Shielding Measures; External Components - Moog MSD Operation Manual

4.2.7

Shielding measures

You should take into account the following points for the shielding measures:
y Use only shielded mains, motor and signal cables. For all shielded connections, use cables with
double copper braiding with 60 to 70 % coverage.
y Connect the shield at both ends using a large area connection. Extending the shield to the
earthing point using a wire (pigtail) reduces the shielding effect by up to 90 %.
Figure 4.1 CORRECT shield connection
Figure 4.2 INCORRECT shield connection - do not extend to the earthing point (pigtail)
moog
ID no.: CA65642-001 06/2018
Electrical installation
Figure 4.3 Shield connection
Do not strip back too far the shield.
y
Shields are not allowed to be used to carry power, e.g. as a substitute for the N or PE conductor.
y
y The shielding effect can be improved by laying in metal ducts/tubes.
y Shields must be connected at one end as a minimum. Connection at multiple points is
recommended, otherwise potential equalisation currents may flow in physically extensive
installations.
4.2.8

External components

y Place larger loads near the supply.
Contactors, relays, solenoid valves (switched inductances) must be wired with suppressors.
y
The wiring must be directly connected to the respective coil.
Any switched inductance should be at least 200 mm (7.87 in) away from the process controlled
y
assemblies.
If you require further detailed information on installation, please contact the
Moog Helpline, see chapter 1.10.
MSD Single-Axis System Operation Manual AC-AC Servo Drive
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