24 V Dc Supply Voltage; Usb 3.1 Interface - Siemens SIMATIC S7-1500 Manual

Wiring
4.1 Terminal assignments and interface descriptions
4.1.2 24 V DC supply voltage
The following table shows the signal names and the descriptions of the pin assignment of
the 24 V DC supply voltage.
1 1L+ and 2L+ as well as 1M and 2M are bridged internally
2 Maximum 10 A permitted
4.1.3

USB 3.1 interface

The USB 3.1 interface is designed with a type A connection socket. The plug connector does
not have a strain relief. Provide strain relief for the USB cable with a 2.5 mm-wide cable tie.
The figure below shows the TM NPU with installed cable tie.
Only connect sensors and cables to the USB interface in which the shield and ground signal
are galvanically isolated.
If the shield and ground (PIN 4) are connected to each other, an impermissible current flows
over the cable shield in the event of a ground fault of the 24 V DC supply. The impermissible
current flows over the shield spring of the module and the grounded mounting rail.
If you are using components whose shield and ground signal are connected, you must supply
the TM NPU from an electrically isolated 24 V DC supply. Do not connect the ground of this
24 V DC supply to the functional ground (FE).
NOTE
Use of the USB camera Real Sense D435
If you are using the USB camera RealSense D435, note that the shield and the ground signal
are connected to each another in the camera.
20
View Signal name
1L+
2L+
1M
2M
1
24 V DC
24 V DC (for looping through)
Ground
Ground (for looping through)
Equipment Manual, 07/2023, A5E46384784-AC
Description
2
2
Technology Module TM NPU