Kontron CPCI Generic backplane Manual do Utilizador descarregar pdf (Página 20)

General CPCI Backplane

2.2 System Slot Board Clock Skew

This is the clock skew that may be attributed to the onboard routing differences (if any) of all of

the PCI clocks as well as the skew specification for the type of integrated circuit driver used for

clock distribution. The onboard clock routing is designed to complement the propagation

delays of distributing the clock to a backplane and still meet overall system skew require-

ments.

3. Backplane Interfaces

3.1 Line Connection

Both AC and DC power supply to most backplanes are connected by means of 3-pole Mate-

N-Lok connectors marked ”LINE1” and, on some 6U backplanes, “LINE2” on the backplane

reverse side.

Figure 4: Orientation and Pinouts of AC/DC Line Connectors

3.2 Power Supply Connectors

The AC or DC input voltages to the power supply unit and the Vo1...Vo4 output voltages from

the power supply unit to the backplane are connected via a power supply connector comply-

ing with one of the below described specifications.

Attention!

AC/DC power supply units must be installed only with backplanes/sys-

tems connected to an AC power line and DC/DC power supply units

with backplanes/systems connected only to a DC power line.

Failure to comply with this warning will result in damage to your equip-

ment.

Note...

The term ”power supply connector” is used both for the connectors

receiving the backplanes’ power supply and the mating output connec-

tors of the power supply units.

Table 2: Pinouts of AC/DC Line Connector

Pin AC DC

1 N - DC supply

2 L + DC supply

3PEPE

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 28 29

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