IBM 4500R Hardware Maintenance Manual - Page 74

SCSI connector pin-number assignments

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must set a unique ID for the device. Refer to the information that is provided with the device for instructions to set its SCSI ID. SCSI connector pin-number assignments The following table shows the pin-number assignments for the 68-pin SCSI connectors. 34 1 68 35 Pin 1 +Data 12 2 +Data 13 3 +Data 14 4 +Data 15 5 +Data P1 6 +Data 0 7 +Data1 8 +Data 2 9 +Data 3 10 +Data 4 11 +Data 5 12 +Data 6 13 +Data 7 14 +Data P 15 Ground 16 DIFFSENS 17 Term power 18 Term power 19 Reserved 20 Ground 21 +Attention 22 Ground 23 +Busy 24 +Acknowledge 25 +Reset 26 +Message 27 +Select Signal Pin 35 -Data 12 36 -Data 13 37 -Data 14 38 -Data 15 39 -Data P1 40 -Data 0 41 -Data 1 42 -Data 2 43 -Data 3 44 -Data 4 45 -Data 5 46 -Data 6 47 -Data 7 48 -Data P 49 Ground 50 Ground 51 Term power 52 Term power 53 Reserved 54 Ground 55 -Attention 56 Ground 57 -Busy 58 -Acknowledge 59 -Reset 60 -Message 61 -Select 66 Hardware Maintenance Manual: Netfinity 4500R Type 8656 Signal

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66
Hardware Maintenance Manual: Netfinity 4500R Type 8656
must set a unique ID for the device. Refer to the information that is provided with the
device for instructions to set its SCSI ID.
SCSI connector pin-number assignments
The following table shows the pin-number assignments for the 68-pin SCSI
connectors.
Pin
Signal
Pin
Signal
1
+Data 12
35
-Data 12
2
+Data 13
36
-Data 13
3
+Data 14
37
-Data 14
4
+Data 15
38
-Data 15
5
+Data P1
39
-Data P1
6
+Data 0
40
-Data 0
7
+Data1
41
-Data 1
8
+Data 2
42
-Data 2
9
+Data 3
43
-Data 3
10
+Data 4
44
-Data 4
11
+Data 5
45
-Data 5
12
+Data 6
46
-Data 6
13
+Data 7
47
-Data 7
14
+Data P
48
-Data P
15
Ground
49
Ground
16
DIFFSENS
50
Ground
17
Term power
51
Term power
18
Term power
52
Term power
19
Reserved
53
Reserved
20
Ground
54
Ground
21
+Attention
55
-Attention
22
Ground
56
Ground
23
+Busy
57
-Busy
24
+Acknowledge
58
-Acknowledge
25
+Reset
59
-Reset
26
+Message
60
-Message
27
+Select
61
-Select
34
1
68
35