Omega OMG-USB-SER-2 manual Technical Description, Features, RS-232 DB-9 Male

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Technical

Technical Description

The OMG-USB-SER-2utilizes two USB UARTs. These chips feature programmable baud rate, data format, 128 byte Dual Port TX Buffer, and 384 byte Dual Port RX Buffer. The RS-232/422/485 transceiver supports data rates up to 921.6K baud for RS-422/485 and up to 460.8K baud for RS-232.

Features

Hot pluggable device that does not require opening the case

No system resources are required (i.e. I/O ports or IRQ’s)

LED status indicators for USB Enabled and port activity

Connector Pin Assignments

 

 

 

 

 

RS-422/485

(DB 9 Male)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal

 

 

Name

 

Pin #

 

Mode

 

GND

 

 

Ground

5

 

 

 

 

TX +

 

 

Transmit Data Positive

4

 

Output

 

TX-

 

 

Transmit Data Negative

3

 

Output

 

RTS+

 

 

Request To Send Positive

6

 

Output

 

RTS-

 

 

Request To Send Negative

7

 

Output

 

RX+

 

 

Receive Data Positive

1

 

Input

 

RX-

 

 

Receive Data Negative

2

 

Input

 

CTS+

 

 

Clear To Send Positive

9

 

Input

 

CTS-

 

 

Clear To Send Negative

8

 

Input

RS-232

(DB-9 Male)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal

 

 

Name

 

Pin #

 

Mode

 

 

GND

 

 

Ground

 

5

 

 

 

 

TX

 

 

Transmit Data

 

3

 

Output

 

 

RTS

 

 

Request To Send

 

7

 

Output

 

 

DTR

 

 

Data Terminal Ready

 

4

 

Output

 

 

RX

 

 

Receive Data

 

2

 

Input

 

 

CTS

 

 

Clear To Send

 

8

 

Input

 

 

DSR

 

 

Data Set Ready

 

6

 

Input

 

 

DCD

 

 

Data Carrier Detect

 

1

 

Input

 

 

RI

 

 

Ring Indicator

 

9

 

Input

 

OMG-USB-SER-2

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Contents User’sGuide Contents Figures What’s Included IntroductionOverview System Installation InstallationOperating System Installation OMG-USB-SER-2 Electrical Interface Selection ConfigurationOriginal configuration 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-422 Appendix C Electrical InterfaceRS-232 RS-485 Appendix D Asynchronous Communications Asynchronous Communications Bit DiagramCanadian Radio Interference Regulations Appendix E Compliance NoticesFederal Communications Commission Statement EMC Directive Statement EN60950 IEC950 ‘SafetyWARRANTY/DISCLAIMER Temperature