What to watch out for
The vendor should bring up any issues that are missing from the chassis specification. But the vendor does not know the system requirements. So all the requirements need to be spelled out in the requirements.
1. No EMI protection; Openings in the chassis walls, un-shielded wires within the chassis, no fan grills
2. Power Supply to small to drive all card slots. Size the power supply so that the supply can drive all available or usable card slots. Size the power supply so that it output the required current at the maximum temperature after it has been derated.
3. Not enough air flow inside the chassis. Insure that there is sufficient air flow within the chassis, and that the air flows over the components that require cooling.
4. Missing warning stickers: ESD Labels, Two man lift, High Voltage warning. [Warning Signs]
5. Running spare wires.
6. Wire color coding for internal cables.
7. The minimum required wire gauge.
8. Any vibration requirements that require cable attachments.
9. Connectors no longer working well.
Connector Savers - Although most electrical connectors are considered to be durable, each of them has a finite life.
During testing and system checkout, certain connectors may be subject to frequent mating and
demating. When this situation exists, wear and potential damage can be reduced by the use of
”connector-savers".
Connector-savers transfer the wear from the 'finished' connector to the
jumper harness connectors. It also prevents uncontrolled (and possibly damaged) test equipment
connectors from mating directly with the cable or harness assembly connectors.
The use of connector savers is recommended. A connector saver can be a short harness
jumper that has a mating interface connector to engage the unit. The other end of the harness has
the same interface as the unit.
10. Equipment power switches should be selected and located so that accidental contact by personnel will not operate the switch.
These are just a few of the possible issues that may arise while designing an Electronic Chassis. Each of these potential issues are covered on the page that covers the topic in greater detail. Use the Index page to see the contents in this section.
Index Page; How To Specify a Equipment Chassis
