Assignments - IBM 2420 7 Manufacturer’s Information Brochure

Magnetic tape unit
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12
7 Control Lines from TC
(Common)
15
--
Shield
Set
Shield
Back-
Shield
Go
Write
ward
30
Write
Shield
Set
Shield
Pulse
Read
45
Rewind
Shield
&
Shield
Rewind
Unload
9 Read Bus Lines
(Common)
85
81
I"
Shield
Read
Shield
Read
JX" lX
Bus 0
Bus P
95
91
K X
Read
Shield
Read
Shield
Bus 2
Bus 1
105
101
:K
X
Read
Read
Shield
Bus 4
Shield
Bus 3
115
111
/K
X
Read
Shield
Read
Shield
Bus 6
Bus 5
121
"k
X
Shield
Read
Bus 7
140
®
134
Gnd
155
9 Response Lines
1
170
®
(Respond tolnitial
Back-
-12v
Selection by TC)
Shield'
ward
Status
185
Mod 3
Shield
Mod 2
Shield
Mod 1
Shield
200
Sel +
Sel +
Tape
Write
Shield
Ld Pt
Shield
Ind off
Shield
Inhibit
Notes: This figure is the pin side of a machine-mounted
"A" connector or the wiring side of a machine-mounted
"B" connector.
CD
Requ ires contact part 598041 .
®
Requires contact part 596224 in connector "A" and
part 598041 in connector
"8".
All other locations
require contact part 5412531 (or 596224 with stuffer).
All contacts in the external
TU/Te
and
TU/TU
cable assembl ies are part 5412531 (or 596224 wi th
stuffer) .
23
Meter
Shield
Out
38
Shield
Spare
~
A
X
X
[>( [>(
[>(
X
Y Ix
/
133
®
+12v
163
Sel +
Shield
Read
Status
193
Sel +
Shield
NFP 1
Figure 8. Signal Connectors: Schematic and Pin Assignments
9 Write Bus Lines
(Common)
I
Shield
Write
Shield
Write
Shield
Write
Bus 1
Bus 0
Blis P
16
Write
Shield
Write
Bus 4
Bus 3
Shield
Write
Bus 2
Shield
131
Shield
Write
Shield
Write
Shield
Write
Bus 7
Bus 6
Bus 5
80
<D
(1)
76
)<~
Select 1 Shield
Select 0 Shield
)<
V 90
<D
<D
<D
86
<D
Shield
Select 3 Shield
Select 2
)<
,1100
<D
<D
CD
96
®
Select 5 Shield
Select 4
Shield
~
)<
110
<D
cD
®
106
®
Spare
Shield
Select 7
Shield
Select 6
Ix
1/120
116
Shield
Spare
Shield
Spare
Shield
. Not
<D
CD
141
Shield
Not
Shield
Ready 1
Ready 0
CD
CD
CD
156
<D
Shield
Not
Shield
Not
Ready 3
Ready 2
Not
CD
CD
Not
<D
171
CD
Ready 5
Shield
Ready 4
Shield
CD
Not
CD
187
CD
Not
G)
Shield
~eady
7
Shield
Ready 6

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