MR-0124 - RS-422 interface, with galvanic isolation

The MR-0124 submodule provides the conversion of the serial interface TTL signals to the galvanically isolated RS-422 interface. The interface allows a connection of two cooperating devices (point to point).

Every single line (RxD and TxD) must be terminated at the end of the line with 120 Ohm terminating resistors. Galvanic isolation of the serial interface is provided by a built-in converter and no external supply is required. More details concerning the submodule, its internal connection and settings are specified in the documentation TXV 004 03.

Table 1 Wiring of the CH2 serial channel connector fitted with the MR-0124 submodule.

¹⁾ Using the signal is described in the manual TXV 004 03. The idle signal level corresponds to logical level 1.