User manual

21PCI/ PCI Express-Communication User Manual
Chapter 2 Hardware Configuration
2.3.3.6 Terminator setup (for PCI-1601/1602/1612/1622)
You can install terminator resistors if necessary to match impedance. Each signal line
(Tx, Rx) has a separate resistor.
Especially in fields with serious electric noise, installing terminal resistors is helpful to
stabilize communications. Make sure that both sides of the RS-485 communication
ports are installed on BUS. See details in Chapter 5.2.2 and 5.2.3.
Figure 2.22 Resistor Selection (for PCI-1612/1622 series)
Figure 2.23 Resistor Selection (for PCI-1602 and PCIe-1622 series)
2.4 Card Installation
1. Install the driver; see chapter 3.1 and chapter 3.2.
2. Turn off the computer and all peripheral devices (such as printers and monitors).
3. Disconnect the power cord and any other cables from the back of the computer.
4. Remove the PC’s cover (refer to your user’s guide if necessary).
5. Install and plug the PCI/PCIe communication card on your PCI/PCIe BUS.
6. Replace the PC’s cover. Connect the cables you removed in step 3.
7. Turn the computer power on.
8. Driver will install PCI/PCIe Communication card automatically, see chapter 3.3
and 3.4 and 3.5.
9. Test your COM port and verify if COM port could work normally, see chapter 4.
10. Refer to the pin assignment and cabling for further information, see chapter 5.
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120Ω 300Ω
120Ω 300Ω
Note! We strongly recommend that you install the software driver before you install the
hardware into your system, since this will guarantee a smooth and trouble-free
installation process.
Turn off your PC’s power supply whenever you install or remove the PCI/PCIe
communication card or its cables. Static electricity can easily damage computer
equipment. Ground yourself by touching the chassis of the computer (metal)
before you touch any boards. See the static warning on Ch.2