The CP 443-5 Extended is the communications processor of the SIMATIC S7-400 for the PROFIBUS bus system.

It relieves the CPU of communication tasks and supports additional connections.

Communication possibilities of the S7-400 using communication modules:

• As master for PROFIBUS DP according to IEC 61158/EN 50170
• Communication with programming devices and HMI devices
• Communication with other SIMATIC S7 systems
• Communication with SIMATIC S5 programmable controllers

The number of CPs that can be used is dependent on the performance range of the CPU and on the communications services used.