ElmoMC Gold Line Digital Servo Drives-Gold Bell User Manual
Page 35
Gold Bell Installation Guide
Installation
MAN-G-BELIG (Ver. 1.004)
35
The returns above are all shorted within the Gold Bell in a topology that results in optimum
performance.
Caution:
Follow these instructions to ensure safe and proper implementation. Failure to
meet any of the below-mentioned requirements can result in drive, controller or
host failure.
1.
When wiring the traces of the above functions, on the Integration Board, the Returns of
each function must be wired separately to its designated terminal on the Gold Bell. DO
NOT USE A COMMON GROUND PLANE. Shorting the commons on the Integration Board
may cause performance degradation (ground loops, etc.).
2.
Inputs: The six digital inputs are optically isolated from the other parts of the Gold Bell. All
six inputs share one return line, INRET. To retain isolation, the Input Return pin and all
other conductors on the input circuit must be laid out separately.
3.
STO: The two digital STO inputs are optically isolated from the other parts of the Gold Bell.
All six inputs share one return line, INRET. To retain isolation, the Input Return pin and all
other conductors on the input circuit must be laid out separately
4.
Outputs: The two digital outputs are optically isolated from the other parts of the Gold
Bell. To retain isolation, all the output circuit conductors must be laid out separately.
5.
Return Traces: The return traces should be as large as possible, but without shorting each
other, and with minimal cross-overs.
6.
Main Power Supply and Motor Traces: The power traces must be kept as far away as
possible from the feedback, control and communication traces.
7.
PE Terminal: The PE (Protective Earth) terminal is connected directly to the Gold Bell’s
heat-sink which serves as an EMI common plane. The PE terminal should be connected to
the system's Protective Earth. Any other metallic parts (such as the chassis) of the assembly
should be connected to the Protective Earth as well.
8.
Under normal operating conditions, the PE trace carries no current. The only time these
traces carry current is under abnormal conditions (such as when the device has become a
potential shock or fire hazard while conducting external EMI interferences directly to
ground). When connected properly the PE trace prevents these hazards from affecting the
drive.