Intergraph StudioZ GT RAX System Reference Manual page 81

J16 and J17 provide power (+12V, +5V, Ground) to the backplane. Both connectors must be used
for proper operation.
J20 and J21 are auxiliary bus connectors used in multiple backplane configurations only. J9 is
used only in multiple backplane configurations and should not be installed.
U7-9 are the LVD SCSI termination circuits. These provide the bus termination necessary for
proper operation.
Disk Drive Bay Backplane Connections
From the Backplane
J1, J2,.J3, J4
J5, J6, J7, J8, J9, J10, J11
J14, J15
J16, J17
J18
J20, J21
U7-9
J16, J17 - Power Connector Pinout
Pin Signal Wire Color
1 +12V Yellow
2 Ground Black
CH0 and CH1 - Disk Data Cable Pinout
Pin Signal
1-16 Ground
17 Term Power
18 Term Power
19 No Connect
20-34 Ground
35 SCSI Data Bit 12
36 SCSI Data Bit 13
37 SCSI Data Bit 14
38 SCSI Data Bit 15
39 SCSI Data Parity 1
40 SCSI Data Bit 0
To
SCSI drive connectors
Reserved
LVDS SCSI controller
Power supply cables P6 and P9 (+12V, +5V, Ground)
Optional SAF-TE card
Auxiliary bus
LVDS SCSI termination
Pin Signal
3 Ground
4 VCC, +5v
Pin Signal
43 SCSI Data Bit 3
44 SCSI Data Bit 4
45 SCSI Data Bit 5
46 SCSI Data Bit 6
47 SCSI Data Bit 7
48 SCSI Data Parity 0
49 SWAP (Ground)
50 Shell OK (Ground)
51 Term Power
52 Term Power
53 No Connect
Wire Color
Black
Red
Pin Signal
56 Fault Data
57 Busy
58 Acknowledge
59 Reset
60 Message
61 Select
62 Carrier Detect
63 Request
64 I/O
65 SCSI Data Bit 8
66 SCSI Data Bit 9
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