User manual

VB8004
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VB8004 User Man
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ual
36
3.2. COM Voltage Select Jumpers
The voltage select jumpers are set to determine the input voltage of COM
connectors. Each COM connector (available through the onboard COM pin
headers) can support both +5V and +12V.
3.2.1. J1: Voltage Select Jumper
The voltage for external COM port (“labeled “CN2A”) at the back panel is
controlled by the jumper labeled as “J1”.
Figure
Figure Figure
Figure 33
3333
33:
: :
: V
VV
Voltage select jumper
oltage select jumperoltage select jumper
oltage select jumper (J1) for
(J1) for (J1) for
(J1) for COM
COMCOM
COM port
port port
port
Setting
SettingSetting
Setting Pin 1
Pin 1Pin 1
Pin 1 Pin 2
Pin 2Pin 2
Pin 2 Pin 3
Pin 3Pin 3
Pin 3 Pin 4
Pin 4Pin 4
Pin 4 Pin 5
Pin 5Pin 5
Pin 5 Pin 6
Pin 6Pin 6
Pin 6
RI (default) On On Off Off Off Off
+5V Off Off On On Off Off
+12V Off Off Off Off On On
Table
Table Table
Table 23
2323
23:
::
: Voltage select jumper settings (J1)
Voltage select jumper settings (J1)Voltage select jumper settings (J1)
Voltage select jumper settings (J1)