Technical Specifications
C-8 AlphaStation 500 Series User Information
Table C-9 Narrow SCSI Pinouts (Continued)
Signal Name
Connect
or
Contact
Number
Cable
Conductor
Number
Connector
Contact
Number
Signal Name
GROUND
15
15
16
16
-DB(7)
GROUND
17
17
18
18
-DB(P)
GROUND
19
19
20
20
GROUND
GROUND
21
21
22
22
GROUND
OPEN
23
23
24
24
OPEN
OPEN
25
25
26
26
TERMPWR
RESERVED
27
27
28
28
RESERVED
GROUND
29
29
30
30
GROUND
GROUND
31
31
32
32
-ATN
GROUND
33
33
34
34
GROUND
GROUND
35
35
36
36
-BSY
GROUND
37
37
38
38
-ACK
GROUND
39
39
40
40
-RST
GROUND
41
41
42
42
-MSG
GROUND
43
43
44
44
-SEL
GROUND
45
45
46
46
-C/D
GROUND
47
47
48
48
-REQ
GROUND
49
49
50
50
-I/O
Expansion Slots
The system board contains one 64-bit PCI (full length), three 32-bit PCI (one full length,
two half length). The maximum ava5V DC allowable to any expansion slot
depends on the following parameters:
•
Power supply capacity
•
The +5V DC requirements of the system board
•
The +5V DC requirements of the peripherals
•
The power demands of all other slots in use and of the system board
