Omega OMG-USB-SER-2 manual Configuration, Original configuration, Electrical Interface Selection

Page 7

Configuration

Configuration

Original configuration

This device ships with the following configuration. 422 mode,

120 ohm termination,

1K ohm pull up on RX+

1K ohm pull down on RX-

In order to change this configuration the box must be opened. Do this by removing the four screws located on the bottom. When reassembling please note that the top and bottom are keyed to fit in only one direction.

Electrical Interface Selection

Each of the two ports on the OMG-USB-SER-2can be individually configured as an RS-232, RS-422, or RS-485 interface. This is selectable via the DIP switches and DIP shunts. Each of the switch positions is described on the following page.

OMG-USB-SER-2

Page 4

Image 7
Contents User’sGuide Contents Figures Overview IntroductionWhat’s Included Operating System Installation InstallationSystem Installation OMG-USB-SER-2 Original configuration ConfigurationElectrical Interface Selection SW4 SW3 Switch ExamplesSW4 RS-232 DB-9 Male FeaturesConnector Pin Assignments RS-422/485 DB 9 Male Technical DescriptionSpecifications Appendix a Troubleshooting Appendix B How To Get Assistance RS-232 Appendix C Electrical InterfaceRS-422 RS-485 Appendix D Asynchronous Communications Asynchronous Communications Bit DiagramFederal Communications Commission Statement Appendix E Compliance NoticesCanadian Radio Interference Regulations EMC Directive Statement EN60950 IEC950 ‘SafetyWARRANTY/DISCLAIMER Temperature