IBM Series 1 User Manual page 102

c
c
o
Top card connector pins
W26, ill.
126.
X31,
126, 131,
Z26, and
Z31
are grounds to receive the special grounds in
the
I/O
channel cables. Pins
WOB,
108,
YOB,
and
Z08
are
also grounded pins, corresponding to the normal grounds
supplied on an I/O socket. There is no connection to pins
W03, X03, Y03,
and
Z03.
These pins correspond to the normal
+5 volts dc pins on an I/O socket (D03, J03. P03, and U03).
The socket adapter feature provides a method for a customer
to plug into the I/O channel on an I/O socket. The channel
socket adapter is a two component system assembled to
translate the
1
mm
(O.040
in)
18K
card stock and pin
configuration to a
1.5
mm
(0.060
in) industry connector (see
Figure
2-34).
The first component is a
64
mm
(2.53 in)
high
IBM socket card (paddle card) with gold-plated
printed-circuit tabs on the opposite end.
The second component is a modified 72-pin Continental*
double billows feed-through connector to allow customer
access to 72 pins of the I/O channel. No logic electronics
is provided on
the
channel socket adapter; it is only a
translator/connector.
This assembly is plugged into any of the processor I/O
sockets. The customer then plugs his 1.5 mm (0.060 in)
printed circuit tabs terminal logic card into this billows.
Dimensions for
a
customer card, designed to use the socket
adapter feature, are shown in Figure 2-35. The connector to
which the customer interfaces is the 600 series Continental
72-pin connector. This connector has IBM part number
1637646.
The maximum amount of current a device card may
draw when using the socket adapter feature is 2 amps at +5
volts.
The signal lines available from the socket adapter are
the same as for a standard I/O channel but with only four
request in bus lines, corresponding to levels 0-3. There is
+5
volts dc available on the 002 pin. Figure 2-36 contains
the translation from the IBM pin assignment to the customer
card socket (Continental connector) pin assignment.
*Manufactured
by
Continental connector Corporation.
Processor I/O Channel 2-87