i4000 - Quad M-module carrier for VMEbus | |
User Manual | Version: 1.2 |
3.2.2.P2 CONNECTOR ASSIGNMENTS (I4000/P2 ONLY)
Peripherals can be connected to M-modules in two ways. On the front of the M-module a 25-pole sub-D connector (or mechanically equivalent) can be used to connect cables on the front panel of the VMEbus base board. Alternatively a 24-pole header connector interfaces the I/O signals to the base board where they are connected to the VMEbus P2 connector.
In 32-bit VMEbus systems the backplane for the P2 connector must either be removed for the i4000 slot or an i4000 without the P2 connector must be ordered. In that case the peripherals only can be connected to the M-module up front.
PIN24
Module component
side
PIN2
PIN1
Figure 2
Every M-module has 24 pins of the P2 connector assigned. This way four modules on a base board can use this I/O path.
This division into four pads of the P2 connector enables the so called “module connector” to be plugged into the back of a 96-way shroud, mounted on the “P2-backplane”. On the 96-way connector 3 pins are not used for every module. Several manufacturers produce these “module connectors”, which can be coded and sometimes have latches.
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