ElmoMC AC Input Digital Servo Drives-Bassoon - Manual (Page 20)

Bassoon Installation Guide Installation
MAN-BASIG (Ver. 1.502)
www.elmomc.com
20
3.5. Connecting the Cables
The Bassoon has 10 connectors.
3.5.1. Wiring the Bassoon
Once the Bassoon 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
Bassoon.
Caution:
Follow these instructions to ensure safe and proper wiring:
• Use twisted-pair shielded wires for control, feedback and communication ports. For best
results, use an aluminum foil shield covered by copper braid with a drain wire.
The drain wire is a non-insulated wire that is in contact with parts of the cable, usually
the shield. It is used to terminate the shield and as a grounding connection.
• 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. 24 or 26 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 that the crimp terminals
are firmly attached to the wire ends and that the wires are firmly connected to their
connectors.