Second-Generation Channel Interface Processor (CIP2) Installation and Configuration 33
CIP2 Hardware Installation
The function of the ejector levers (see Figure 18) is to align and seat the card connectors in the
backplane. Failure to use the ejector levers and insert the interface processor properly can disrupt the
order in which the pins make contact with the backplane.
Following are examples of incorrect insertion practices and their results:
• Using the handle to force the interface processor all the way into the slot can pop the ejector
levers out of their springs. If you then try to use the ejector levers to seat the interface processor,
the first layer of pins (which are already mated to the backplane) can disconnect and then remate
with the backplane, which the system interprets as a card failure.
• Using the handle to force or slam the interface processor all the way into the slot can also damage
the pins on the card connectors if they are not aligned properly with the backplane.
• When using the handle (rather than the ejector levers) to seat the interface processor in the
backplane, you may need to pull the interface processor back out and push it in again to align it
properly. Even if the connector pins are not damaged, the pins mating with and disconnecting
from the backplane will cause the system to interpret a card failure. Using the ejector levers
ensures that the card connector mates with the backplane in one continuous movement.
• Using only the handle to seat or remove an interface processor, or failing to push the ejector
levers flat against the CIP2 faceplate, can leave some (not all) of the connector pins mated to the
backplane, a state that will halt the system.
Using the ejector levers and making sure that they are pushed fully into position ensures that all three
layers of pins are mated with (or free from) the backplane.
It is also important to use the ejector levers when you remove an interface processor to ensure that
the card connector pins disconnect from the backplane in the logical sequence expected by the
system. Any processor module that is only partially connected to the backplane can halt the bus.
In the following procedures, two channel-related terms are used: vary offline refers to disabling an
interface; vary online refers to enabling an interface. For instructions on how to vary the host channel
or addresses online or offline, refer to the documentation for your mainframe operating system.
Refer to Figure 18 while performing the following steps to remove a CIP2 or interface processor
filler. If you are removing an interface processor filler, proceed to Step 5. If you are replacing an
existing CIP2, begin at Step 1.
Follow these steps to remove a CIP2 or an interface processor filler:
Step 1 Vary offline the addresses assigned to the PCA or ECA. For instructions on how to vary
offline, refer to the documentation for your mainframe operating system.
Step 2 Use the shutdown interface command to shut down the appropriate interfaces.
Step 3 On the PCA connector, place the select/bypass switch in bypass mode. (See Figure 15 on
page 28.)
Step 4 Disconnect the interface cables from the CIP2 interface ports.
Step 5 Use a screwdriver to loosen both the captive installation screws on the CIP2 or interface
processor filler. (See Figure 18a.)
Step 6 Place your thumbs on the ends of each of the ejector levers and simultaneously pull them
both outward, away from the interface port (in the opposite direction from that shown in
Figure 18c) to release the carrier from the slot. If you are removing a CIP2, this also
releases the CIP2 bus connector from the backplane.
Step 7 Grasp the handle with one hand and pull the CIP2 or interface processor filler straight out
of the slot, keeping your other hand under the carrier to guide it. (See Figure 17.) Keep
the carrier parallel to the backplane. Avoid touching the card or any connector pins.
