IBM 3274 51C Maintenance Information page 104

CCA (with clock)
Card H2
, . - - - -
-Req to Send
S10
-Data Rate Sel
S02
-Sel Standby
U09
-Test
S05
-Data Set Rdy (Note 2)
S13
...
:
-Clear to Send
-
.
.,
-carrier Det
~:J.l
:
U05
-
Ring Ind
U04
Xmit Data
U13
Rcv Data
-Data Term Rdy (Note 1)
U12
1200
BPS 1M
Card G2
J05
- p
'002 G02
... B04 J13
~
B03 G09
.. B05
B13 DOS
013
006 ~
B12 J08
012
Gl0
~
G13
G03
004 J02
..
810 J09
po
B02
Gll
Note 3
\
t ,
J.
- p
Board
Conn V1
C1B13
C1Al1
C1E13
A1E13
Bl E13
B1D13
81 Ell
B1Bl1
A1Dll
C1Bll
C1Ell
C1Dl1
- 81All
Cable
Pin
Bl0
009
B13
B03
B05
B07
008
DOS
002
010
013
012
004
Nonswitched - Xmit
Nonswitched + Xmit
~ Nonswitched + Rcv
~
Nonswitched - Rcv
Data Tip
~
L.
I
Data Ring
-
. ..
.
~
Current Detect #1
Current Detect
#2
-
Transfer Relay
L...
Data Indicate
-3.5V
+B.5V
3274
Internal Cable
1/0
Conn
11
r
PN 5267855 N·Sw only
PN 5267856 Sw/N·Sw SNBU
"
.
I
,
I
I
"
I
I
,
I
.-
Line Plata (WIT)
»
A08
Telephone Set 2
...
TB1.o
.-
2
Telephone Set 1
...
Tel·7
' "
'>
B08
TBl-8
Telephone Line 2 4
'"
~> BOl TBl-9
Telephone Line 1
"
5
.-
»
A02
~GND
T8·5
(Not Used)
»
805
~> A04
">
807
~> B03
------,
I
_----U
n
=-
~
'S.
(1)
...
VI
/
/
/
/
Line
Active
Inactive
Open
DC Voltage
OV
+5V
+1.5V
Use DOB for ground reference.
DC Voltage
Range
Oto +OAV
+2.4 to +5.5V
+1 to +2V
I
/
/
/
Notes:
---
C;I~
(
From Control Unit
1/0
Connector
1 2 3 4 5 6 7 8 9 101112 13
0 • • • • 0 0 0 • • • • 0
0 0 0 0 0 0 0 0 0 0 0 0
141516171819202122232425
~ j
25 Pin Connector (Male)
Q
1. This line is connected to the TALK/DATA switch
§
when Switched Network or SNBU is used. See
c:
Figure 0-10 for switch connections.
::s
n'
2. This line is connected to Call In Progress indicator
;. (see Figure 0·10).
o
~
3. Jumpered for two· wire nonswitched operation.
~
4. For World Trade connectors, see Figure 5·11.
e;>
- --
g
Figure 5-4 (part 2 of 2). 3274 Communications Line Flow, 1200-bps Integrated Modem - U.S. and Canada; World Trade Countries
t')
(1)
o
~
r!
VI
.!.J
/-,
Note4