YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 51 / 373

2.2 Protecting against electric noise
2-13
2.2.4 Cable shield clamp
A cable between a servo unit and a motor encoder must be shielded and grounded. To
securely connect the shield of the cable to a grounding plate, use a cable clamp as illustrated
below.
Cable clamping is not only for mechanically supporting a cable but also for securely ground-
ing its shield, and thus essential to the safe operation of the system. The recommended cable
clamping method is that stripping off a length of the insulation of a cable to expose its
shielding braid, placing a cable clamp over the shielding braid, and fixing the cable clamp to
a grounding plate, as illustrated below.
Fig. 2.2 Cable clamp
A grounding plate must be installed near a SERVOPACK as illustrated below.
Fig. 2.3 Grounding plate position
Cable
Shielding braid
Cable clamp
Cable clamp
Grounding plate
Cable
Minimum
19.5 19.5
19.5
30
Type 1
DF8401485
19.5
30
Type 2
DF8404817
6.5 8
Minimum
SERVOPACK
Connector
Cable
Cable clamp
Shielding braid
Grounding plate