Quatech DSC-200, DSC-300 Hardware Configuration, Factory default signal termination settings

Page 9

2 Hardware Configuration

The DSC-200/300 is automatically configured at boot time by the computer's BIOS or operating system. There are no required switches or jumpers to set for installation.

This chapter lists a number of jumper settings that control various hardware features. Jumpers J1-J4, located in a column near the D-9 connectors, control the RS-422 or RS-485 signal line termination. Jumpers J5-J8, located in a column just to the right of J1-J4, control how signals are routed from the UARTs to the connector, as well as full- or half- duplex operation. Jumpers J10-J13, grouped together at the end of the board opposite the D-9 connectors, control special options.

Any changes from the factory default should be made before installing the DSC-200/300 in the computer.

2.1 RS-422 or RS-485 Signal Line Termination

Jumpers J1-J4 allow the selection of 100-ohm RS-422 termination, 120-ohm RS-485 termination, or no termination at all. The factory default, shown in Figure 1, is RS-422 termination. For full details, see page 24.

Jumpers J1-J4

3

2

1

RS-422 termination (100 ohms)

(factory default)

Figure 1 --- Factory default signal termination settings

Quatech DSC-200/300 User's Manual

9

Page 8 Page 10
Image 9
Page 8 Page 10
Contents DSC-200/300 Warranty Information Page Declaration of Conformity Manufacturers Name Using the New Hardware Found Wizard RS-422 or RS-485 Signal Line TerminationAddress Map and Special Registers Base Address and Interrupt Level IRQPage General Information IND Option --- Surge Suppression Upgrade FeaturesFactory default signal termination settings Hardware ConfigurationFull-duplex/Half-duplex Operation Signal ConnectionsClock Rate and Optional Registers Enable Scratchpad Register SPAD, J13Clock multiplier jumper options Force High-Speed Uart Clock X2, X4, or X8, J10-J12Jumper/connector locations Hardware InstallationChannel Address Range Interrupt Status Register Enabling the Special RegistersBit Name Description Options RegisterRR1 RR0 Clock Rate MultiplierWindows Millennium Windows ConfigurationWindows Windows Windows Page Using the New Hardware Found Wizard Windows NT QTPCI.EXE DOS and Other Operating SystemsQTPCI.EXE Basic Mode display QTPCI.EXE Expert Mode display OS/2 Jumper/Channel correspondence External ConnectionsRclk RTS/CTS HandshakeAUXIN/AUXOUT Loopback XclkHalf-Duplex/Full-Duplex Selection Half- or full-duplex selection RS-422/485 Line termination resistance values Termination ResistorsRS-422/485 Peripheral Connection DSC-200/300 connector definitionsINTA# PCI Resource Map10Specifications Computer will not boot up TroubleshootingDSC-200/300 Revision June
Top Page Image Contents