Connecting the cables, Wiring the harmonica – ElmoMC SimplIQ Digital Servo Drives-Harmonica Installation Guide User Manual
Page 19
Harmonica Installation Guide
Installation
MAN-HARIG (Ver. 1.902)
19
3.5. Connecting the Cables
The Harmonica has eight connectors.
3.5.1.
Wiring the Harmonica
Once the Harmonica is mounted, you are ready to wire the device. Proper wiring, grounding
and shielding are essential for ensuring safe, immune and optimal servo performance of the
Harmonica.
Caution:
Follow these instructions to ensure safe and proper wiring:
•
Use twisted and shielded wires for control, feedback and communication cables. For best
results, use an aluminum foil shield with copper braid.
•
The impedance of the wire must be as low as possible. The size of the wire must be thicker
than actually required by the carrying current. A 24, 26, 28 or 30 AWG wire for control and
feedback cables is satisfactory.
•
Use shielded wires for motor connections as well. If the wires are long, ensure that the
capacitance between the wires is not too high: C < 30 nF is satisfactory for most
applications.
•
Keep all wires and cables as short as possible.
•
Keep the motor wires as far away as possible from the feedback, control and
communication cables.
•
Ensure that in normal operating conditions, the shielded wires and drain carry no current.
The only time these conductors carry current is under abnormal conditions, when electrical
equipment has become a potential shock or fire hazard while conducting external EMI
interferences directly to ground, in order to prevent them from affecting the drive. Failing
to meet this requirement can result in drive/controller/host failure.
•
After completing the wiring, carefully inspect all wires to ensure tightness, good solder
joints and general safety.