Gold Twitter Installation Guide
MAN-G-TWI (Ver. 2.000)
|Power Returns (PR)|
www.elmomc.com
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Table of Contents
Chapter 8:
Integrating the Gold Tw itter on a PCB
The Gold Twitter is designed to be mounted on a PCB by soldering its pins directly to the PCB.
Refer to Chapter 5 in the MAN-G-Board Level Modules Hardware Manual for further information.
8.1.
Power Returns (PR)
In the Gold Twitter, the power stage and control stage are internally connected, and the negative
node of the DC power bus is designates as PR
The maximum realistic Power Return is achieved using a plane, which connects between the Gold
Drive and the power source. The impedance on this plane must be as low as possible to reduce
the impedance between the “Grounds”. This effectively reduces the levels of common mode
differences, interferences, EMI etc.
8.2.
COMRET
For details of the COMRET, refer to the section 5.4 in the MAN-G-Board Level Modules Hardware
Manual.
8.3.
Earth Connection (PE)
The PE (Earth connection) terminal is connected internally in the drive to the Gold Twitter’s
chassis (heat-sink) which serves as an EMI common plane. Any other assembly metallic parts (such
as the chassis) should also be connected to the PE.
Under normal operating conditions, the PE trace carries no current. The only time these traces
carry current is under unusual 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.
