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Advantech PCL-740 User Manual page 14

Serial communication rs-232/422/485/current-loop interface card

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The board will be shipped in the RS-232 mode. If your requirements
are the same as this default setting, you may simply install the card
without the need for any setting up. The PCL-740 DIP switch and
jumper default settings are as shown below:
Protocol selection - RS-232 mode (JP5)
Interrupt level - IRQ4 (JP1)
IRQ
15 12 11 10 9
7
6
5
4
3
Base address - 3F8 (SW1)
ON
Chapter 2 Hardware Installation
11

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