Siemens SIMOTICS XP 1MB1 series - Terminal Boxes, End Shields, Grounding Conductors, Sheet Metal Fan Covers; Terminal Board and Grounding; Screw Lock Washers; Links

Maintenance
9.3 Corrective maintenance
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A
133
Observe the documentation for tightening torques of the cable entries and sealing plugs for
direct mounting at the machine as well as additional glands (e.g. adapters).
9.3.8
Terminal boxes, end shields, grounding conductors, sheet metal fan covers
If no other tightening torques are specified, then the values in the following table apply.
Table 9- 4 Tightening torques for screws on the terminal box, end shields, screw-type grounding conductor connections
Thread ∅
M 3.5
M 4
M 5
M 6
M 8
M 10
M 12
M 16
M20
Nm
min
0.8
2
3.5
6
16
28
46
110
225
max 1.2 3 5 9 24 42 70 165 340
9.3.9
Terminal board and grounding
Table 9- 5 Tightening torques for electrical connections on the terminal board and grounding
Thread ∅
M 3.5
M 4
M 5
M 6
M 8
M 10
M 12
M 16
Nm
min
0.8
0.8
1.8
2.7
5.5
9
14
27
Max.
1.2
1.2
2.5
4
8
13
20
40
9.3.10
Screw lock washers
Nuts or bolts that are mounted together with locking, resilient and/or force-distributing
elements (e.g., safety plates, spring-lock washers, etc.) must be refitted together with
identical, fully functional elements.
Locking and sealing elements must always be replaced!
9.3.11
Links
● Replace any corroded screws.
● Take care not to damage the insulation of live parts.
● Document the position of any rating and supplementary plates that have been removed.
● Avoid damaging the centering edges.