Siemens Simatic Field PG Manual page 53

Connecting Devices to the USB Interface
You can connect single or multiple USB devices (mouse, keyboard or printer) to
one USB interface connector.
1. Open the port cover on the rear of the device.
2. Plug the USB device cable into the USB interface.
The Plug and Play operating system recognizes the device and makes it available.
If you wish to connect more than two USB devices you must use a HUB. Only one
of the interfaces can be used as high-current source (refer to the Appendix B,
Technical Data).
USB connector
Fig. 3-4
Note
Devices that do not have a USB plug (for example, printers) can be connected to
the USB interface via adapter.
Using a Mouse
You can connect a USB mouse parallel to the Touchpad.
SIMATIC Field PG Manual
A5E00075760-04
Configuring And Operating The SIMATIC Field PG
USB connectors
USB connector
3-13