Communications modules enable connection with an external communication partner to exchange data. Comprehensive parameterization options make it possible to adapt the control flexibly to the communication partner.
Modbus RTU master creates a Modbus RTU network for up to 30 Modbus slaves.

The following communication module is available:

• SIPLUS S7-1500 CM PtP RS 232 HF TX RAIL;
  communication module with RS 232 interface for the Freeport, 3964(R), USS and Modbus RTU protocols; 9-pin D-sub connector, max. 115.2 Kbps, 4 KB frame length, 8 KB receive buffer