MEGGITTVM600Mk2 MPC4Mk2 + IOC4Mk2 machinery protection and condition monitoring module

operation of XMx16 + XIO16T modules for 

condition monitoring and/or combustion 

monitoring, including the processing and 

presentation of measurement data for analysis. 

VibroSight is also used to configure and manage 

CPUMMk2 + IOCNMk2 modules.

Refer to the VibroSight® machinery monitoring 

system software data sheet for further information.

VibroSight® / VM600Mk2 MPC4Mk2

condition monitoring licensing

In VibroSight® / VM600Mk2 MPC4Mk2 systems, the 

MPC4Mk2 + IOC4Mk2 module can provide 

machinery protection system (MPS) functionality 

and/or condition monitoring system (CMS) 

functionality, depending on the requirements of 

the application.

For the VM600Mk2 MPC4Mk2 + IOC4Mk2 machinery 

protection and condition monitoring module, 

machinery protection functionality is available by 

default for all versions of the module, while 

condition monitoring functionality is optional. 

Accordingly, MPC4Mk2 condition monitoring can 

be used by either (1) ordering a version of the 

module with condition monitoring enabled or (2) 

ordering and uploading a condition monitoring 

license to a version of the module without 

condition monitoring enabled (using 

VibroSight System Manager).

Note: MPC4Mk2 condition monitoring also requires 

a VibroSight® software edition / license that 

supports condition monitoring.

For example, a VibroSight / VM600Mk2 MPC4Mk2 

system consisting of MPC4Mk2 + IOC4Mk2 modules 

can initially be installed and used as a MPS only. 

Then, CMS functionality can be quickly and easily 

added at any time by upgrading the licenses for 

the MPC4Mk2 + IOC4Mk2 module(s) and for 

VibroSight software, as required.

Applications information

As part of a VibroSight® / VM600Mk2 system, 

MPC4Mk2 + IOC4Mk2 machinery protection and 

condition monitoring modules are ideal for the 

protection and/or condition monitoring of critical 

assets such as gas, steam or hydro turbines and 

other high-value rotating machines in a wide 

range of industrial applications.

For further information, contact your local 

Meggitt representative.

Supported sensors

Currently available : Compatible with a wide range of sensors and measurement chains 

with current (2-wire) or voltage (3-wire) outputs, including the 

following sensors from the Meggitt vibro-meter® product line:

• CAxxx vibration sensors (piezoelectric accelerometers)

• CExxx and PVxxx vibration sensors (piezoelectric accelerometers

and velocity sensors)

• CVxxx and VExxx vibration sensors (velocity sensors)

• CPxxx dynamic pressure sensors (piezoelectric pressure sensors)

• TQxxx proximity sensors

• LSxxx air-gap sensors.

Dynamic inputs

Number of channels : 4 (independent channels)

Voltage inputs

• DC measurement range : 0 to +20 VDC or 0 to −20 VDC.

Note: 10 Hz DC filter (see DC filtering on page 5).

• AC measurement range : ±20 VPEAK-PEAK

• AC + DC measurement range : ±24 VPEAK-PEAK

Common-mode voltage range : −50 to +50 VDC

Common-mode rejection ratio (CMRR) : >55 dB, up to 60 Hz.

>60 dB, from 45 to 65 Hz.

Current inputs

• DC measurement range : 0 to 35 mA

• AC measurement range : ±30 mAPEAK-PEAK

• AC + DC measurement range : ±50 mAPEAK-PEAK

Frequency bandwidth : DC to 20 kHz

Input impedance

• Voltage : ≥100 kΩ, between the differential (high and low) inputs

• Current : 200 Ω ±0.2%

Accuracy

• Amplitude : ±1% of full scale

• Phase : ±1° from 10 Hz to 2 kHz.

±15° from 2 to 20 kHz.

Dynamic input range : ≥80 dB, from 3 Hz to 20 kHz

DC filtering

DC filter

• Cutoff frequency (−3 dB) : 10 Hz ±3.5 Hz

• Roll-off : −40 dB/decade (second order)

Note: The DC filter is used to extract the DC part of a dynamic input when it is configured as a DC input.

High-pass filtering

High-pass filter

• Cutoff frequency (−3 dB) : 0.1, 1 or 3 Hz (or bypassed)

• Roll-off : −20 dB/decade (first order)

• Phase error : <1° at 100 times the cutoff frequency (10, 100 or 300 Hz)

Note: The high-pass filter is used to configure a dynamic input for an AC only input signal with one of 3 different 

cutoff frequencies. This filter can be disabled in order to allow the DC-coupling of the input signal (AC + DC).

Auxiliary inputs

Number of channels : 2 (independent channels)

configurable as either tachometer inputs or DC inputs

Common-mode voltage range : −50 to +50 VDC

Common-mode rejection ratio (CMRR) : >50 dB, up to 60 Hz.

>55 dB, from 45 to 65 Hz.

Tachometer input

• Triggering method : Crossing of threshold on rising edge or falling edge of signal

• Triggering threshold : 2/3 of peak-peak value ±10% for rising edge.

1/3 of peak-peak value ±10% for falling edge.

• Tachometer pulse acquisition/

detection (on input)

: Up to 51.2 kHz.

• Speed / frequency measurement 

range

: 1 to 100000 RPM / 0.01667 to 1666.67 Hz.

Note: Configurable tacho divider of 1 to 255 (pulses per revolution).

• Voltage range : 0.6 to 50 VPEAK-PEAK from 2 Hz to 10 kHz.

2 to 50 VPEAK-PEAK from 10 kHz to 50 kHz.

Auxiliary input

• Current range input : ±50 mAPEAK-PEAK (AC + DC measurement range)

• Voltage range input : ±50 VPEAK-PEAK

DC input

• Voltage measurement range : 0 to +20 VDC or 0 to −20 VDC.