11-3
11
IM 701830-01E
Saving/Loading the Data/Connecting to the PC
11.3 Connecting a SCSI Device
SCSI Specifications (Optional)
Item
Specification
Interface standard
SCSI (Small Computer System Interface) ANSI X3.131-1986
Connector
Half-pitch 50-pin (pin type)
Connector pin assignments
Single end, refer to the following table for the pin configuration
Contains a terminator.
Pin No.
Pin Signal
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 7
GND
Cable and Terminator
Cable
Use a commercially sold cable that is 3 m or less in length with a ferrite core on each end and a
characteristic impedance of 90 to 132
Ω
.
Connection Procedure
1.
Connect the SCSI cable to the SCSI connector on the instrument rear panel.
2.
Set the external device’s SCSI ID to match the setting made at the instrument.
(For more information, see Section 11.12 below.)
3.
Supply power to the instrument and to the SCSI device.
To format, follow the operating procedure in the next section, “Formatting Disks.”
Turn the terminator ON or OFF as necessary. For information in regards to the terminator,
see 11.12 “Changing the SCSI IDs, Terminator ON/OFF.”
If you are using this instrument by itself (not connected to anything else), turn the
terminator ON.
Support for SCSI devices
The instrument supports most but not all SCSI devices. If you need to know whether you can
use a particular SCSI model, please consult your dealer or any of the Yokogawa affiliates listed
at the back of this manual.
For general information on the operation of the SCSI device, follow the operation manual that
came with the device.
Note
• If you are chaining multiple SCSI devices, please place the terminator on both side the devices.
• Hard disks formatted by the instrument cannot be read by NEC PC series computers.
If the internal hard disk is formatted with the PC, the realtime record function can no longer be used (if
the hard disk is reformatted with the instrument, the realtime record function can again be used).
• The file system of this instrument is FAT16. Therefore, formatting a hard disk that is larger than 2 GB
formats the disk as a 2-GB hard disk.
• This instrument only recognizes the first partition of a medium, if the medium had been partitioned
using another device.
Pin No.
Pin Signal
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
1
25
26
50
2
27
3
28
24
49
23
48
(Left side)
Pin No.
