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3.4. COM Voltage Select Jumpers
Each of the additional COM ports (available through the onboard COM pin
headers, see page 24) can support both +5V and +12V. COM2 has its own pin
header block. COM3 and COM4 share a single pin header block. COM5 and
COM6 also share a single pin header block.
3.4.1. COM2 Voltage Select Jumper
The voltage for COM2 is controlled by the jumper labeled as “J6”. The
voltage can be 5V or +12V. +5V is the default setting. The jumper
settings are shown below.
Setting Setting Setting Setting Pin 1 Pin 1 Pin 1 Pin 1 Pin 2 Pin 2 Pin 2 Pin 2 Pin 3 Pin 3 Pin 3 Pin 3
+5V (default) On On Off
+12V Off On On
Table
Table Table
Table 25
25 25
25: COM2 voltage select jumper settings
: COM2 voltage select jumper settings : COM2 voltage select jumper settings
: COM2 voltage select jumper settings
Figure
Figure Figure
Figure 31
31 31
31: Voltage select jumpers for COM2
: Voltage select jumpers for COM2 : Voltage select jumpers for COM2
: Voltage select jumpers for COM2 –
– –
– COM6
COM6 COM6
COM6