Siemens SINAMICS G150 Operating Instructions Manual page 105

Note
The LAN (Ethernet) interface does not support Auto MDI(X). For this reason, only crossover
cables may be used to connect devices.
For diagnostic purposes, the X127 LAN interface features a green and a yellow LED. These
LEDs indicate the following status information:
Table 4- 15
LED
Link port
Activity port
X140: serial interface (RS232)
The AOP30 operator panel for operating/parameterizing the device can be connected via the
serial interface. The interface is located on the underside of the Control Unit.
Table 4- 16
Connector type: 9-pin SUB D connector
Note
Connecting cable to the AOP30
The connection cable to AOP30 may only contain the three contacts which are shown in the
drawing; a completely allocated cable may not be used.
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
LED statuses for the X127 LAN interface
Color State
- Off
Green Continuous light
- Off
Yellow Flashing light
Serial interface (RS232) X140
Pin Designation
2 RxD
3 TxD
5 Ground
4.9 Signal connections
Description
Missing or faulty link
10 or 100 Mbit link available
No activity
Sending or receiving
Technical data
Receive data
Transmit data
Ground reference
Electrical installation
105