Vibro-Meter ® VM600 CPUM and IOCN modular CPU card and input/output card

provide access to the primary and secondary 

Ethernet connections, and the serial connector 

(RS) provides access to the secondary serial 

connection.

In addition, the IOCN card includes two pairs of 

serial connectors (A and B) that provide access to 

the additional serial connections (from the 

optional serial communications module) that can 

be used to configure multi-drop RS-485 networks 

of VM600 racks.

Front-panel display

The CPUM front panel features an LCD display 

that uses display pages to show important 

information for the cards in a VM600 rack. For the 

CPUM itself, card run time, rack system time, rack 

(CPUM) security status, IP address/netmask and 

version information are displayed. While for MPC4 

and AMC8 cards, measurements, card type, 

version and run time are displayed.

For MPC4 and AMC8 cards, the level of the 

selected monitored output is displayed on a 

bargraph and numerically, with the Alert and 

Danger levels also indicated on the bar-graph. 

Measurement identification (slot and output 

number) is shown at the top of the display.

VM600 MPS rack (CPUM) security

The CPUM supports features that can be used to 

limit the functionality of a VM600 rack’s 

machinery protection system (MPS) that is 

available via the system Ethernet connections of 

a CPUM/IOCN card pair. Enabling VM600 MPS 

rack (CPUM) security helps to reduce the 

possibility of interference in the machinery 

protection function of the rack itself and in the 

machinery being monitored. Accordingly, CPUM 

rack security makes it easier for operators to 

comply with international security/critical 

infrastructure regulations.

The security features consists of two specific levels 

of protection integrated in the CPUM card: CPUM 

access lock (a “hardware” security feature) and 

VM600 MPSx password validation (a “software” 

security feature). Refer to the VM600 machinery 

protection system (MPS) hardware manual and 

the VM600 MPSx software manuals for further 

information.

VM600 event logging

The CPUM card automatically logs VM600 system 

events and measurement events to non-volatile 

memory in order to provide valuable information 

on the operating history of a system. Up to 10000 

of the most recent events are stored on the card 

for download as user-readable event log files 

using the VM600 MPSx software.

Software

The CPUM/IOCN is software configurable using 

the CPUM Configurator software.

The VM600 MPSx software supports the 

configuration and operation of MPC4/IOC4T 

card pairs for machinery protection applications, 

including the processing and presentation of 

measurement data for analysis. VM600 MPSx is 

also used to configure and manage CPUM/IOCN 

card pairs.

Note: The VM600 MPSx software is from the

Vibro-Meter® product line.

Applications information

The VM600 CPUM/IOCN rack controller and 

communications interface card pair is 

recommended for applications using multiple 

monitoring cards in a VM600 rack.

The rack controller functionality makes it easier to 

work with a VM600 machinery monitoring system – 

for installation, configuration, management and 

general operation. The CPUM/IOCN can 

manage the configuration of MPC4/IOC4T and 

AMC8/IOC8T card pairs, including hot-swapping. 

It can also manage the configuration of XMx16/

XIO16T card pairs, eliminating the need for a 

VibroSight Server in certain applications.

The communications interface functionality 

makes it easy to further process and share data 

from the monitoring cards (MPC4, AMC8 and/or 

XMC16) in a VM600 machinery protection, 

condition monitoring and/or combustion 

monitoring system with third-party systems such as 

a DCS or PLC using industry standard fieldbuses.

For further information, contact your local 

Meggitt representative.

Processing functions

Rack controller

• VM600 monitoring card configuration 

management

: Acts as a rack controller that manages the configuration of MPC4/

IOC4T and AMC8/IOC8T card pairs, including support for

“hot-swapping” with automatic configuration.

Can also manage the configuration of XMx16/XIO16T card pairs, 

for applications that do not require a VibroSight Server.

• Front-panel display : LCD display that uses display pages to show important information 

for the cards in a VM600 rack:

• Card run time, rack system time, rack (CPUM) security status, 

IP address/netmask and version info are displayed for the CPUM.

• Measurements (bargraph with alarm levels, and numerically), 

card type, version, and run time are displayed for the MPC4 and 

AMC8 cards in the rack.

• Fieldbus data processing 

(mathematical processing)

: Further processing of system data (measurement data and status 

information) before being shared by fieldbus.

The further processing supported includes basic mathematical 

functions such as arithmetic and logical operations, data selection, 

comparison, min/max and scaling functions, bit manipulation and