Pilz PMI m309 diag, Operating Manual, Page: 25 / 43

5-7 PMI m309 diag operating manual
Measures to protect against interference voltage
• Wire inductive loads (e.g. contactor coils, relay coils and solenoid valve
coils) using suppression elements (e.g. RC elements). This is particularly
important if these inductive loads are close to the supply voltage or are
fed from the same supply voltage.
• If strong magnetic fields are present, we recommend you use a bulkhead
separator, i.e. metal sheet (MU metal).
Connection example
1: Earth star point of
unit or control
cabinet
2: Earth bus bar
3: Supply voltage
4: Earthing terminal
(electronic)
5: Earthing bolt
(housing)
6: Data line
screening
Fig. 5-5: Connection example
1
24 V DC
2
0 V
3
4 5
3
4 5
6