10 | Connection
STOBER
108
02/2019 | ID 442728.05
10.3.7
UL-compliant housing grounding
Note that UL-compliant operation requires just a single grounding conductor.
The chassis of the PS6A/SI6A units is to be bonded through the M6 grounding studs on the
PS6A units (4.0 Nm, 35 Lb.inch).
The chassis of the SI6A units are to be bonded by means of proper mounting of the SI6A unit(s)
by means of two mounting screws on top of the DL6B unit(s). The specified tightening torque for
these mounting screws on the DL6B units is: 3.5 Nm (31 Lb.inch).
Observe the order for assembly:
1
4
3
5
2
Fig. 28: Connection of the grounding conductor
1
M6 ground bolt
2
Contact disk
3
Cable lug
4
Washer
5
Nut
The contact disk, washer and nut are supplied with the drive controller.
In order to dimension the grounding, it must be ensured that the upstream fuse is triggered in
the event of a short circuit.
Observe the wiring example in the chapter