Category: Industry Trends

Description

AMC8 Card

The AMC8 is an analog monitoring card designed for use in the VM600 rack-mounted system

in the Meggitt Vibrometer® product family for machinery monitoring and protection applications.

This versatile card is capable of measuring and monitoring up to eight analog signal inputs

simultaneously.

The AMC8 card is available in two versions: a “standard” version and a “circuit independent” version,

both of which are available as card pairs using the corresponding IOC8T input/output card.

The AMC8 card is mounted on the front of the VM600 rack (ABE04x or ABE056) and the IOC8T I/O card is

mounted on the rear.

Both cards connect directly to the rack backplane via two connectors.

A pair of AMC8/IOC8T cards provides eight channels of temperature monitoring that accept resistance

temperature detector (RTD) and thermocouple (TC) temperature inputs as well as process inputs.

The source and type of each channel is selectable during card configuration.

Cold Junction Compensation (CJC) sensor processing is used for the thermocouple temperature

channel and can be used for two of the eight channels, also selectable during card configuration.

All inputs are conditioned and compared to user-configurable alarms that are defined through Meggitt’s

VM600 MPSx software.

A pair of AMC8/IOC8T cards is configured (i.e. operated independently) via the RS-232 port on the front

panel of the relevant AMC8 card.

The AMC8 card also provides access to the CPUx card (ABE04x only) in slot 0 of the VM600 rack via the

VME bus.

These interfaces allow the operator to configure the VM600 card, access measurements,

view detailed board status, upload firmware updates, and more.

The AMC8 card can drive the four local relays on the IOC8T card, as well as any of the 16 relays

on the RLC16 card using the VM600 rack’s raw bus and/or open collector (OC) bus.

These cards also provide analog signal outputs based on current (0 to 25 mA). Voltage outputs are also

supported.

Application Information

The AMC8/IOC8T card pair is ideally suited for machinery monitoring and protection in a variety of

industrial applications.

Parameters

Dynamic Signal Input

Filtering: Filtering to prevent electromagnetic interference (EC compliant).

Refer to the VM600 MPC4 Mechanical Protection Card datasheet for more information.

Buffered dynamic signal output

Filter: Filtered to prevent electromagnetic interference (EC compliant).

Refer to the VM600 MPC4 Machine Protection Card datasheet for more information.

Speed/phase reference input

Filter: Filtered to prevent electromagnetic interference (EC compliant).

Refer to the VM600 MPC4 Machine Protection Card datasheet for more information.

Discrete Signal Interface (DSI) inputs

Control signals

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

MPC4/IOC4T card’s alarm to lockout.

NOTE: The alarm reset input (DSI AR) is edge sensitive and requires a high to low transition to activate the

reset.

– Danger Bypass (DB) : A closed contact between the DSI DB and DSI RET inputs inhibits (bypasses) the

Danger Relay output.

– Trip Multiplier (TM): The closed contact between the DSI TM and DSI RET inputs multiplies

the alarm level by a scaling factor (configurable via software) for adaptive monitoring.

Principle of operation: Detects open or closed circuits on the inputs Alarm outputs

Alarm relays: 4 per IOC4T card.

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.

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.