Dixell XWEB 3000 Instruction Manual download pdf (Page 10)

XWEB 3000 – rel.1.3–

Right connection

Wrong connection

• 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 errors 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 do 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.

10/111 1592010600

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 110 111

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Dixell XWEB 3000 Instruction Manual Page 10