Apple serial NB card

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connector wiring scheme

Pin Signal Description Direction 
1 +CA1F X.21 control, +CHA1, output 
2 232TXDA1 Transmit data, CHA1, RS-232, output 
3 -CA1F X.21 control, -CHA1, output 
4 1RTSA Ready To Send, CHA1, RS-232, output 
5 1CTSA Clear To Send, CHA1, RS-232, input 
6 +CB1F X.21 control, +CHB1, output 
7 232TXDB1 Transmit data, CHB1, RS-232, output 
8 -CB1F X.21 control, -CHB1, output 
9 1RTSB Ready To Send, CHB1, RS-232, output 
10 1CTSB Clear To Send, CHB1, RS-232, input 
11 +1B1 X.21 indication, +CHB1, input 
12 232TXDA2 Transmit data, CHA2, RS-232, output 
13 2RXDA Receive data, CHA2, RS-232, input 
14 2RTSA Ready To Send, CHA2, RS-232, output 
15 2CTSA Clear To Send, CHA2, RS-232, input 
16 +IA1 X.21 indication, +CHA1, input 
17 232TXDB2 Transmit data, CHB2, RS-232, output 
18 2RXDB Receive data, CHB2, RS-232, input 
19 2RTSB Ready To Send, CHB2, RS-232, output 
20 2CTSB Clear To Send, CHB2, RS-232, input 
21 +422TXCA1 +Transmit clock, CHA1, RS-422, input 
22 -422TXCA1 -Transmit clock, CHA1, RS-422, input 
23 +422RXDA1 +Receive data, CHA1, RS-422, input 
24 -422RXDA1 -Receive data, CHA1, RS-422, input 
25 +422RXCA1 +Receive clock, CHA1, RS-422, input 
26 -422RXCA1 -Receive clock, CHA1, RS-422, input 
27 +422TXDA1 +Transmit data, CHA1, RS-422, output 
28 -422TXDA1 -Transmit data, CHA1, RS-422, output 
Ports and Pinouts Apple Serial NB Card - 36 
29 +422TXCB1 +Transmit clock, CHB1, RS-422, input 
30 -422TXCB1 -Transmit clock, CHB1, RS-422, input 
31 +422RXDB1 +Receive data, CHB1, RS-422, input 
32 -422RXDB1 -Receive data, CHB1, RS-422, input 
33 +422RXCB1 +Receive clock, CHB1, RS-422, input 
34 -422RXCB1 -Receive clock, CHB1, RS-422, input 
35 +422TXDB1 +Transmit data, CHB1, RS-422, output 
36 -422TXDB1 -Transmit data, CHB1, RS-422, output 
37 GND_6 Extra ground 
38 2TXCA Transmit clock, CHA2, RS-232, input 
39 2RXCA Receive clock, CHA2, RS-232, input 
40 2RXCB Receive clock, CHB2, RS-232, input 
41 GND_5 Extra ground 
42 2TXCB Transmit clock, CHB2, RS-232, input 
43 1DSRA Data Set Ready, CHA1, RS-232, input 
44 1DCDA/-IA1 Data Carrier Detect, RS-232/X.21 
indication, -CHA1, input 
45 1DTRA Data Terminal Ready, CHA1, RS-232, output 
46 1RIA Ring Indicator, CHA1, RS-232, input 
47 GND_4 CHB2 ground 
48 1DSRB Data Set Ready, CHB1, RS-232, input 
49 1DCDB/-IB1 Data Carrier Detect, RS-232/X.21 
indication, -CHB1, input 
50 1DTRB Data Terminal Ready, CHB1, RS-232, output 
51 1RIB Ring Indicator, CHB1, RS-232, input 
52 GND_3 CHA2 ground 
53 2DSRA Data Set Ready, CHA2, RS-232, input 
54 2DCDA Data Carrier Detect, CHA2, RS-232, input 
55 2DTRA Data Terminal Ready, CHA2, RS-232, output 
56 2RIA Ring Indicator, CHA2, RS-232, input 
57 GND_2 CHB1 ground 
Pin Signal Name Signal Description 
Ports and Pinouts Apple Serial NB Card - 37 
58 2DSRB Data Set Ready, CHB2, RS-232, input 
59 2DCDB Data Carrier Detect, CHB2, RS-232, input 
60 2DTRB Data Terminal Ready, CHB2, RS-232, output 
61 2RIB Ring Indicator, CHB2, RS-232, input 
62 GND_1 CHA1 ground 



Category:Computer Peripheral Connectors


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