INSTALLATION
DOC_DE_User guide_B
Page 27
9
RS422 isolated serial connection (XSLAN+X260)
The polarization and termination resistors can be selected with
DIP switches.
The termination resistor must be enabled when the product is
located at the extremity of the RS422 bus.
The polarization resistors must be enabled by one device of the
bus.
Up to 16 devices can be connected to the bus.
We recommend to use a shielded cable and twisted pairs.
When two devices or more are connected to the RS422 bus, the
XSLAN+ must be the only device to transmit data on the TX+/TX-
line towards all the other devices.
It means that the TX+/TX- line of the must be connected
to the RX+/RX- of all the other devices of the bus.
Micro-switches
No polarization
No termination resistor
470 Ohm polarization resistors
No termination resistor
No polarization
120 Ohm termination resistor
470 Ohms polarization resistors
120 Ohm termination resistor
All other combinations are prohibited
