parkerVM600Mk2 MPC4Mk2 + IOC4Mk2 machinery protection modules

KEY FEATURES AND BENEFITS

• VibroSight® compatible hardware from the 

vibro-meter® product line

• VM600Mk2 (second generation)

machinery protection modules 

• 4 dynamic channels and 2 auxiliary channels 

configurable as either tachometer inputs or 

DC inputs

• VM600Mk2 system safety-line to drive all system 

relays to a safe state

• Diagnostics (built-in self-test (BIST)) provides 

continuous feedback on the health of the 

modules

• Individually configurable inputs (with sensor 

power supply outputs), channel filters, 

processing and outputs – with simultaneous 

data acquisition (fixed frequency or 

order tracked)

• Up to 10 processed outputs per channel

• Multiple alarms per processed output with 

configurable limits, hysteresis and time delay

• AND, OR and majority voting logic functions for 

the combination of alarm and status 

information

KEY BENEFITS AND FEATURES (continued)

• Discrete outputs: 4 user-configurable relays for 

use by alarms and 1 common circuit-fault 

relay

• Analog outputs: 4 outputs configurable as 

either 4 to 20 mA or 0 to 10 V

• Conforms to API 670

• Direct system Ethernet communications

• Compatible with VM600Mk2 system racks 

(ABE04x) and slimline racks (ABE056)

KEY BENEFITS AND FEATURES (continued)

• Live insertion and removal of modules 

(hot-swappable)

• Software configurable

APPLICATIONS

• VM600Mk2 machinery protection

(Q1 2021)

• VM600Mk2 machinery protection and/or 

condition monitoring (Q3 2021)

• Vibration and/or combustion monitoring

• API 670 applications

DESCRIPTION

Introduction

The VM600Mk2 MPC4Mk2 + IOC4Mk2 machinery 

protection modules are designed for operation 

with the second generation of VM600Mk2 rackbased machinery protection system (MPS), from 

Meggitt’s vibro-meter® product line. The 

MPC4Mk2 + IOC4Mk2 are second generation 

modules (cards) that provide 4 dynamic and 2 

auxiliary channels of machinery protection and 

basic condition monitoring in VM600Mk2 systems.

VM600Mk2 rack-based monitoring systems

The vibro-meter® VM600Mk2 rack-based 

monitoring system is the evolution of Meggitt’s 

solution for the protection and monitoring of 

rotating machinery used in the power generation 

and oil & gas industries. VM600Mk2 solutions are 

recommended when a centralised monitoring 

system with a medium to large number of 

measurement points (channels) is required. It is 

typically used for the monitoring and/or 

protection of larger machinery such as gas, 

steam and hydro turbines, and generators, 

smaller machines such as compressors, fans, 

motors, pumps and propellers, as well as balanceof-plant (BOP) equipment.

A VM600Mk2 system consists of a 19" rack, a rack 

power supply and one or more monitoring 

modules. Optionally, relay modules and rack 

controller and communications interface 

modules can also be included.

Two types of rack are available: a VM600Mk2

system rack (ABE04x, 6U) that can house up to 

twelve monitoring modules, and a VM600Mk2

slimline rack (ABE056, 1U) that can house one 

monitoring module. The racks are typically 

mounted in standard 19" rack cabinets or 

enclosures installed in an equipment room.

Different VM600Mk2 monitoring modules are 

available for machinery protection, condition 

monitoring and/or combustion monitoring 

applications. For example, machinery protection 

modules such as the MPC4Mk2 + IOC4Mk2

modules, and condition monitoring modules such 

as the XMV16 + XIO16T monitoring modules for 

vibration and XMC16 + XIO16T monitoring 

modules for combustion.

The RLC16Mk2 relay module is an optional module 

used to provide additional relays when the four 

user-configurable relays per set of 

MPC4Mk2 + IOC4Mk2 modules is not sufficient for 

an application.

The CPUx + IOCx rack controller and 

communications interface modules (CPUM/IOCN 

and CPUMk2 + IOCMk2) are optional modules used 

to provide additional VM600Mk2 system 

functionality such as configuration management, 

“hot-swapping” with automatic reconfiguration 

(to be implemented for VM600Mk2), front-panel 

display, CPUx + IOCx modules redundancy, 

fieldbus data processing, front-panel alarm reset 

(AR) button, MPS rack (CPUx) security, system 

event and measurement event logging, fieldbus 

communications (Modbus, PROFIBUS and/or 

PROFINET) and/or communications redundancy.

Note: Different versions of CPUx + IOCx rack 

controller and communications interface 

modules support different combinations of 

VM600Mk2 system functionality. VM600Mk2 systems 

are compatible with CPUMk2 + IOCMk2 modules.

VM600Mk2 rack-based monitoring systems 

complement the VibroSmart® distributed 

monitoring systems that are also available from 

Meggitt’s vibro-meter® product line, and are 

compatible with the same VibroSight® machinery 

monitoring software suite.

MPC4Mk2 + IOC4Mk2 machinery protection 

modules and VM600 racks

The MPC4Mk2 + IOC4Mk2 machinery protection 

modules monitor and protect rotating machinery 

as part of a VM600Mk2 rack-based monitoring 

system.

The MPC4Mk2 module is always used with an 

associated IOC4Mk2 module as a set of modules. 

Both the MPC4Mk2 and the IOC4Mk2 are singlewidth module that occupy a single VM600Mk2

rack slot (module position). The MPC4Mk2 is 

installed in the front of a VM600Mk2 rack and the 

associated IOC4Mk2 is installed in the rear of the 

rack, in the slot directly behind the MPC4Mk2. 

Each module connects directly to the rack’s 

backplane using two connectors.

Note: The MPC4Mk2 + IOC4Mk2 modules are 

compatible with all VM600Mk2 racks (ABE04x 

system racks and ABE056 slimline racks) and later 

VM600 racks.

System communications

In a VM600Mk2 system (one or more 

MPC4Mk2 + IOC4Mk2 modules and any associated 

RLC16Mk2 modules), the main communications 

interface is the LAN (Ethernet) connector on the 

front panel of each MPC4Mk2 module, which is 

used for used for communication with the 

VibroSight® software running on an external 

computer.

In a VM600Mk2 rack (ABE4x), the VME bus can be 

used to share information between modules in 

the rack. For example, an MPC4Mk2 + IOC4Mk2

module can provide information such as 

measurement, alarm and/or status data to a set 

of CPUMk2 + IOCMk2 modules which can then 

share the information via one of its industry 

standard fieldbuses.

In a VM600Mk2 system (one or more 

MPC4Mk2 + IOC4Mk2 modules and any associated 

MPC4Mk2 modules), the RLC16Mk2 modules are 

controlled and operated by a MPC4Mk2, as 

determined by the configuration. The VM600Mk2

rack’s Open collector (OC) bus and Raw bus are 

used to exchange control and status information 

between the MPC4Mk2 + IOC4Mk2 and RLC16Mk2

modules.

Relays

The MPC4Mk2 + IOC4Mk2 machinery protection 

modules include five relays. The four userconfigurable relays (RL1 to RL4) can be used by a 

VM600Mk2 system to remotely indicate system 

alarm and/or status information. While, a 

common circuit-fault relay (FAULT) is used to 

indicate a problem with the MPC4Mk2 + IOC4Mk2

modules as detected by the internal diagnostics 

(BIST).

The relays in a VM600Mk2 system (specifically one 

or more sets of MPC4Mk2 + IOC4Mk2 modules and 

any associated RLC16Mk2 modules), are driven by 

control circuitry that supports a VM600Mk2 system 

safety-line, that is, a system-wide control signal 

that automatically drives all system relays 

(IOC4Mk2 and RLC16Mk2) and analog outputs 

(IOC4Mk2) to a safe state should a problem be 

detected. In this way, IOC4Mk2 and RLC16Mk2

relays configured as normally energised (NE) can 

always be de-energised in the event of a problem 

with one of the components of the relay coil 

control signal.

Note: This supports the “de-energise to trip 

principle” required in safety-related applications.

Software

MPC4Mk2 + IOC4Mk2 modules, as part of a 

VM600Mk2 system), are software configured using 

the VibroSight® software.

To meet stringent cybersecurity and API 670 

requirements, MPC4Mk2 + IOC4Mk2 modules 

segregate machinery protection (MPS) and 

condition monitoring (CMS) by using separate 

configurations and different VibroSight 

configuration software:

• VibroSight Protect supports the configuration 

and operation of the machinery protection (MPS) 

functionality for a VM600Mk2 system.

• VibroSight Capture supports the configuration 

and operation of the condition monitoring (CMS) 

functionality for a VM600Mk2 system.

• Other VibroSight software modules support 

operations such as data display and analysis 

(VibroSight Vision), data logging and postprocessing (VibroSight Server) system 

maintenance (VibroSight System Manager), etc.

DESCRIPTION (continued)

More generally for extended condition monitoring 

system (CMS) applications, the VibroSight 

software supports the configuration and 

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 CPUMk2 + IOCMk2

modules.

Note: The VibroSight® software is also from the

vibro-meter® product line.

Applications information

As part of a VM600Mk2 system, 

MPC4Mk2 + IOC4Mk2 machinery protection 

modules are ideal for the monitoring and 

protection 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 range (on input) : 2 Hz to 50 kHz

• Speed / frequency measurement 

range

: 1 to 65535 RPM / 1 Hz to 1092 Hz.

Note: After division by number of wheel teeth (1 to 255).

• 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.

Note: 10 Hz DC filter (see DC filtering on page 6).

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

Input impedance

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

• Current : 200 Ω ±0.2%

Dynamic input range : ≥72 dB

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 an auxiliary input when it is configured as a DC input.

Sensor/measurement chain OK check

Number of levels : Up to 16 configurable threshold levels (16 DC regions)

OK level range

• Voltage inputs : ±20 VDC

• Current inputs : 0 to 23 mA

Operating principle

• SIL safety sensors : Line-fault detection of conditions such as a problem with the sensor 

and/or cabling, problem with the signal conditioner, and/or other 

problem with the measurement chain or power supply.

Note: Requires a SIL safety sensor/measurement chain that 

provides a suitable diagnostic signal (DC bias level), for example, 

measurement chains using IPC707 or IQS900 signal conditioners.

• Standard sensors : Powered sensors – line-fault detection of conditions such as

open-circuit or short-circuit.

Unpowered sensors – line-fault detection of conditions such as

open-circuit.

Digital signal processing

Analogue to digital converter (ADC) : 24 bit

Dynamic range : ≥80 dB

Frequency bandwidth : 0 Hz to 20 kHz

Accuracy

• Amplitude : ≤1% of input full scale

• Phase : ≤1.5°

Digital filtering

• Notch filter : 50 or 60 Hz

• ISO 2954 filter : 10 Hz to 1 kHz (−3 dB), −24 dB/octave

• Band-pass filter : <0.1 dB ripple in pass band, >55 dB attenuation in stop band, 0.1 or 

3 dB attenuation at cutoff, −24 to −60 dB/octave slope

• High-pass filter : 0.25 to 400 Hz

• Low-pass filter : 10 Hz to 20 kHz

Measurement resolution : 2048 point waveform / 800 line spectrum

FFT window : Hanning

FFT resolution : 800 spectral lines

Integration count : 0, 1 or 2

Qualifiers (rectifiers) : RMS, Peak, Peak-Peak and Average.

Scaled Peak, Scaled Peak-Peak and Scaled Average.

Extracted data (measurements) : 2 to 10 processed outputs per channel/processing function.

See Processing functions on page 7.

Extracted data type : Scalar, Vector

Order tracking : Digital resampling

Update rate (internal) : 20 ms min. for time domain processing.

100 ms min. for frequency domain processing.

VibroSight® software update rate 

(external)

: Configurable as 100 ms, 200 ms, 500 ms, 1 s, 2 s, 5 s, 10 s, 20 s, 50 s, … 

Processing functions

The following configurable signal processing blocks and measurements are supported by the 

MPC4Mk2 + IOC4Mk2 modules: •

Single-channel processing

Bearing absolute vibration (BAV) – fixed frequency or order tracked

• Dynamic channels only (piezoelectric vibration sensors)

• ISO 2954 or band-pass filtering

• Up to 10 measurements for fixed-frequency data acquisition: up to 6 time-domain measurements (2 direct 

and 2 per integration level) and up to 4 frequency-domain measurements

• Up to 6 measurements for order-tracked data acquisition: up to 2 time-domain measurements (2 direct) and

up to 4 frequency-domain measurements

• 1 speed measurement from the associated tachometer.

•

Broad-band pressure (BBP) – fixed frequency or order tracked

• Dynamic channels only (dynamic pressure sensors)

• Band-pass and notch filtering

• Up to 6 measurements for fixed-frequency or order-tracked data acquisition:

up to 2 time-domain measurements and up to 4 frequency-domain measurements

Shaft relative vibration (SRV) – fixed frequency or order tracked

• Dynamic channels only (proximity sensors)

• Band-pass filtering

• Up to 6 measurements for fixed-frequency or order-tracked data acquisition:

up to 2 time-domain measurements and up to 4 frequency-domain measurements (AC displacement)

• 1 quasi-static measurement (DC gap)

• 1 speed measurement from the associated tachometer.

Note: Shaft relative vibration (SRV) processing outputs include both dynamic (AC) and quasi-static (DC) 

components.

•

Position/displacement (PS)

• Dynamic or auxiliary channels

• 1 quasi-static measurement (DC gap).

Note: Position/displacement processing is equivalent to the DC gap component of Shaft relative vibration 

(SRV) processing.

•

Shaft axial position – collar (SAPC)

• Dynamic or auxiliary channels

• 1 quasi-static measurement (position).

•

Shaft axial position – shaft end (SAPS)

• Dynamic or auxiliary channels

• 1 quasi-static measurement (position).

•

Rotor position (RPS)

• Dynamic or auxiliary channels

• 1 quasi-static measurement (position).

•

Differential expansion – collar (DE)

• Dynamic or auxiliary channels

• 1 quasi-static measurement (position).

•

Rotor expansion – collar (RE)

• Dynamic or auxiliary channels

• 1 quasi-static measurement (position).

•

Quasi-static pressure (QSP)

• Dynamic or auxiliary channels

• 1 quasi-static measurement (position).

•

Quasi-static temperature (QST)

• Dynamic or auxiliary channels

• 1 quasi-static measurement (position).

•

Speed (SP)

• Auxiliary channels only

• 1 speed measurement.

Multi-channel processing

Shaft absolute vibration (SAV)

• Two dynamic channels only – of types BAV and SRV

• Identical filter types and cut off frequencies

• 1 time-domain measurement.

•

X-Y shaft relative processing (SMAX)

• Two dynamic channels only – of type SRV

• Identical filter types and cut off frequencies

• 1 time-domain Smax measurement:

Smax (PEAK-PEAK) according to ISO 7919-1 Method B, or

Smax (PEAK) or Smax (PEAK-PEAK) according to ISO 7919-1 Method C.

Dual mathematical function (DMF)

• Two dynamic channels only

• Identical processing types and rectifier types

• 1 mathematically calculated measurement:

Sum, Subtraction, RMS Sum, RMS Subtraction, Min or Max.

Differential housing expansion (DHE)

• Two dynamic channels only

• Identical processing types and rectifier types

• 1 mathematically calculated measurement:

Sum, Subtraction, RMS Sum, RMS Subtraction, Min or Max.

Notes

In general, MPC4Mk2 + IOC4Mk2 modules support one processing block per input channel.

A maximum of 6 processing blocks can be configured per MPC4Mk2 module. A maximum of 3 multi-channel 

processing blocks can be configured per MPC4Mk2 module (two for dynamic input channels and one for 

auxiliary input channels). There are 2 to 10 processed outputs (data extractions) per processing function, 

depending on the function.

Alarm processing

Alarms : Alarm with configurable limits (severity levels), hysteresis and time 

delay per processed output (data extraction)

Time delay : Up to 60 s in steps of 100 ms

Hysteresis : Up to 20% of the alarm level (physical quantity)

Severity levels

• Machinery protection applications : Out of range+, Danger+, Alert+,

Normal,

Alert−, Danger−, Out of range−

• Basic condition monitoring 

applications

: Out of range+, Danger+, Alert+, Information+,

Normal,

Information−, Alert−, Danger−, Out of range−

Adaptive monitoring : Adaptive monitoring uses a control parameter provided by an 

auxiliary channel (typically speed) to multiply the configured alarm 

limits by multiple coefficients configured for different ranges of the 

control parameter.

Trip multiplier uses the DSI TM control signal to multiply the 

configured alarm limits by a single configurable coefficient. 

See Discrete signal interface (DSI) inputs on page 10.

Alarm combination

Logic functions : AND, OR and majority voting logic (1oo2, 2oo2 and 2oo3), with 

optional inversion of individual inputs

Level 1 (basic) logic functions

• Number : 32

• Number of inputs per logic function : 32

• Configurable inputs : Sensor OK checks, measurement alarms (such as Danger+, Alert+, 

Alert− and Danger−) and/or associated data quality indicators 

(status bits)

Level 2 (advanced) logic functions

• Number : 32

• Number of inputs per logic function : 32

• Configurable inputs : Outputs from level 1 (basic) logic functions.

Note: Level 1 (basic) and level 2 (advanced) logic functions can 

be combined to generate more complex logic function.

Alarm update rate (internal) : 100 ms max.

Note: This is the time required for MPC4Mk2 + IOC4Mk2 modules to 

detect and initiate an alarm, including output relay (RL1 to RL4) 

activation.

Discrete signal interface (DSI) inputs

Control signal

• Alarm bypass (AB) : A closed contact between the DSI AB and RET inputs inhibits the 

activation of alarms and relays on MPC4Mk2 + IOC4Mk2 modules.

Note: The common circuit-fault relay (FAULT) is activated when 

Alarm bypass (AB) is enabled.

• Alarm reset (AR) : A closed contact between the DSI AR and RET inputs resets (clears) 

the alarms and relays latched by MPC4Mk2 + IOC4Mk2 modules.

Note: The Alarm reset (AR) input is edge-sensitive and a high-to-low 

transition is required to activate the reset. The Alarm reset (AR) input 

should not be held low and must transition low-to-high before 

another reset (high-to-low) can activate the reset.

• Trip multiply (TM) : A closed contact between the DSI TM and RET inputs multiplies the 

configured alarm levels for MPC4Mk2 + IOC4Mk2 modules by a scale 

factor (software configurable)

Operating principle : Detection of an open circuit or a closed circuit on the input

Buffered outputs – dynamic channels

Number : 4

Type : Buffered outputs (buffered “raw” analog signal).

Buffered analog signals corresponding to dynamic channel input 

channels (CH1 to CH4) are available on BNC connectors on the 

MPC4Mk2 module (front of rack) and on the J2 screw-terminal 

connector on the IOC4Mk2 module (rear of rack).

See Connectors on page 17.

Frequency bandwidth : DC to 60 kHz

Output impedance : <5 Ω

Accuracy

• Amplitude : ± 0.1 dB up to 20 kHz.

± 3 dB from 20 to 60 kHz.

• Phase : <1° from 10 Hz to 2 kHz.

<15° from 2 to 20 kHz.

Transfer ratios

• Voltage input : 1 V/V

• Current input : 0.2 V/mA

Admissible load on output

• Resistance : ≥50 kΩ

• Capacitance : Able to drive up to 3 m of cable with a typical capacitance 

of 100 pF/m

• Impedance : >50 kΩ with a load capacitance <5 nF

Buffered outputs – auxiliary channels

Number : 2

Type : Buffered outputs (buffered “raw” analog signal or TTL-level signal).

Buffered analog signals corresponding to auxiliary input 

channels (AX1 and AX2) are available on BNC connectors on the 

MPC4Mk2 module (front of rack) and on the J2 connector on the 

IOC4Mk2 module (rear of rack).

See Connectors on page 17.

Note: When an auxiliary input is configured as a tachometer input, 

a buffered TTL-level signal corresponding to the auxiliary input 

channel (AX1 or AX2) is available on the J2 connector on the 

IOC4Mk2 module (rear of rack). When an auxiliary input is 

configured as a DC input, no digital TTL-level signal is available.

Frequency bandwidth : DC to 60 kHz

Output impedance

• Buffered TTL-level signal

(tachometer input)

: <300 Ω

• Buffered “raw” analog signal

(DC input)

: <5 Ω

Signal levels : 0 to 5 V TTL-compatible signal (non-inverting)

Admissible load on output

• Resistance : >50 kΩ

• Capacitance : Able to drive up to 3 m of cable with a typical capacitance 

of 100 pF/m

• Impedance : >50 kΩ with a load capacitance <5 nF

Analog outputs

Number of local outputs : 4 single-ended outputs.

Used to output quasi-static measurement signals (DC).

Individually configurable as either current or voltage output signals.

Current outputs

• Range : 4 to 20 mA.

Two modes of operation are supported, as follows:

• Mode 1, measured value with quality checks – the analog output 

is driven in the 4 to 20 mA signal range during normal operation, 

and the analog output is driven to 2 mA to indicate a problem.

• Mode 2, measured value without quality checks – the analog 

output is driven in the 2 to 23 mA signal range.

Note: Current outputs are 0 mA ± 0.5 mA when disabled.

• Resolution : 10 µA

• Accuracy : ≤1% of full scale

• Admissible load on output : >360 Ω

Voltage outputs

• Range : 0 to 10 V.

Note: Voltage outputs are 0 V ± 10 mV when disabled.

• Resolution : 2.5 mV

• Accuracy : ≤1% of full scale

• Admissible load on output : >50 kΩ with a load capacitance <5 nF

Update rate / frequency bandwidth : 100 ms / 10 Hz max.

Short-circuit protection : Yes

Discrete outputs

Relays

• Number : 5.

4 × output relays (RL1 to RL4) – suitable for alarm and/or 

status outputs.

1 × common circuit-fault relay (FAULT) – for fault indication.

See Relay characteristics on page 14.

• Configurable functions : Normally energized (NE) or normally de-energized (NDE).

Latched or unlatched.

• Configurable inputs : From the sensor OK checks, the measurement alarms (Danger+, 

Alert+, Alert−, Danger−) and/or the logic functions of the MPC4Mk2

module

Communication interfaces

External (Ethernet)

• Number : 1.

Available on LAN connector of the MPC4Mk2 module.

See Connectors on page 17.

• Network interface : 10/100BASE-TX

• Data transfer rate : Up to 100 Mbps

• Maximum distances : System Ethernet communications can support distances up to 

100 m at 100 Mbps, depending on Ethernet cabling.

For distances greater than the specified maximum, the Ethernet 

interface operates at reduced data transfer rates.

• Protocols : TCP/IP (proprietary protocols) for communication with a computer 

running software such as VibroSight

Internal (VME) • Bus interface : A24/D16 slave mode Note: In a VM600Mk2 rack (ABE4x), the VME bus can be used to share information between modules in the rack. For example, MPC4Mk2 + IOC4Mk2 modules can provide information such as measurement, alarm and status data to CPUMk2 + IOCMk2 rack controller modules which can then share the information via one of its industry standard fieldbuses. While in the opposite direction, CPUMk2 + IOCMk2 rack controller modules can issue alarm bypass (AB), alarm reset (AR) and trip multiply (TM) commands to MPC4Mk2 + IOC4Mk2 modules in the rack (when modules are Unlocked (maintenance operating mode)). VM600Mk2 module compatibility : The MPC4Mk2 + IOC4Mk2 modules are compatible with RLC16Mk2 modules as part of a VM600Mk2 system. The MPC4Mk2 + IOC4Mk2 modules include benefits and features such as improved measurement capability, VM600Mk2 system safety-line functionality and module diagnostics (BIST) that are not supported by the MPC4/IOC4T card pair. Note: In a VM600Mk2 system, the MPC4Mk2 module automatically configures MPC4Mk2 module relays as normally energized (NE) or normally de-energized (NDE), as per the configuration created using VibroSight Protect, whereas the RLC16 relay card uses jumpers on the card to manually configure the relays as NE or NDE. System communications External : System communication interface (Ethernet) for communication with VibroSight® software running on an external computer Internal – VM600Mk2 VME : VME bus interface for communication with controlling/processing modules via rack backplane. For example, with CPUMk2 + IOCMk2 rack controller modules. Internal – VM600Mk2 rack buses : Open collector (OC) bus and/or Raw bus to share and monitor RLC16Mk2 module relays, and distribute the system-wide safety-line control signal. Raw bus to monitor/share the RLC16Mk2 module’s status. Note: Generally, in a VM600Mk2 rack (ABE4x), the Raw bus is used to share dynamic input signals between processing modules, the Tacho bus is used to share tachometer (speed) input signals between processing modules, and the Open collector (OC) bus is used by processing modules to drive relay modules, all in the same rack. For example, the Raw bus and the Tacho bus are commonly used to share sensor signals (vibration and speed respectively) between different machinery protection modules and/or condition monitoring modules. Specifically for a VM600Mk2 system in a VM600Mk2 rack (ABE4x), the Open collector (OC) bus and/or Raw bus can be used to connect up to 32 outputs from a set of MPC4Mk2 + IOC4Mk2 modules to RLC16Mk2 relay modules in the same rack, if additional relays are required. External communication links/connections • Connection to a computer/network : The system communication interface (LAN connector on MPC4Mk2 module) can be used for connections/communications between the MPC4Mk2 module and a computer/network, using standard Ethernet cabling. See Connectors on page 17. • VibroSight® software : Used for the configuration of a VM600Mk2 system (one or more MPC4Mk2 + IOC4Mk2 modules and any associated RLC16Mk2 modules)

Configuration

MPC4Mk2/IOC4Mk2 modules : Software configurable via/over Ethernet, using a computer running 

the VibroSight® software.

Note: Jumpers on the IOC4Mk2 module are manually configured to 

select the VM600Mk2 rack’s Open collector (OC) bus and/or Raw 

bus lines that control and monitor the module’s relays, and 

distribute the system-wide VM600Mk2 system safety-line control 

signal. The jumper information is generated by the VibroSight®

software.

Relay characteristics

Number : 4 × user-configurable relays (RL1 to RL4).

1 × common circuit-fault relay (FAULT).

Type : Single-pole double-throw (SPDT) / 1 Form C,

epoxy-sealed or equivalent

Contact arrangement : 1 × COM, 1 × NC and 1 × NO contact per relay

(RL1 to RL4 and FAULT).

Additional fused COM contact for common circuit-fault relay 

(FAULT).

See Connectors on page 17.

Maximum switching power : 440 VAC / 125 VDC

Maximum switching voltage : 2500 VA / 300 W.

Note: If the switching voltage is >30 VDC, then special precautions 

must be taken. Contact Meggitt SA for more information.

Maximum switching current : 10 A

Safety approved contact rating : 10 A at 250 VAC / 10 A at 30 VDC

Maximum switching capacity curves :

Operate / release time : 7 / 3 ms typ.

Dielectric strength

• Between open contacts : 1000 VAC (RMS)

• Between contact and coil : 5000 VAC (RMS)

S

Insulation resistance : 1000 MΩ min. (at 500 VDC, 50% relative humidity (RH))

Mechanical life : >1 × 107 operations

Electrical life : >1 × 105 operations (at 8 A, 250 VAC)

When used in a VM600Mk2 slimline rack (ABE056) with a DC power supply, the relay contacts on an IOC4Mk2

module have a maximum switching voltage of 70 VDC / 33 VAC (RMS) (46.7 VAC (PEAK)).

Environmental

Temperature

• Operating : −20 to 65°C (−4 to 149°F)

• Storage : −40 to 85°C (−40 to 185°F)

Humidity

• Operating and storage : 0 to 95% relative humidity (RH), non-condensing

Altitude : 2000 m (6560 ft) max.

Note: Reduced air density affects cooling ability.

Approvals

Conformity : CE marking, European Union (EU) declaration of conformity

Electromagnetic compatibility : EN 61000-6-2:2005.

EN 61000-6-4:2007 + A1:2011.

Electrical safety : EN 61010-1:2010.

CAN/CSA-C22.2 No. 61010-1.

Environmental management : RoHS compliant (2011/65/EU)

Insulation coordination for measuring 

relays and protection equipment

: Separate circuits according to IEC 60255-27

Note: Some certifications and approvals for the VM600Mk2 MPC4Mk2 + IOC4Mk2 modules are pending.

Power supply to module (input)

Power source : VM600Mk2 rack power supply

Supply voltages : +5 VDC and ±12 VDC

Consumption

• MPC4Mk2 : <6 W

• IOC4Mk2 : <9 W

Total power consumption

(set of MPC4Mk2/IOC4Mk2 modules)

: <15 W

Power supplies to sensors (output)

Number : 6 × independent sensor power supplies.

Note: One per input/channel (CH1 to CH4, AX1 and AX2).

Power supply output

• Constant voltage : +24 or −24 VDC ±3% at up to 35 mA max.

Note: Short-circuit protected.

• Constant current : +6 mA ±1%.

Note: Voltage compliance >22 VDC.

S

Control inputs

MPC4Mk2

• Button 1 (left) : Used to run the proof test for MPC4Mk2 + IOC4Mk2 modules

• Button 2 (right) : Used to lock/unlock MPC4Mk2 + IOC4Mk2 modules, that is, to switch 

between the main operating modes of a VM600Mk2 system 

(MPC4Mk2 + IOC4Mk2 modules and any associated RLC16Mk2

modules), as follows:

• Locked (secure operating mode) – the VM600Mk2 system

performs its monitoring and protection functions while ensuring 

the security of the modules/system and it’s configuration. That is, 

the configuration cannot be changed and maintenance activities 

cannot be performed.

• Unlocked (maintenance operating mode) – the VM600Mk2

system performs its monitoring and protection functions without 

ensuring the security of the modules/system and it’s configuration. 

That is, the configuration can be changed and maintenance 

activities can be performed.

Note: Physical access to a VM600Mk2 system (specifically, the 

MPC4Mk2 module) is required in order to change the operating 

mode and therefore to be able to change the machinery 

protection (MPS) functionality for a VM600Mk2 system.

• Reset : Simultaneously pushing buttons 1 (left) and 2 (right) is used to reset 

a set of MPC4Mk2 + IOC4Mk2 modules and any associated RLC16Mk2

modules (VM600Mk2 system), resulting in a reboot and power-on 

self-test (POST)

IOC4Mk2

• DSI signals : See Discrete signal interface (DSI) inputs on page 10

Status indicators (LEDs)

MPC4Mk2

• DIAG/STATUS : Multicolour LED used to indicate the status of the 

MPC4Mk2 + IOC4Mk2 modules, such as normal operation, 

configuration status or internal hardware or firmware failures

• CH1 to CH4 : Multicolour LEDs used to indicate the status of the dynamic 

channels (CH1 to CH4)

• AX1 and AX2 : Multicolour LEDs used to indicate the status of the auxiliary 

channels (AX1 and AX2)

• Lock/Unlock : LED used to indicate the main operating mode of the 

MPC4Mk2 + IOC4Mk2 modules (VM600Mk2 system): 

Locked (safety operating mode) or 

Unlocked (maintenance operating mode)

• LAN : Separate Link and Activity LEDs to indicate the status of system 

LAN (Ethernet) communications

Connectors

MPC4Mk2

• CH1 to CH4 : BNC connectors (female).

Buffered “raw” sensor/measurement chain signals for the

dynamic channel inputs (CH1 to CH4).

Note: For the dynamic channels, the buffered “raw” outputs are 

analog signals.

• AX1 and AX2 : BNC connectors (female).

Buffered “raw” sensor/measurement chain signals for the

auxiliary channel inputs (AX1 and AX2).

Note: For the auxiliary channels, the buffered “raw” outputs are 

analog signals. Corresponding digital signals are available on J2.

• LAN : 8P8C (RJ45) modular jack, female.

System Ethernet for communication between the 

MPC4Mk2 + IOC4Mk2 modules and a computer running the 

VibroSight® software.

IOC4Mk2

• J1 : 24-pin S2L connector (male), compatible with 24-pin B2CF plug-in 

connectors (female) with PUSH IN spring connections and B2L plugin connectors (female) with tension clamp spring connections.

Inputs (analog signals) for the dynamic channels (CH1 to CH4) and 

the auxiliary channels (AX1 and AX2).

• J2 : 36-pin S2L connector (male), compatible with 36-pin B2CF plug-in 

connectors (female) with PUSH IN spring connections and B2L plugin connectors (female) with tension clamp spring connections.

Outputs (buffered “raw” signals) for the dynamic channels (CH1 to 

CH4) and the auxiliary channels (AX1 and AX2).

Outputs (digital (pulse train) signals (TTL-level)) for the auxiliary 

channels (AX1 and AX2).

Inputs and ground reference (digital signals) for the DSI control 

signals (AB, AR and TM).

Outputs (analog signals) for the analog DC outputs.

• J3 : 16-pin connector (male), compatible with 16-pin MC/STF plug-in 

connectors (female) with screw-terminal connections.

Outputs (contacts) for the common circuit-fault relay (FAULT) and 

the user-configurable relays (RL1 to RL4).

Notes

The connectors are removable to simplify installation and mounting.

There is 1 × COM, 1 × NC and 1 × NO contact available per user-configurable relay (RL1 to RL4).

There is 1 × COM, 1 × COM FUSED, 1 × NC and 1 × NO contact available per common circuit-fault relay 

(FAULT).

SPECIFICATIONS (continued)

Physical

MPC4Mk2

• Height : 6U (262 mm, 10.3 in)

• Width : 20 mm (0.8 in)

• Depth : 187 mm (7.4 in)

• Weight : 0.42 kg (0.93 lb) approx.

IOC4Mk2

• Height : 6U (262 mm, 10.3 in)

• Width : 20 mm (0.8 in)

• Depth : 125 mm (4.9 in)

• Weight : 0.31 kg (0.68 lb) approx.

Meggitt (Meggitt PLC) is a leading international engineering company, headquartered in England, that designs and delivers high-performance 

components and subsystems for aerospace, defence and selected energy markets. Meggitt comprises four customer-aligned divisions: 

Airframe Systems, Engine Systems, Energy & Equipment and Services & Support.

The Energy & Equipment division includes the Energy Sensing and Controls product group that specialises in sensing and monitoring solutions for a 

broad range of energy infrastructure, and control valves for industrial gas turbines, primarily for the Power Generation, Oil & Gas and Services markets. 

Energy & Equipment is headquartered in Switzerland (Meggitt SA) and incorporates the vibro-meter® product line, which has over 65 years of sensor 

and systems expertise and is trusted by original equipment manufacturers (OEMs) globally.

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writing. Before acquiring and/or using this product, you must evaluate it and determine if it is suitable for your intended application. You 

should also check our website at www.meggittsensing.com/energy for any updates to data sheets, certificates, product drawings, user 

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