12 Second-Generation Channel Interface Processor (CIP2) Installation and Configuration
What Is the CIP2
The IBM part number is 12G8058; however, this is subject to change. The VA cable ships with a
terminator; the Cisco model number CAB-PCA-VA includes this terminator. The terminator and VA
cable together have the IBM part number 12G7988; however, this is subject to change.
For the bus and tag cable that attaches between the next control unit and the PCA, the model number
is CAB-PCA-VB, and it is referred to as the VB cable. The male 78-pin connector might be labeled
OUT and is typically black or dark gray. The cable labeled P2 is bus, and the cable labeled P3 is tag.
Looking into the end of the male 78-pin connector (on the VB cable), with the wide part of the
connector D-shell on top, the P2 (bus) cable is on the left, and the P3 (tag) cable is on the right. The
plastic on the ends of the bus and tag connectors might be light gray (as opposed to the black or dark
gray plastic on the VA cable). The IBM part number is 12G7933; however, this is subject to change.
Caution
To prevent potential system problems, do not connect the VB cable directly to the PCA.
You must connect the Y cable to the PCA, then connect the VB cable to the Y cables as appropriate.
Figure 7
PCA Bus and Tag, VA and VB Cables
The Y cable always attaches to the PCA. The VA cable attaches between the male end of the Y cable
and the host. The VB cable attaches between the female end of the Y cable and the next (or new)
control unit. Do not connect the VB cable directly to the PCA. If the PCA is the last control unit,
channel termination is required at the end of the Y cable that points away from the host. (See
Figure 5.) For attachment instructions refer to the section “Attaching the CIP2 to the Channel” on
page 30.
DB-78 connector
Bus
Tag
H2432
Light gray for
CAB-PCA-VA
(female)
Dark gray or black
for CAB-PCA-VB
(male)
Dark gray for
for CAB-PCA-VA;
light gray for
CAB-PCA-VB
(plastic end)
48-pin type-A
connector blocks
