INSTALLATION
Page 28
DOC_DEV_IPL-E_User guide_A
Router Firewall IPL-E
RS485 isolated interface (IPL-E-261 or IPL-EW-261)
The RS485 (3 wires : A- / B+ plus the common voltage wire) interface is isolated.
The polarisation and termination resistors can be selected with DIP switches.
The polarisation résistors must be enabled by one device of the bus.
The termination resistor must be enabled with SW3 & SW4 when the router is located at the extremity of the
bus.
Up to 16 devices can be connected to the bus.
We recommend to use a shielded cable and twisted pairs.
If the line is exposed to lightning, we recommend to protect the router with a surge arrester.