HEIDENHAIN PROFIBUS-DP (DPV0) - Manual (Page 23)

Absolute encoder installation
23
3.2.1 Bus lines
Figure 10 Orientation of M12 bus connectors
Bus in line Bus out line
Function Pin Function Pin
Not connected 1 VP 1
A 2 A 2
Not connected 3 DGND 3
B 4 B 4
Chassis 5 Chassis 5
Table 8 Pinning M12 bus in/out lines
Bus in
Bus out