Detail VSE 004 Vamp 40 RS-485 Module
VAMP 40 RS-485 Interface Module VSE 004 provides: a) Galvanically isolated RS-485 interface for LOCAL communication or EXTERNAL I/ O modules b) Galvanically isolated RS-485 interface for REMOTE communication. The RS-485 interface supports 2- wire connection. There is a dip switch to switch the termination resistors on or off. The direction control of the RS-485 transceiver is done automatically. The automatic direction control turns the transceiver to transmit mode after detecting the falling edge of a 0-bit. When the transceiver in changed to receive mode, the RS-485 line changes state to logic 1 state due to the biasing resistors.