Connecting Mo Disk Drives Or Hard Disks To The Scsi - YOKOGAWA DL7440 User Manual

12.3 Connecting MO Disk Drives or Hard Disks to
the SCSI
SCSI Specifications
Items Necessary for Connection
Cable
Connection Procedure
SCSI Devices That Can Be Connected
IM 701450-01E
Item
Interface standard
Connector type
Connector pin assignment
25 23 24
50 49 48 28
Pin No. Signal Name
1 to 12 GND
13 NC
14 to 25 GND
26 -DB0
27 -DB1
28 -DB2
29 -DB3
30 -DB4
31 -DB5
32 -DB6
33 -DB7
34 -DBP
35 to 37 GND
Use a commercially sold cable that is three meters or less in length, has a ferrite core on
each end of the cable, and has a characteristic impedance between 90 and 132 Ω.
1. Connect the SCSI cable to the SCSI connector on the rear panel of the DL7400.
2. Turn ON the SCSI device and the DL7400 (in that order). To format a disk,
follow the procedures given in section 12.6.
Most SCSI devices (MO disk drive or hard disk) can be connected to the instrument, but
there are some exceptions. For details on which devices can be connected, contact your
nearest YOKOGAWA dealer as listed on the back cover of this manual. For general
handling precautions for the connected SCSI device, see the instruction manual that is
provided with the device.
Note
• When connecting multiple SCSI devices in a chain, attach a SCSI terminator to the device
at the other end of the chain.
• Hard disks that are formatted with the DL7400 cannot be read using the NEC PC-9800
Series computers.
Specifications
SCSI (Small Computer System Interface), ANSI X3.131-1986
Half pitch 50 pins (pin type)
Unbalanced (single-ended), see table below.
3 2 1
Pin No.
27 26
Pin No. Signal Name
38 TERMPWR
39, 40 GND
41 -ATN
42 GND
43 -BSY
44 -ACK
45 -RST
46 -MSG
47 -SEL
48 -C/D
49 -REQ
50 -I/O
12
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