Siemens 6ES7138-4DF00-0AB0The Siemens part number 6ES7138 4DF00 0AB0 is a versatile Modbus USS serial interface module tailored for the ET 200S distributed I O system. This module facilitates seamless communication between the ET 200S and a diverse range of devices using both Modbus and USS protocols, enhancing operational flexibility. It features a serial interface that can be configured for RS 232 or RS 422 485 communication, capable of connecting up to 32 slave devices in
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