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

Communication interfaces – serial

Number : 2

Serial interfaces

• Network interface : RS-422 or RS-485 (half-duplex (2-wire) or full-duplex (4-wire))

• Data transfer rate : Up to 115.2 kBaud

• Distance between devices : According to the relevant standard

• Network topologies : Point-to-point for RS-232 links.

Point-to-point or linear (daisy-chained) for RS-422/ RS-485 networks.

• Protocols : Modbus RTU

• Function : Fieldbus Modbus RTU communications

• Connectors : A and B on IOCN card (see Connectors on page 10)

• RS-485 (fieldbus) isolation : 500 VDC

Notes

Jumpers on the CPUM and IOCN cards are used to configure the required operation of serial and Ethernet 

interfaces and connectors. Refer to the VM600 machinery protection system (MPS) hardware manual for 

further information.

System communications

Internal : VME bus interface (A24 / D16 master mode) for communication 

with protection cards (MPC4 and AMC8) via VM600 rack 

backplane

External : System communication interfaces (serial and Ethernet) for 

communication with VM600 MPSx software running on an external 

computer.

See Communication interfaces – serial on page 6 and 

Communication interfaces – Ethernet on page 7.

External communication links/connections

• Connection to a computer/network : A serial communication interface (RS232 on CPUM card) can be 

used for connections/communications between a CPUM/IOCN 

card pair and a computer/network, using a standard serial cable.

See Communication interfaces – serial on page 6 and Connectors 

on page 10.

An Ethernet communication interface (NET on CPUM card or 1 on 

IOCN card) can be used for connections/communications 

between a CPUM/IOCN card pair and a computer/network, using 

standard cabling.

See Communication interfaces – Ethernet on page 7 and 

Connectors on page 10.

• Connection to a fieldbus

(third-party system)

: A serial fieldbus communication interface (RS on IOCN card) can 

be used for connections/communications between a CPUM/IOCN

card pair and serial-based fieldbuses (Modbus RTU).

See Communication interfaces – serial on page 6 and Connectors 

on page 10.

An Ethernet fieldbus communication interface (NET on CPUM card 

or 1 on IOCN card, or 2 on IOCN card) can be used for 

connections/communications between a CPUM/IOCN

card pair and Ethernet-based fieldbuses (Modbus TCP).

See Communication interfaces – Ethernet on page 7 and 

Connectors on page 10.

• VM600 MPSx software : Used for the configuration and operation of MPC4/IOC4T and 

AMC8/IOC8T card pairs (using the CPUM/IOCN card pair as a 

communications gateway)

• VibroSight® software : Used for the configuration of CPUM cards

Configuration

CPUM/IOCN card pair : Software configurable via Ethernet or serial, using a computer 

running the VM600 MPSx and CPUM Configurator software.

Note: Serial (RS-232 / RS-422 / RS-485) line configuration and 

Ethernet port to connector routing is determined by jumpers on the 

CPUM and IOCN cards.

S

Time synchronisation

Time reference for CPUM : Network time protocol (NTP) server or

CPUM’s internal real-time clock (RTC) with battery backup

Protocol used between VM600 cards 

and host computer

: Network time protocol (NTP)

Note: When VM600 system event and/or measurement event logging is used, the time and date must be 

configured for the CPUM in order for the timestamps in the event log files to be correct.

Environmental

Operating

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

• Humidity : 0 to 90% relative humidity, non-condensing

Storage

• Temperature : −25 to 80°C (−13 to 176°F)

• Humidity : 0 to 90% relative humidity, non-condensing

Approvals

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

EAC marking, Eurasian Customs Union (EACU) certificate/

declaration of conformity.

Electromagnetic compatibility : TR CU 020/2011

Electrical safety : TR CU 004/2011

Environmental management : RoHS compliant

Russian federal agency for technical 

regulation and metrology (Rosstandart)

: Pattern approval certificate CH.C.28.004.A N° 60224,

dated 11.11.2015

Power supply (to CPUM/IOCN)

Source : VM600 rack power supply

Voltage : 5 VDC

Power consumption

• CPUM : <10 W

• IOCN : <2 W

Total power consumption

(CPUM/IOCN card pair)

: ≤12 W

Control inputs (buttons)

CPUM

ALARM RESET : Used to reset all latched alarms (and associated relays) for all 

protection cards in the VM600 rack (MPC4/IOC4T and AMC8/

IOC8T)

OUT+ and OUT− : Used to select a measurement channel for the currently selected 

protection card (slot)

SLOT+ and SLOT− : Used to select a slot (protection card) in the VM600 rack

Note: OUT and SLOT button combinations are also used to enable 

or disable VM600 rack (CPUM) security, that is, limit the VM600 MPSx 

software to “read only” operations.

S

Status indicators (LEDs)

CPUM

DIAG : Green LED used to indicate the status of the CPUM card: off, 

normal operation and status of VM600 MPS rack (CPUM) security

OK : Green LED used to indicate the status of the OK system check 

(sensor OK link check) for the currently selected measurement 

channel

A

(Alert)

: Yellow LED used to indicate the status of the alarm monitoring (Alert