Kontron PCI-COM-8ULP, User Manual

Page: 22 / 38

page 22 PCI-COM-8ULP User’s Guide
Data Cable Wiring
RS485 SignalPin Connection
Ain/out+
2
Ain/out- 3
100
Ω to Ground 5
Baud Rate Ranges
The jumper labeled CLK X8 provides a means to select baud rates in a higher range.
When a jumper is not placed on the out the CLK X8 position, the baud rate range is up
to 115,200 baud. When it is in the CLK X8 position, the baud rate range is up to
921,600 baud.
Interrupts
Please note that, in WindowsNT, changes must be made to the system registry to
support IRQ sharing. The following is excerpted from "Controlling Multiport Serial I/O
Cards" provided by Microsoft in the MSDN library,
documentid:mk:@ivt:nt40res/D15/S55FC.HTM
also available in the WindowsNT Resource Kit.
The Microsoft serial driver can be used to control many dumb multiport serial cards.
Dumb indicates that the control includes no on-board processor. Each port of a multiport
card has a separate subkey under the HKLM\CurrentControlSet\Services\Serial subkey
in the registry. In each of these subkeys, you must add values for DosDevices, Interrupt,
InterruptStatus, PortAddress, and PortIndex because these are not detected by the
Hardware Recognizer. (For descriptions and ranges for these values, see Regentry.hlp,
the Registry help file on the WindowsNT Workstation Resource Kit CD.)
For example, if you have an eight-port card configured to use address 0xFC00 with an
interrupt of 05, the values in the Registry are: