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Where no cable of suitable cross-section is available, additional auxiliary power supplies must be used .
Example:
Suppose we have:
• PXC08
• PXITU (maximum power draw 100 mA)
• Connecting distance 200 m .
With a maximum power draw of 250 mA in this case use either a cable with cross-section 1 .5 mm², or use a 0 .5 mm² cable and an auxiliary
power supply connected at the end of the line, as shown below:
RS-485 CABLE
Screened 2 x 1 .5 mm² + twisted 2 x 0 .22 mm²
Control Unit
Maximum communication performance is guaranteed with the use of the cable as in the specs (PXC75) . The maximum communi-
cation speed between the peripherals is 115200 baud . If the cable indicated is not used, or problems arise with installation, the transmission
speed at the control unit may be reduced (38400, 9600, 4800 and 2400 baud) . The speed of the peripherals will be set automatically .
Device on bus
RS-485 CABLE
Screened 2 x 0 .5 mm² + twisted 2 x 0 .22 mm²
Control Unit
Auxiliary power supply
Device on bus
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