Siemens SINUMERIK 840D sl Equipment Manual page 34

General information and networking
4.2 Connecting
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 4-3
USB flash drives
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 flash drives that deviate from these requirements have not been tested and may not be
recognized by the NCU.
Ethernet RJ45 interface X202
Connector designation:
Connector type:
34
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 flash drive:
• 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
X202
Standard RJ45 socket
Equipment Manual, 02/2024, A5E52918633B AA
Remark
+ 5 V (fused)
Data -
Data +
Ground (reference potential)
Handheld Terminal HT 8