IBM 3274 51C Maintenance Information page 103

VI
a. CCA (with clock) 1200 BPS 1M
Card G2
Board
Conn Y1
Card H2
I
-Req to Send
S10
-Data Rate Sel
S02
-Sel Standby
U09
-Test
S05
JOSm
~D02
G02 C1B13
B04
J13 C1A11
B03
G09 C1E13
B05
A1E13
S13
Note 2
-Data Set
Rdv
INnt ..
31
14 I
B13 005
MIII41------l B1E13
S12
-Clear to Send Nntp. 2
14 1
013 006
/III14.....--.-;..-~ B1C11
-Carripr npt
504
B1B11
14 1
B12 G10
14~---~
U05
I-
Rina Ind
14 1
012 J09l ..
4---.....,
C1D11
C1B11
~I
A1D11
J
C1E11
G03
I ~I
G 13
II1II141--------1
Xmit Data
~ 004
J02
U04
U13
14
Rcv Data
I
BlO
J08 1111114f----~ B1E11
I
I
I
I
1
I
I
1
I
I
I
I
I
I
I
I
Cable
Pin
B10
009
B13
B03
006
BOO
005
012
010
002
013
3274 TP Line Conn
1/0 Conn
Plug 283 B
-
- - - - - - - - - -
- -
I
Note
5
10
Nonswitched - Xmit
) White
INote 5
9 Nonswitched + Xmit
)
Red
I Note
5
11
Nonswitched + Rev
) Yel
I
Note
5
12 Nonswitched - Rev
) Blk -7
row
:.
("'W"
I
I
\
~
,
...
, Data Tip - T (White)
~
I
I::::j~
DT
2
I Data Tip - R (Black)
t:::lc::::::
DR
4
I Switch Hook (Red)
t::::lc::::::
-,
SH
-7
20
I
Coupler Cut.through (Brown)
CCT
~-7
I
Off Hook
(Blue)
OH
22
I Ring Indicate
(Violet)
R
/
I
1:
6
I
Data Modem Ready
(Yellow)
OA
I Signal Ground (Gray)
SG
U12
-Data Term Rdy (Note 1)
1
~
B02
l . . . . . -
l:[J
I
I
LJ L..J
\~'
".
-
L. _ _ _ _ _ _ _ _ _ _ ..,
\ . Red
Label.Nonswitched
~
C'\
Y
Yello'"
/
I
I
/
Line
Active
Inactive
Open
DC Voltage
OV
+5V
+1.5V
Use 008 for ground reference.
DC Voltage
Range
o
to +O.4V
+2.4 to +5.5V
+1 to +2V
PN 5267855
/
/
I
, :' 0
Q)
0
II
Xmit
~1~.:-i0''';'
Black
Y
White
Notes:
1/0 Connector
1 2 3 4 5 6 7 8 9 10111213
0 • • • • • • 0 • • • • 0
0 0 0 0 0 0 . 0 . 0 0 0
141516171819202122232425
, I
25·Pin Connector (Male)
1. This line is connected to the TALK/DATA switch
when Switched Network or SNBU is used. See
Figure
0·10
for switch connections.
Label
I
I
I
I
I
I
DA OH DT
~
@ @ @ @
SH @SG @CCT@
R1@DR~
' "
/
Telephone Company·Provided
CBS Data Coupler or
FCC-Certified Equivalent
-
--,
I
I
I
I
I
I
2. Data TIP lines go to transmit level switches. See
Figure D·1 0 for switch connections.
3. This line is connected to the Call In Progress
indicator (see Figure
0-10).
_____
~~~~~~
_______ J
4. Jumpered for two·wire, nonswitched operation.
5. Varistor is installed from pins 9, 10, 11, and
12 to ground.
Figure 5-4 (part 1 of 2). 3274 Communications Line Flow, 1200-bps Integrated Modem - U.S. and Canada; World Trade Countries
['