Installation Manual

19
3. Introduction
Figure 15. RS-232 cable
SD Series
Computer
PIN Num.
Signal Description
PIN Num.
Signal Description
1
Not used
1
Not used
2
GND
5
GND
3
RXD
3
TXD
4
TXD
2
RXD
5
Not used
Not used
6
Not used
Not used
Table 13. The connection between SD series and computer
The connection between this SD-series and the computer is as follows：
Figure 16.
The connection between SD series and computer
3-16. Fan Ventilation
The rear panel must keep the distance at least 1 inch from any surrounding items.
3-17. Protections Features
Model
DC Input (VDC)
Over Voltage
Over Voltage
Alarm

Under Voltage
Under Voltage
Alarm
Shut-down
Restart
Shut-down
Restart
12V
16 ± 0.25
15 ± 0.25
15.5 ± 0.25
10 ± 0.25
12.5 ± 0.25
10.5 ± 0.25
24V
32 ± 0.5
30 ± 0.5
31 ± 0.5
20 ± 0.5
25 ± 0.5
21 ± 0.5
48V
64 ± 1
60 ± 1
62 ± 1
40 ± 1
50 ± 1
42 ± 1

OVA only LED prompt, no beeper alarm.
Table 14. Protections Features