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ENT"
I ..
T ,
IXIT.
S CONS 1-....
----01:.
T06AQ
rto,
~l'"
- -....
--15 CONS
~
lEiI
~SJ:
ENTb
5 CCJNS
"""'5]H1
1c-M
411.
III
I
88 22,-2 _ _ ---,
EX i T '
I
E
NT!! •
I
i
IrOM
!
Signol
Moch ,
Nome
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LIA AeJ
IA
A8
Figure
54.
Entry and Exit Blocks
Service-Voltage Logic Blocks: The four-character
mnemonic code (SERV) identifies one type of the
pseudo block. An asterisk
(*)
in the first char-
acter of line
1
indicates that the inputs are in
particular positions; the asterisk
(*)
in the last
character of line
1
indicates that the block is
special.
Line
3
ider.tifies the voltage.
Line
5
locates the card socket.
The logic block pin num-
bers identify which pins are wired for the parti-
cular voltage.
~8
A SERV logic block (Figure
55)
indicates that
a voltage is wired into a connector area by printed
wiring.
NOTE: No voltages are present in each outside column (A and N)
of card sockets on the board.
Normally the sockets in columns A and N of the
board are used for cable connectors. When these
sockets are used for cards, service voltages are
brought to these sockets by printed wiring. This
arrangement is shown with the SERV special block
(FIgure 55).
When a half cable connector plugs
into columns A or N on the printed board, addi-
tional ground wires are shown on the ALD's in the
lower
half
of the socket. A board is not normally
wired this way. Normally, on a given board all
blocks
that
are used for service voltages appear
on the same ALD page(s).
SERV
f::
GNO
109
~-B1A2
"lA
AB
[ V: : : · ::=:::[V::T'
l
A-81M4
BII---911
A-A1N4
6N
AC
7N
AD
Cable Logic Blocks:
1'\\0 lo~ic:
blocks (Figure
jl).1
are
used to Jefine each cable: one log-ic block shows
the "from" location; the other logic block shows the
the "to" location.
Line 1 contains C ABL* for
regular cables (both intergate and intragate)
and
XOVR
* for crossover cables.
Basil' data in the block provide cablebl()ck iden··
tification: location
of
the end points, cable assem-
bly part number, location suffix (half cable can be
plugged into top ur bottom section, or left or right
section
of
the connector socket), intergate sequence
numbers. and orientation of intergate cable.
The code used in Figure
56
is:
NNNN
last four numbers of the cable assembly
drawing appear only on the ,·ft·orn" hlock.
The first three numbers
(580)
are under-
stood as relating to the part number.
P
socket porI ion used,
i.
e.,
T
for top,
B
for
bottum,
F (or
blank) for full; this
will appear as a location suffix.
QQQQ
installation sequence number (required
in both blocks
of
the intergate cable).
GGBBSS
j.!;ate, buard, and socket
for
tht.'
r('~pt)l'
live
('nd
of
lh('
eahlt.'.
Z
L
01'
H
ind~,cates
left or nght lor
the
d!-
rectiollthis cable takes
III
lea\'ing th\.'
board speclfied in the "from" block.
(Assume a pOSition facing the card side
of the board. )
Cable blocks will hase "from' and "to" orien-
tations similar to the urientations of the particular
cable assembly reference drawings.
Line 2 may contain an additive card code, but
it is not required.
Installation Sequence: Intergate cables are di-
vided into groups; each group contains all of the
.
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