IBM Series 1 User Manual page 94

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Refer to Figures 2-30 and 2-31 while reading the following
description. The card sockets in a board are designated
alphabetically from A (excluding I and 0) starting at the
left side of the board, viewed from the card side. Pin rows
on the top socket of a card slot are designated
B
on the
left and D on the right. The pins on the second socket are
designated
G
on the left and
J
on the right. The pins on
the third socket are designated
M
on the left and
P
on the
right. The pins on the bottom socket are designated S on
the left and U on the right. Each rov of pins is numbered 2
through 13, top to bottom. Note that the contact
assignments on the card are shown as viewed when facing the
end of the card.
The center-to-center distance between card slots is
15.88
mill
(0.625 in). The dimensions of a standard IBK card
are 178 mm (7
in) by 229 mm
(9 in). The clearance
OD
the
wiring side is 5.6
mm
(0.220 in) measured from the center of
the card stock, and clearance on the component side is
10
mm
(0.380 in) measured from the center of the card stock.
The maximum current that a device may draw on any board
pin is
3
amps. Additionally, the. maximum wattage per slot
is
19
watts total. Care must be taken to ensure that the
power requirements for a new device are compared with the
total pover requirements for the particular system
configuration. This will ensure that the total pover
consumption remains below the maximum ratings for the power
supply.
I/O channel cables are
1.83 m (6
tt) lengths.
cables with IBM connectors.
ground pins. These are
connection to pin 003.
available in 0.61
m
(2 tt) or
They are 20-signal, unshielded
Each connector contains three
008, B06 and Bll. There
is
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Processor I/O Channel 2-79