12-2
IM 253710-01E
12.2 Connecting SCSI Devices
SCSI Specifications (Option)
Item
Specifications
Interface standard
SCSI(Small Computer System Interface), ANSI X3.131-1986
Connector type
50-pin half pitch (pin type)
Electrical specifications
Single-ended. See the chart below for pin assignments.
A terminator is built-in.
Pin No.
Signal Name
Pin No.
Signal Name
1
25
26
50
2
27
3
28
24
49
23
48
(Back side)
Pin No.
1 to 12
GND
38
TERMPWR
13
NC
39, 40
GND
14 to 25
GND
41
-ATN
26
-DB0
42
GND
27
-DB1
43
-BSY
28
-DB2
44
-ACK
29
-DB3
45
-RST
30
-DB4
46
-MSG
31
-DB5
47
-SEL
32
-DB6
48
-C/D
33
-DB7
49
-REQ
34
-DBP
50
-I/O
35 to 37
GND
–
–
Necessities when connecting a SCSI device
SCSI cable
Use a commercially sold cable that is 3 m or less in length, that has a ferrite core on
each end of the cable, and that has a characteristic impedance between 90 and 132
Ω
.
Connection Procedure
1.
Connect the SCSI cable to the SCSI connector on the back of the instrument.
2.
Turn ON the SCSI device and this instrument.
To format a medium, follow the steps given in section 12.4, “Formatting the
Disk.”
SCSI devices that can be connected
Most SCSI devices (MO disk drive, hard disk, and ZIP) can be connected to the
instrument, but there are some exceptions. For example, the maximum number of
partitions that can be selected is ten
*1
and each partition cannot exceed 2 GB. If the
total capacity of all partitions exceeds 20 GB
*2
, the hard disk cannot be formatted.
For general handling precautions for the connected SCSI device, see the instruction
manual that is provided with the device.
*1 “5” for products (PZ4000) with firmware version before 2.01.
*2 “10GB” for products (PZ4000) with firmware version before 2.01.
Note
When connecting multiple SCSI devices in a chain, attach a SCSI terminator to the device at
the other end of the chain.