ElmoMC SimplIQ Digital Servo Drives-Whi-Trio Installation Guide - Manual (Page 16)

.7 Connecting the Cables
.7.1 Wiring the Trio
Once the Trio 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 Trio.
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 26 or 28 AWG wire for control and
feedback cables is satisfactory although 26 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.
The following connectors are used for wiring the Trio:
Type Function Connector Location
Main Power
PE, AC2, AC1,
VP+, PR, PR, VL
Motor Power
PE, M3, M2, M1
Table 3-1: Connectors on the “Bottom” of the Trio
Main Power Motor Power