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SIMATIC S7 single license for MODBUS Master V3.1 with installation package and documentation media, including HW dongle and Class A specification.
SIMATIC S7 MODBUS Slave V3.1 single license for 1 installation with R-SW, SW and DOCU on CD and HW dongle.
SIMATIC S7 MODBUS Master V3.1 single license for 1 installation R-SW, including required hardware dongle and reference hardware CP 341 and CP 441-2.