Contec PIO-32/32B(PCI)V, User Manual, Page: 24 / 59

2. Setup
PIO-32/32B(PCI)V
17
Selecting Power Supply
The photo-insulation circuits need power supply isolated from the PC system. This board equips an on
board isolated power supply (12VDC, 250mA) for driving photo-insulation circuits. You can select to
use this internal power supply or use an external power supply for driving the photo-insulation circuits
in unit of two ports (16 channels) per common.
- When the internal power supply is used, the input section of this board consumes up to 80mA
current maximum and the output channel switching section consumes up to 60mA current
maximum. Note that the output current that can be supplied to the external device is therefore
110mA maximum in case you use internal power supply for all the input and output channels.
- The both internal and external supply must not be used simultaneously. Or the supply will be
broken down.
Setting method
Jumpers JP2 - JP9 are used to select the power supply for photo-insulation circuits. Refer following
table for details.
Figure 2.3. Power Supply Selecting
CAUTION
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
1 2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
3
3
3
3
3
3
3
3
Use Interna Power Use External Power
+0 port (Input)
+1 port (Input)
+2 port (Input)
+3 port (Input)
+4 port (Output)
+5 port (Output)
+6 port (Output)
+7 port (Output)
* Factory setting
Notes : These jumpers must be set in pairs.