
INSTALLATION
Page 32
DOC_DEV_IPL_User guide_D
10
RS485 isolated serial connection (IPL-X-261)
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 RS485 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.
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