Triton Go Product Manual |
Wiring and Connections
INGENIA | 05/29/2017
53
Some considerations for a proper earth connection are detailed next:
•
Switching noise can be coupled to the earth through the housing of the motor. This high-frequency noise
creates common mode current loop between drive and motor. Although the motor housing is connected
to earth through the system chassis, its electrical connection may have a relatively high impedance and
present a big loop. For this reason is essential to reduce the common mode current return path
impedance and its loop area.
• For reducing the return path impedance,
motor frame should be directly wired
to drive PE
terminals.
• PE wiring should be as close as possible to power cables, reducing current loop.
•
Power supply is another source of switching noise. The neutral of the grid transformer or the housing of
our power supply may also be connected to earth. For reducing noise and EMI, similar considerations
should be taken.
•
Directly wire power supply PE to drive PE
.
• PE wiring should be as close as possible to power supply cables.
• In order to avoid ground loops, it is a good practice to have a
central earth connection point (or
bus)
for all the electronics of the same bench. If multiple drives are supplied from the same power
supply or supply PE to drive PE connection is not practical (not enough connection terminals) connect
all PE terminals in a central connection bus.
• Whenever possible,
mount the Ingenia drive on a metallic conductive surface
connected to earth.
Use
good quality plated screws
that won’t oxidize or lose conductivity during the expected
lifetime. Note that the PE terminal is internally connected with the Triton Go Servo Drive standoffs.
• For achieving low impedance connections, use wires that are
short, thick, multistrand cables
or
preferably
conductive planes
. PE wire section should be, at least, the same as power supply cables.
Always
minimize PE connection length
.
For an even better EMI immunity,
use shielded or armored cables
with isolating jacket, connecting the shield
to PE with a cable clamp.
Earth plane reference
While some systems will not have a "real Earth" connection, use your
machine chassis
, the metallic
structure of the device or a good grounding conductive plane as your reference earth.
