Siemens Simatic Field PG Manual page 97

Micro-In
Plug for external microphone. Pinout:
Fig. 7-2
Headphone
Plug for external headphones. Pinout:
Fig. 7-3
SIMATIC Field PG Manual
A5E00075760-04
NF
3.5-mm Microphone phono plug
Microphone
Left
3.5-mm Stereo phono plug
Headphone
Mic- Mic
Power ground
Right GND
Hardware Information
7-7