ElmoMC SimplIQ Digital Servo Drives-Cello Installation Guide - Manual (Page 19)

Cello Installation Guide Installation
MAN-CELIG (Ver. 1.602)
www.elmomc.com
19
3.4 Connecting the Cables
The Cello has ten connectors.
3.4.1 Wiring the Cello
Once the Cello 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 Cello.
Caution:
Follow these instructions to ensure safe and proper wiring:
 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 should contain 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. A 24, 26 or 28
AWG wire for control and feedback cables is satisfactory although 24 AWG is
recommended.
 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.