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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-485-1

Page 1: ...www omega com e mail info omega com User sGuide OMG USB 485 1 Single Port RS 422 485 530 to USB Adaptor Shop online at...

Page 2: ...court France TEL 33 0 1 61 37 29 00 FAX 33 0 1 30 57 54 27 Toll Free in France 0800 466 342 e mail sales omega fr Germany Austria Daimlerstrasse 26 D 75392 Deckenpfronn Germany TEL 49 0 7056 9398 0 FA...

Page 3: ...SIGNMENTS DB25 MALE 8 SPECIFICATIONS 9 ENVIRONMENTAL SPECIFICATIONS 9 MANUFACTURING 9 POWER CONSUMPTION 9 MEAN TIME BETWEEN FAILURES MTBF 9 PHYSICAL DIMENSIONS 9 APPENDIX A TROUBLESHOOTING 10 APPENDIX...

Page 4: ...Figures Figure 1 RS 530 422 4 Wire 485 Default 7 Figure 2 RS 485 2 Wire with Echo 7 Figure 3 RS 485 2 Wire No Echo 7 Figure 4 Asynchronous Communications Bit Diagram 14...

Page 5: ...es is that it doesn t 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 syst...

Page 6: ...tly from what is shown based on your version of windows The OMG USB 485 1 can be connected to any Upstream Type A port either at the PC host or an Upstream Hub The OMG USB 485 1 is hot pluggable meani...

Page 7: ...G USB 485 1 Page 3 Since you have already installed the software by running Setup simply click Next to proceed The drivers that were installed during setup will automatically be used to configure the...

Page 8: ...driver has been located click Finish You should see one more New Hardware Found indicating the actual port being created If you view your systems Device Manager at this point you should have a new CO...

Page 9: ...ing the assigned COM identifier shown above In this case it is COM5 but this assignment will vary from system to system At this point the hardware is recognized To verify operation use the supplied Wi...

Page 10: ...examples Switch SW1 ON enables adds and connects SW1 position OFF disables removes and disconnects SW1 Function 1 RS 485 Two Wire Auto Enable Disable 2 Echo Enable Disable 3 Adds or removes the 120 o...

Page 11: ...use the following examples to configure your adapter Figure 1 RS 530 422 4 Wire 485 Default Figure 2 RS 485 2 Wire with Echo Figure 3 RS 485 2 Wire No Echo O N 1 2 3 4 5 6 7 8 OFF RS 530 422 O N RS 4...

Page 12: ...The OMG USB 485 1 complies with the EIA 530 pin out with the following signals supported Signal Name Pin Mode GND Ground 7 RDB RX Receive Positive 16 Input RDA RX Receive Negative 3 Input CTSB CTS Cle...

Page 13: ...nsing Manufacturing All Printed Circuit boards are built 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...

Page 14: ...ill 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 Control S...

Page 15: ...adapter connected in a computer ready to run diagnostics 3 Visit Omega s website at www omega com for the latest software updates and newest manuals 4 Technical support is available Monday through Fr...

Page 16: ...422 is a differential interface that defines voltage levels and driver receiver electrical specifications On a differential i nterface logic levels are defined by the difference in voltage between a...

Page 17: ...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 electrical presence of the driver to...

Page 18: ...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 19: ...ul interference In such case the user will be required to correct the interference at his own expense EMC Directive Statement Products bearing the CE Label fulfill the requirements of the EMC directiv...

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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