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For example, in a typical application, these relays can be used to signal an MPC4 fault or

a problem detected by the common alarms (Sensor Normal, Alarm, and Hazard).

In addition, 32 digital signals representing alarms are transmitted to the rack backplane and

can be used by the optional RLC16 Relay Card and/or IRC4 Intelligent Relay Card (with optional jumpers)

mounted in the rack.

Application Information

The IOC4T, when paired with the MPC4 Machinery Protection Card, is ideally suited for

machinery monitoring and protection in a variety of industrial applications.

For more information on using the MPC4/IOC4T card pair, see

VM600 Machinery Protection System (MPS) Hardware Manual and the VM600 MPSx Software Manual.

For information on using the MPC4/IOC4T card pair in a functional safety environment, refer to the

VM600 Functional Safety manual.

The MPC4 card can drive the four local relays on the IOC4T card, as well as the relays on 

the RLC16 relay card and/or the IRC4 Smart Relay card via the Raw bus or open collector (OC) bus in the

VM600 chassis.

See Relay Characteristics on page 4 for IOC4T card relay functions.

Description

IOC4T Card

The IOC4T Input/Output card is the signal interface for Meggitt’s VM600 series MPC4 machine protection

card.

It is mounted on the rear of the VM600 rack and connects directly to the rack backplane via two

connectors.

Each IOC4T card is associated with the corresponding MPC4 card and is mounted directly to the rear of

the VM600 rack (ABE04x or ABE056).

The IOC4T operates in slave mode and communicates with the MPC4 through connector P2 using the

Industrial Packet (IP) interface.

The front panel of the IOC4T (rear of the VM600 frame) contains terminal strip connectors

for connecting the transmission cables from the measurement chain (sensors and/or signal conditioners).

The threaded terminal connectors are also used to input all signals from any

external control system and output all signals to any external control system.

The IOC4T card protects all inputs and outputs from electromagnetic interference (EMI)

and signal surges and complies with electromagnetic compatibility (EMC) standards.

The IOC4T connects raw dynamic (vibration) and velocity signals from sensors to the MPC4.

These signals are processed and passed back to the IOC4T and made available on its front panel (rear of

the VM600) terminal strip.

For dynamic signals, four on-board digital-to-analog converters (DACs) provide calibrated signal outputs

in the 0 to 10 V range.

In addition, four on-board voltage-to-current converters provide current output signals in the 4 to 20 mA

range (jumper optional).

The IOC4T contains four local relays that can be used for any specific alarm signal under software control.

Features

System isolation

The VM600Mk2 uses a single type of card (MPC4Mk2) for monitoring and condition monitoring.

However, these functions are tightly segregated to ensure API 670 compliance and reduce costs.

A separate (optional) XMV16 condition monitoring card is available for applications with a large number

of channels.

High channel density

The standalone VM600Mk2 protection card has 4 input channels, but each VM600 can be expanded

to a maximum of 48 input channels Mk2 racks, allowing vibration protection to be extended to the most

demanding rotating machinery.

Advanced Monitoring

The stand-alone VM600Mk2 condition monitoring card offers 16 dynamic channels and 4 tachometer

channels, which can all be independently configured to provide unrivaled accuracy and reliability.

Systems

System Features

SIL 2 certified (TÜV Nord)

Hot-swappable monitor card

Suitable for accelerometers, proximity probes, speed, dynamic pressure and icing detection sensors

Suitable for integration with VibroSight analysis and data processing software

Protection card (MPC4Mk2): 4 dynamic channels and 2 auxiliary channels

Monitoring card (XMV16): 16 dynamic channels and 4 tachometer channels

Standard 19-inch 6U machine

Design

The Vibrometer VM600Mk2 is designed to provide state-of-the-art vibration monitoring and protection (SIL 2),

especially for large critical rotating machinery with high channel counts.

Its modular 19-inch card allows the user to build a system to suit specific application requirements.

In addition, the system can be integrated with VibroSight software, which provides detailed insight into the

condition of rotating machinery and a wide range of analysis options.

Applications

The VM600Mk2 is suitable for plants where rotating machinery is concentrated in one area,

requiring centralized monitoring and a high channel count.

Typical applications include:

■ Gas turbines

■ Steam turbines

■ Water turbines

Other critical rotating machinery

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.

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.

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.

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. 

Description

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.

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),

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.