dIXEL
Manual de operare Xweb5000
Always keep the serial cable away from power cables.
Always keep the serial cable away from electro-magnetic or frequency sources.
Do not connect shield to ground.
Do not connect the “Gnd” terminal.
Remember to draw a map of the line. This will help you to find an error if something is wrong.
The instrument with RS485 have “+” and “-“ terminals, respect the polarity.
To keep the line balanced it is necessary a 100 Ohm resistor at the end of the line (you ca use the RS
485+ and RS 485- terminals of the last instrument connected).
2.1.3 THE TTL OUTPUT
The instrument with RS485 on board does not need any kind of external interface module.
For instruments with external interface: keep the TTL cable away from power cables or frequency sources.
The XJ485 external interface must be connected with TTL cable to the instrument with TTL compatibility.
2.1.4 SERIAL ADDRESS OF THE INSTRUMENTS
Each instrument must be defined by its unique address.
Check the address into the Adr parameter value. Take reference to the instruction manual of the
instrument itself to find the right procedure to enter the programming and set the value.
The easiest way to work with the category functions is to set the addresses progressively for similar
groups of instruments which have the same application.
2.1.5 TERMINATION RESISTOR AND POLARIZATION RESISTOR
To keep balanced the RS485 the beginning and the end of line must be closed with a resistor of 120Ω.
If XWEB is placed at the beginning or at the end of the line, please active its termination resistor by
adding a jumper in position 3 (JMP3 on the back side of the unit). DO NOT add the jumper if XWEB is
placed in the middle of the RS485 line.
If in the setup there are NOT Dixell‟s controllers and you are experiencing communication problems,
please add the polarization resistors by adding a jumper in position 1 and 2 (JMP1 and JMP2 on the
back side of the unit).
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