Siemens SINUMERIK 840DE sl Manual page 28

Connecting
4.1 Pin assignment of the interfaces
In principle, USB interfaces have the following characteristics:
● Integrated power supply up to 500 mA for each socket.
● Maximum cable length 3 m (Length including the supply cable to the hub and the connected
terminal device; only 1 hub at maximum is permitted. It should be noted that some
keyboards already have a hub.)
● Hot-plugging-capable devices are connected during operation and are identified
automatically.
Note
Correct identification is only guaranteed for USB I/Os that comply to 100% with the USB
specification.
Table 4-1
USB sticks
If you want to connect a USB flash drive to the USB interface, you can use a USB flash drive
of any memory size. It must, however, meet the following minimum requirements:
● File system: FAT16 or FAT32
● Partitioning: only in PC partition format (MBR)
USB sticks that deviate from these requirements have not been tested and may not be
recognized by the NCU.
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NOTICE
Cables that are too long can cause the screen to freeze
Observe the following restrictions for the USB front interface for connecting operator
panels to the keyboard, mouse or USB FlashDrive:
● Maximum cable length: 1.8 m
● Extension cables are not permissible
Assignment of the USB interface
Type A socket Pin
1
2
3
4
Name Type
P5V_fused V
Data-
B
Data+
GND V
Remark
+ 5 V (fused)
Data -
Data +
Ground (reference potential)
Operator panel front: OP 015 black
Manual, 05/2019, A5E35227814B AB