Download MP 277 - Service, Support

Installing and connecting the device
4.3 Connecting the HMI device
Use only the approved cables to connect a SIMATIC S7 controller.
Standard cables are available for the connection. You can find additional information on this
on the Internet at Industry Mall (
Connecting PROFINET
Use a cross-cable for the PROFINET connection when using a point-to-point connection.
If you use PROFINET IO direct keys, the HMI device must be connected with a switch. For
detailed instructions regarding the installation of PROFINET networks, please refer to the
PROFINET system description manual.
Only connect the HMI device to public Ethernet networks using a switch or comparable
Configuring an RS 422/RS 485 interface
A DIP switch for the configuration of the RS 422/RS 485 interface is located on the back of
the HMI device.
In the factory state, the DIP switch is set for communication with the SIMATIC S7 PLC via
RS 485.
Note the diagrams of DIP switch settings on the rear panel of the HMI device.
MP 277
Operating Instructions, 07/2014, A5E02479740-02