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RS232 / CM-232

serial communication

The optional CM-232 communication card enables RS232 serial connection of the Active

Cube inverter to an external control device or PC to ANSI standard EIA/TIA-232E and

CCITT V.28. The standard deﬁnes the electrical and mechanical characteristics of serial

connections between data terminating equipment (DTE) and data communication

equipment (DCE).

The serial interface, in the form of a DB9 plug, features DCE type pinouts.

The serial transmission protocol ensures high data security and allows connection, also

without handshake signals, thereby reducing the required number of connection lines

to just three.

Maximum allowed distance between the various bus nodes (inverters) and the master

(PC, PLC) depends on the cable used and the selected transmission rate.

This option can be used as well for inverter programming and monitoring with VPlus

software.

Cable lenght Max Baud rate

up to 30m 19.2

up to 10m 115.2

Cable length limits the transmission

bandwith. Above table shows the match

between admissible cable lengths and

corresponding max kBaud rates. Values are

indicative and may signiﬁcantly change

in relation to the transmission cable

characteristics.

CM-232 module

RS232 line

PC/Notebook

Location of CM-232 module on the

frequency inverter

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BONFIGLIOLI Active Cube Wartungshandbuch Seite 28