ElmoMC SimplIQ Analog Servo Amplifiers-Ocarina Evaluation Board User Guide - Manual (Page 29)

A.8 Guidelines for Making Your Own Cables
If you do not plan to use cables provided
by Elmo, follow the instructions below carefully.
Proper wiring, grounding and shielding are essential for ensuring safe, immune and optimal
servo performance of the Ocarina Evaluation Board.
Follow these instructions to ensure safe and proper wiring:
ƒ Use twisted pair shielded cables for control, feedback and communication connections.
For best results, the cable should have an aluminum foil shield covered by copper braid,
and sh
e,
er
ire for control and
at the
tween the wires is not too high: C < 30 nF is satisfactory for most
far away as possible from the feedback, control and
rrent.
ng the
g, carefully inspect all wires to ensure tightness, good solder
joints and general safety.
Ocarina Evaluation Board User Guide Cables
MAN-EVLBRD-OCA (Ver. 2.1)
ould contain a drain wire.
The drain wire is a non-insulated wire that is in contact with parts of the cabl
A-7
usually the shield. It is used to terminate the shield and as a grounding connection.
ƒ The impedance of the wire must be as low as possible. The size of the wire must be thick
than actually required by the carrying current. A 24, 26 or 28 AWG w
feedback cables is satisfactory although 24 AWG is recommended.
ƒ Use shielded wires for motor connections as well. If the wires are long, ensure th
capacitance be
applications.
ƒ Keep all wires and cables as short as possible.
ƒ Keep the motor wires as
communication cables.
ƒ Ensure that in normal operating conditions, the shielded wires and drain carry no cu
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 affecti
drive. Failing to meet this requirement can result in drive/controller/host failure.
ƒ After completing the wirin