Communication modules enable the 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 modules are available:

• CM PtP RS232 BA;
  communication module with RS232 interface for the protocols Freeport, 3964(R) and USS; 9-pin sub D connector, max. 19.2 Kbit/s, 1 KB frame length, 2 KB receive buffer
• CM PtP RS232 HF;
  communication module with RS232 interface for the protocols Freeport, 3964(R), USS and Modbus RTU; 9-pin sub D connector, max. 115.2 Kbit/s, 4 KB frame length, 8 KB receive buffer
• CM PtP RS422/485 BA;
  communication module with RS422 and RS485 interface for the protocols Freeport, 3964(R) and USS; 15-pin sub D socket, max. 19.2 Kbit/s, 1 KB frame length, 2 KB receive buffer
• CM PtP RS422/485 HF;
  communication module with RS422 and RS485 interface for the protocols Freeport, 3964(R), USS and Modbus RTU; 15-pin sub D socket, max. 115.2 Kbit/s, 4 KB frame length, 8 KB receive buffer