Diagram and user-selectable options (on NP models only)
Below is a diagram of the main board of SCSI disk drives and also a summary of the user-selectable options including guidelines for
installation of the drives.
This setting applies only for NP model drives.
Pin 1
CN2
Pin 2
Pin 23
Pin 24
Figure 1. Option select terminal
Table 2. CN2 Terminal Setting (on NP models only)
Pin #
Setting Item
Function
1-2
SCSI ID 0
See Table 3.
3-4
SCSI ID 1
5-6
SCSI ID 2
7-8
SCSI ID 3
9-10
Write protect
Open
……
Write operation is enabled.
(default)
Short
……
Write operation is disabled.
11-12
Motor start mode
Open
……
Starting of motor is controlled with START/STOP
UNIT command.
Short
……
Motor is started immediately after power supply is
turned on or microcode is downloaded.
(default)
13-14
Force Narrow
Open
……
16-bit bus mode
(default)
Short
……
Pull upper 8bits and parity internally when drive is
connected to Narrow SCSI bus.
15-16
Force Single Ended
Open
……
Follows DIFFSNS signal level on SCSI bus.
(default)
Short
……
Single-Ended mode
17
GND
18, 19
N.C
20
IDD Reset
Input signal
21-22
Remote LED
Output signal
23-24
Terminal power supply
Open
……
Drive does not supply terminator power to SCSI bus.
Short
……
Drive supplies terminator power to SCSI bus.
(default)
Table 3. SCSI ID Setting on CN2 (on NP models only)
Pin 1-2
Pin 3-4
Pin 5-6
Pin 7-8
ID
Pin 1-2
Pin 3-4
Pin 5-6
Pin 7-8
ID
Open
Open
Open
Open
0
Open
Open
Open
Short
8
Short
Open
Open
Open
1
Short
Open
Open
Short
9
Open
Short
Open
Open
2
Open
Short
Open
Short
10
Short
Short
Open
Open
3
Short
Short
Open
Short
11
Open
Open
Short
Open
4
Open
Open
Short
Short
12
Short
Open
Short
Open
5
Short
Open
Short
Short
13
Open
Short
Short
Open
6
Open
Short
Short
Short
14
Short
Short
Short
Open
7
Short
Short
Short
Short
15
(default)
