11.3 Cable Design Guidelines
If you are designing your own cable, use the following cable design guidelines:
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Include effective EMI shielding in the cable design.
Double-shielded twisted-pair cable is a good choice for EMI shielding as the twisted
pairs provide magnetic shielding, an inner shield grounded at the digital recorder
provides good electric field shielding, and a continuous outer shield provides good high
RF shielding.
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Use the DGND for the return currents of the control signals (CTRL/RX and UVW/TX)
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Use the AGND for the return currents of the analog signals (CAL_SIG and MAXIMUM
MASS POSITION).
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Ensure the cable length is sufficient to allow for strain relief.
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Ensure that the peak current requirement of the Trillium Compact does not result in a
voltage drop along the cable which takes the power supply voltage below the minimum
required at the Trillium Compact. See
"Power specifications " on page 70
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Ensure the cable is watertight.
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Check the cable electrically after assembly. In particular, ensure that the individual and
overall shields are not shorted together unless so specified.
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Make sure cables are labelled with correct drawing numbers and revisions.
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Make sure the digital recorder is configured so that the default states of the control
lines put the Trillium Compact in the desired state.
Chapter 11 - Connectors and Cables
16889R10 • 2020-11-12
Page 81
