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WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 

13 months

from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month

grace period to the normal 

one (1) year product warranty

to cover handling and shipping time. This

ensures that OMEGA’s customers receive maximum coverage on each product. 

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
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. This WARRANTY is VOID if the unit shows evidence of 
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components which wear are not warranted, including but not 
limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, 
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be
as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR 
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE,
AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND 
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF 
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of 
OMEGA with respect to this order, whether based on contract, warranty, negligence, 
indemnification, strict liability or otherwise, shall not exceed the purchase price of the 
component upon which liability is based. In no event shall OMEGA be liable for 
consequential, incidental or special damages.

CONDITIONS:  Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit. 

FOR 

WARRANTY

RETURNS, please have the 

following information available BEFORE 
contacting OMEGA:
1. Purchase Order number under which the product

was PURCHASED,

2. Model and serial number of the product under

warranty, and

3. Repair instructions and/or specific problems 

relative to the product.

FOR 

NON-WARRANTY

REPAIRS, consult OMEGA

for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1.  Purchase Order number to cover the COST 

of the repair,

2. Model and serial number of the product, and
3. Repair instructions and/or specific problems 

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.

© Copyright 2002 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.

Summary of Contents for OMG-USB-SER-2

Page 1: ...www omega com e mail info omega com User sGuide OMG USB SER 2 Two Port RS 232 422 485 to USB Adaptor Shop online at...

Page 2: ...TCH EXAMPLES CONTINUED 7 TECHNICAL DESCRIPTION 8 FEATURES 8 CONNECTOR PIN ASSIGNMENTS 8 RS 422 485 DB 9 Male 8 RS 232 DB 9 Male 8 SPECIFICATIONS 9 ENVIRONMENTAL SPECIFICATIONS 9 MANUFACTURING 9 POWER...

Page 3: ...COMMUNICATIONS COMMISSION STATEMENT 15 CANADIAN RADIO INTERFERENCE REGULATIONS 15 EMC DIRECTIVE STATEMENT 16 Figures Figure 1 Switch SW2 5 Figure 2 RS422 485 Interface Configuration 6 Figure 3 Electr...

Page 4: ...s that it does not require opening the computer case nor does it require resources such as I O ports or IRQ s It does require a system that supports USB both in terms of hardware and operating system...

Page 5: ...ther 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 Connect the OMG USB SER 2 to an upstream host or hu...

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 hardwar...

Page 7: ...e 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 Selecti...

Page 8: ...OFF No effect ON Connects TX to RX for two wire operation PU 485 option OFF for 422 OFF No effect ON Adds a 1 K ohm pull up resistor to RX PD 485 option OFF for 422 OFF No effect ON Adds a 1 K ohm pul...

Page 9: ...pedance when the device is not actively transmitting data NE 485 option OFF for 422 OFF The receiver is always enabled In a two wire setup the receiver will echo back all transmitted data ON The recei...

Page 10: ...unt is in the 232 position The switches will have no effect 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...

Page 11: ...s 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 T...

Page 12: ...to UL 94V0 rating and are 100 electrically tested These printed circuit boards are solder mask over bare copper or solder mask over tin nickel Power Consumption This device is a high power USB device...

Page 13: ...E will be lit This should allow you to use the WinSSD utility and the supplied loopback plug to check communications The supplied loopback plug connects TD to RD If you decide to test the Modem Contr...

Page 14: ...n a computer ready to run diagnostics 3 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...

Page 15: ...c 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...

Page 16: ...and 32 receivers to be connected to one line This interface is ideal for multi drop or network environments RS 485 tri state driver not dual state will allow the e lectrical presence of the driver to...

Page 17: ...f a pre defined number of stop bits usually 1 1 5 or 2 An extra bit used for error detection is often appended before the stop bits Remain Idle or next start bit Odd Even or Unused STOP P BIT 5 to 8 D...

Page 18: ...e separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV t...

Page 19: ...022 Class B Limits and methods of measurement of radio interference characteristics of information technology equipment EN55024 Information technology equipment Immunity characteristics Limits and met...

Page 20: ...shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA...

Page 21: ...city Indicators Turbine Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industria...

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