (vibration), DC-1Hz (gap/position), amplitude accuracy ± 1.2% (vibration), ± 1% (gap)

3. Power supply and power consumption

Card power supply: 5VDC ± 5%, ± 12VDC; 5VDC power consumption 12.5W (additional+1W for each sensor used), ± 12VDC maximum power consumption 2.5W

Sensor power supply: voltage type (± 27.2V,+15V, ± 5% error, 0-25mA), current type (6.16mA ± 5%, 1-23V)

4. Environmental and physical parameters

Working temperature: -25 to+65 ℃ (-13 to+149 ℉), humidity 0-90% (non condensing)

Storage temperature: -40 to+85 ℃ (-40 to+185 ℉), humidity 0-95% (non condensing)

Dimensions: Height 6U (262mm), Width 20mm, Depth 187mm; Weight 0.40kg (0.88lb)

Order Information

Ordering model: Please specify the version, firmware version (SSS), and hardware version (Hh). The specific model is as follows:

Standard version: 200-510-SSS-1Hh

Independent circuit board: 200-510-SSS-2Hh

SIL Safety Edition: 200-510-SSS-3Hh