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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 2014 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.

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.

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. 

 

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, 

including 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 in which wear is not warranted, include but are 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 the 

company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR  

REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED 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.

Summary of Contents for OM-USB-2404-UI

Page 1: ...mail info omega com For latest product manuals www omegamanual info OM USB 2404 UI 4 Channel Universal Input USB Data Acquisition Module Shop online at omega com User sGuide Extended Warranty Program...

Page 2: ...6 USA Canada only Tel 203 359 1660 Fax 203 359 7700 e mail info omega com For Other Locations Visit omega com worldwide omega com info omega com The information contained in this document is believed...

Page 3: ...brating the OM USB 2404 UI 9 Chapter 3 Functional Details 10 Components 10 Spring terminals 10 Strain relief slot 11 USB connector 11 LED 11 Connecting wires to the spring terminals 11 TEDS sensor con...

Page 4: ...OM USB 2404 UI User s Guide 4 Environmental 19 Mechanical 19 Safety voltages 19 Spring terminal connectors 19 Accessory products 20...

Page 5: ...ing by phone fax or email with specific questions Phone 203 359 1660 Fax 203 359 7700 Email das omega com Hazardous voltages You can connect hazardous voltages to the OM USB 2404 UI device s spring te...

Page 6: ...ll bridge Measurement ranges vary for each type of measurement The device features built in current and voltage excitation The excitation circuit is protected from overcurrent and overvoltage fault co...

Page 7: ...SB 2404 UI User s Guide Introducing the OM USB 2404 UI 7 Functional block diagram OM USB 2404 UI functions are illustrated in the block diagram shown here Figure 1 OM USB 2404 UI functional block diag...

Page 8: ...atic charge If any components are missing or damaged notify Omega Engineering immediately by phone fax or e mail Phone 203 359 1660 Fax 203 359 7700 Email das omega com Installing the software Refer t...

Page 9: ...aution Do not disconnect any device from the USB bus while the computer is communicating with the OM USB 2404 UI or you may lose data and or your ability to communicate with the device If the LED is o...

Page 10: ...terminal in each connector are listed in the table below 6 terminal connector signal names Terminal number Signal name Signal description 1 T TEDS Data 2 T TEDS Common 3 EX HI Positive excitation or...

Page 11: ...s system dependent and may be less than 5 V No external power supply is required LED The LED indicates the device status When connected to a USB port the LED blinks steadily to indicate that the devic...

Page 12: ...erating voltages and information about overvoltage protection Figure 5 Connecting a grounded signal source Figure 6 Connecting a floating signal source Don t connect to signals or use for measurements...

Page 13: ...e OM USB 2404 UI across the HI and LO terminals The current is computed from the voltage that the ADC measures across an internal shunt resistor Voltage and current mode connections are shown in Figur...

Page 14: ...LO terminals These modes source a current which varies based on the resistance of the load between the HI and LO terminals The resulting resistance is calculated from the voltage measurement 2 wire a...

Page 15: ...the shielded cables Each channel has a built in thermistor for cold junction compensation CJC calculations For improved CJC sensor accuracy operate the OM USB 2404 UI in a stable temperature environme...

Page 16: ...h speed 10 ms for all channels Best 60 Hz rejection 110 ms for all channels Best 50 Hz rejection 130 ms for all channels High resolution 500 ms for all channels Conversion time One or more channels in...

Page 17: ...18 120 360 Current 25 mA 0 1 0 6 30 100 4 wire and 2 wire note 1 resistance 10 k 0 1 0 5 120 320 4 wire and 2 wire note 1 resistance 1 k 0 1 0 5 1200 3200 4 wire and 3 wire RTD Pt 1000 0 1 0 5 240 64...

Page 18: ...sistance 10 k 4 1 1 3 0 8 0 3 4 wire and 2 wire resistance 1 k 7 1 1 8 1 2 0 7 4 wire and 3 wire RTD Pt 1000 7 6 1 7 1 1 0 4 4 wire and 3 wire RTD Pt 100 10 8 1 9 1 9 0 9 Quarter bridge 350 5 4 1 0 1...

Page 19: ...le Table 12 Safety specifications Parameter Conditions Specification Channel to earth ground isolation Continuous 250 VAC Measurement Category II Note 3 Withstand 2300 VAC verified by a 5 second diele...

Page 20: ...erminal assignments per input mode Input mode Signal terminals 1 2 3 4 5 6 Voltage T T HI LO Current T T HI LO 4 wire resistance T T EX HI EX LO 2 wire resistance T T HI LO Thermocouple T T HI LO 4 wi...

Page 21: ...y 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 including but not limite...

Page 22: ...bine Paddlewheel Systems M U Totalizers Batch Controllers pH CONDUCTIVITY M U pH Electrodes Testers Accessories M U Benchtop Laboratory Meters M U Controllers Calibrators Simulators Pumps M U Industri...

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