Technical data

28
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