VACON CX
Modbus user’s manual
Page
3
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Vacon Oy
Phone +358-201-2121
Fax: +358-201-212 205
1.
GENERAL
Vacon frequency converters can be connected to the Modbus by using the fieldbus board. The converter
can then be controlled, monitored and programmed from the Host system.
The used I/O can be also extended with the Fieldbus board:
•
4 digital inputs (standard signals)
•
4 digital outputs (standard signals)
•
Thermistor input (can be directly connected to the motor thermistors for overtemperature trip)
•
Encoder input
The Fieldbus board can be installed into the already existing place of the option board inside the frequency
converter.
The control connections are isolated from the mains potential and I/O ground is connected to the frame of
the device via a 1 M
Ω
resistor and 4.7 nF capacitor*. The control I/O ground can be connected also
directly to the frame by changing the position of the jumper X9 (GND ON/OFF) to ON-position. Digital
inputs and digital outputs are also isolated from the I/O ground.
NOTE !
Internal components and circuit boards (except for the isolated I/O terminals) are at mains
potential when the frequency converter is connected to the mains. This voltage is extremely
dangerous and may cause death or severe injury if you come in contact with it.
The control I/O terminals are isolated from the mains potential, but the I/Os (if jumper X9 is in
OFF position) may have dangerous voltage connected even if the power is off on the frequency
converter.
* Default value (X9 is GND OFF- position)
