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Figure 1 Card rack Continuity Test
Evaluate Device
Use the following procedure to determine
whether the device is a first-generation design or
a second-generation design. A second-generation
device already minimizes the risk of electrical
shock; however, a first-generation device requires
modification to reduce the risk of electrical shock.
1. Place the device, component side down,
on a static-free workstation surface.
2. Compare pins M and N of the card edge
connector. Figure 2 shows a first-
generation device. Figure 3 shows a
second-generation device.
3. If the device is second-generation, the risk
of electrical shock is already minimized.
•
Re-install the device in the card rack,
making sure it is fully seated.
•
Turn on AC power to the card rack.
4. If the device is first-generation, a shock
potential exists. The device requires
modification to reduce the risk of
electrical shock.
When you insert the device into the card rack,
the modification ensures that the device is
grounded (through pin L) before the power
contacts (pins M and N) are connected. When
you remove the device from the card rack, the
device remains grounded until after the power
contacts are disconnected.
Figure 2 First Generation Device
(Modification Required)
Figure 3 Second Generation Device
(Modification not Required)
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