Related Manuals for Omega OMG-USB-SER-4
Summary of Contents for Omega OMG-USB-SER-4
- Page 1 User’ s Guide Shop online at www.omega.com e-mail: info@omega.com OMG-USB-SER-4 Four Port RS-232/422/485 to USB Adaptor...
- Page 2 Toll Free in United Kingdom: 0800-488-488 e-mail: sales@omega.co.uk It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
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Page 3: Table Of Contents
Contents ................1 NTRODUCTION ....................1 VERVIEW ’ ................1 NCLUDED ................2 NSTALLATION ..........2 PERATING YSTEM NSTALLATION ................ 2 YSTEM NSTALLATION ................4 ONFIGURATION ..............4 RIGINAL CONFIGURATION ..........4 LECTRICAL NTERFACE ELECTION ................6 WITCH XAMPLES ............7 WITCH XAMPLES ONTINUED ............8 ECHNICAL... - Page 4 D - A ....14 PPENDIX SYNCHRONOUS OMMUNICATIONS E - C ........15 PPENDIX OMPLIANCE OTICES .... 15 EDERAL OMMUNICATIONS OMMISSION TATEMENT ......15 ANADIAN ADIO NTERFERENCE EGULATIONS EMC D ............16 IRECTIVE TATEMENT Figures: Figure 1: Switches SW2 and SW4..............5 Figure 2: RS422/485 Interface Configuration ..........6 Figure 3: Electrical Interface Configuration............7 Figure 4 - Asynchronous Communications Bit Diagram......14...
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Page 5: 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-4 is shipped with the following items. If any of these items is missing or damaged, contact the supplier. •... -
Page 6: Installation
Windows. The OMG-USB-SER-4 can be connected to any upstream type “A” port either at the PC host or an upstream hub. The OMG-USB-SER-4 is hot pluggable, meaning there is no need to power down your computer prior to installation. - Page 7 You can access your new COM: ports by using the assigned COM: identifiers as shown above. In this case, it is COM3, 4, 5 and 6. However, this assignment will vary from system to system. At this point, the hardware is recognized and ready to use. OMG-USB-SER-4 Page 3...
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Page 8: Configuration
Electrical Interface Selection Each of the four ports on the OMG-USB-SER-4 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 9: Figure 1: Switches Sw2 And Sw4
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-4 Page 5... -
Page 10: Switch Examples
Note: Switch positions 1 and 2 are for port 1 and switch positions 3 and 4 for port 2 on SW3. Switch positions 1 and 2 are for port 3 and switch positions 3 and 4 for port 4 on SW1. OMG-USB-SER-4 Page 6... -
Page 11: Switch Examples Continued
Port 4 : RS-485 two wire communication with echo. The corresponding shunt is in the 422/485 position. Switches 485 4, and Port 2 L, L, T, PU, and PD are all in the ON position, NE 4 is in the OFF position. OMG-USB-SER-4 Page 7... -
Page 12: Technical Description
Technical Technical Description The OMG-USB-SER-4 utilizes four 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 460.8K baud for RS-232. -
Page 13: Specifications
500 mA per port. Mean Time Between Failures (MTBF) Greater than 150,000 hours. (Calculated) Physical Dimensions Package Length 7.06 inches (17.93 cm) Package Width 5.32 inches (13.51 cm) Package Height 1.50 inches (3.81 cm) OMG-USB-SER-4 Page 9... -
Page 14: 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-4 is ready for use in your application. -
Page 15: 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 16: 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-4 is a DTE device. RS-422 The RS-422 specification defines the electrical characteristics of balanced voltage digital interface circuits. -
Page 17: 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-4 Page 13... -
Page 18: 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, stop bits (i.e. 9600,N,8,1). OMG-USB-SER-4 Page 14... -
Page 19: 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 20: 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-4 Page 16... - Page 21 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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