Related Manuals for Omega OMG-USB-SER-2
Summary of Contents for Omega OMG-USB-SER-2
- Page 1 User’ s Guide Shop online at www.omega.com e-mail: info@omega.com OMG-USB-SER-2 Two Port RS-232/422/485 to USB Adaptor...
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Page 2: Table Of Contents
...1 NTRODUCTION ... 1 VERVIEW ’ ... 1 NCLUDED ...2 NSTALLATION PERATING YSTEM NSTALLATION ... 2 YSTEM NSTALLATION ...4 ONFIGURATION RIGINAL CONFIGURATION LECTRICAL NTERFACE ... 6 WITCH XAMPLES WITCH XAMPLES ONTINUED ...8 ECHNICAL ESCRIPTION ... 8 EATURES ONNECTOR SSIGNMENTS RS-422/485 (DB 9 Male)... - Page 3 D - A PPENDIX SYNCHRONOUS E - C PPENDIX OMPLIANCE EDERAL OMMUNICATIONS ANADIAN ADIO NTERFERENCE EMC D IRECTIVE TATEMENT Figures: Figure 1: Switch SW2...5 Figure 2: RS422/485 Interface Configuration ...6 Figure 3: Electrical Interface Configuration...7 Figure 4 - Asynchronous Communications Bit Diagram...14 ...14 OMMUNICATIONS ...15...
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Page 4: Introduction
I/O ports or IRQ’s. It does require a system that supports USB both in terms of hardware and operating system. What’s Included The OMG-USB-SER-2 is shipped with the following items. If any of these items is missing or damaged, contact the supplier. OMG-USB-SER-2 USB to RS-232/422/485 Serial I/O Adapter... -
Page 5: Installation
Windows. The OMG-USB-SER-2 can be connected to any upstream type “A” port either at the PC host or an upstream hub. The OMG-USB-SER-2 is hot pluggable, meaning there is no need to power down your computer prior to installation. - Page 6 You can access your new COM: ports by using the assigned COM: identifiers as shown above. In this case, it is COM 3 and 4. However, this assignment will vary from system to system. At this point, the hardware is recognized and ready to use. OMG-USB-SER-2 Page 3...
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Page 7: Configuration
Electrical Interface Selection Each of the two ports on the OMG-USB-SER-2 can be individually configured as an RS-232, RS-422, or RS-485 interface. This is selectable via the DIP switches and DIP shunts. -
Page 8: Figure 1: Switch Sw2
485 option, OFF for 422. OFF: No effect ON : Adds a 1 K ohm pull-down resistor to RX- 422 and 485 option. OFF: No effect ON : Adds a 120 ohm termination resistor between RX+ and RX- OMG-USB-SER-2 Configuration Port 1 Page 5... -
Page 9: Switch Examples
The receiver is disabled when the transmitter is enabled. In a two-wire setup the receiver will not echo back transmitted data. Note: Switch positions 1 and 2 are for port 1 and switch positions 3 and 4 for port OMG-USB-SER-2 Configuration In a two-wire setup the... -
Page 10: Switch Examples Continued
Port 2 : RS-485 two wire communication with no echo. The corresponding shunt is in the 422/485 position. Switches 485 2, NE 2, and Port 2 L, L, T, PU, and PD are all in the ON position. OMG-USB-SER-2 Configuration Port 1... -
Page 11: Technical Description
Technical Description The OMG-USB-SER-2 utilizes 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. -
Page 12: Specifications
500 mA per port. Mean Time Between Failures (MTBF) Greater than 150,000 hours. (Calculated) Physical Dimensions Package Length Package Width Package Height OMG-USB-SER-2 Specifications Storage -20º to 70º C (-4º to 158º F) 10 to 90% R.H. Non-Condensing 7.06 inches... -
Page 13: Appendixa - Troubleshooting
LED’s flashing as well as seeing echoed data on the screen. The loopback test first transmits a HEX pattern, 55AA, and then a ASCII string of data. If this test passes, then the OMG-USB-SER-2 is ready for use in your application. -
Page 14: Appendixb - How T O Get Assistance
If possible, please have the adapter connected in a computer ready to run diagnostics. Omega Engineering maintains a home page on the Internet. Our home page address is www.omega.com. The latest software updates, and newest manuals are available via our FTP site that can be accessed from our home page. -
Page 15: Appendixc - Electrical Interface
(ground) to determine binary logic states. The RS-232 and the EIA/TIA-574 specification define two types of interface circuits, Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE). The OMG-USB-SER-2 is a DTE device. RS-422 The RS-422 specification defines the electrical characteristics of balanced voltage digital interface circuits. -
Page 16: Rs-485
(Tx+ to Rx+ and Tx- to Rx-). Four wire mode allows full duplex data transfers. RS-485 does not define a connector pin-out or a set of modem control signals. RS-485 does not define a physical connector. OMG-USB-SER-2 Page 13... -
Page 17: Appendixd - Asynchronous Communications
The data rate and communication parameters for asynchronous communications have to be the same at both the transmitting and receiving ends. The communication parameters are baud rate, parity, number data bits character, OMG-USB-SER-2 Odd, Even Remain Idle or Unused next start bit STOP... -
Page 18: Appendixe - Compliance Notices
Consult the dealer or an experienced radio/TV technician for help Caution Omega Engineering is not responsible for any radio or television interference caused by unauthorized modifications of this equipment or the substitution of attachment of connecting cables and equipment other than those specified by Omega Engineering. -
Page 19: Emc Directive Statement
Always use cabling provided with this product if possible. If no cable is provided or if an alternate cable is required, use high quality shielded cabling to maintain compliance with EMC directives. OMG-USB-SER-2 Appendix E - Compliance Notices technology equipment ‘Safety... - Page 20 Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, includ- ing but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification.
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