Model U3W Bridge Based Sensor In-Line Amplifier DESCRIPTION The Model U3W amplifier supplies a highly regulated bridge excitation voltage for the transducer and converts the millivolt signal of the transducer to a 4 mA to 20 mA three-wire current output signal. The Universal In-line features two selectable exci- tation voltages, programmable gain settings, a wide adjustment range on the zero, and a buffered solid-state shunt cal relay for quick calibration. FEATURES • Strain gage sensor amplifier • 18 Vdc to 32 Vdc supply voltage • NEMA 4 housing • Selectable excitation voltages: 3 V or 5 V @ 70 mA • 4-20 mA analog output • Increases signal-to-noise ratio in noisy environments • Effects of voltage drops in excitation sources are eliminated • Signals may be sent to the data systems from low impe- dence sources Model U3W PERFORMANCE SPECIFICATIONS OPTION CODES Many range/option combinations are available in Characteristic Measure 2-pole active our quick-ship and fast-track manufacture pro- filter Number of channels 1 grams. Please see http://sensing.honeywell.com/ TMsensor-ship for updated listings. Case material Plastic or painted Aluminum Filter setting 1 Hz 50 Hz Mounting Use #6 or #8 screws 3 Hz 100 Hz 5 Hz 300 Hz 10 Hz 500 Hz ENVIRONMENTAL SPECIFICATIONS 20 Hz 1000 Hz Characteristic Measure 30 Hz Temperature, operating -15 °C to 71 °C [5 °F to 160 °F] Sealing IP66 or NEMA 4 MOUNTINg DIMENSIONS AND CHARACTERISTICS TRANSDUCER INTERFACE Characteristic Measure Transducer type Bridge-based sensor Transducer excitation 3 Vdc or 5 Vdc @ 70 mA AMPLIFIER CHARACTERISTICS Characteristic Measure Supply voltage 18 Vdc to 32 Vdc TYPICAL SYSTEM DIAgRAM Current draw 70 mA Frequency response (-3 dB) dc: 7000 Hz with 350 ohm bridge dc: 5000 Hz with 5000 ohm bridge Rise time (0 % to 90 %) 54 ms with 350 ohm bridge 78 ms with 5000 ohm bridge Zero adjustment range, ±70 % coarse Zero adjustment range, fine ±25 % Span adjustment range 0.5 mV/V to 6.6 mV/V ±25 % fine adjust- ment Linearity 0.02 % of full scale Shunt calibration Solid state relay on board Signal output 4 mA to 20 mA (three-wire) Signal-to-noise ratio 65 db dc power supply rejection > 110 db ratio Not RoHS compliant 2 Honeywell • Sensing and Control Model U3W Bridge Based Sensor In-Line Amplifier Warranty. Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgement or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items it finds defective. The foregoing is buyer’s sole remedy and is in lieu of all warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages. While we provide application assistance personally, through our literature and the Honeywell web site, it is up to the customer to determine the suitability of the product in the application. Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this printing. However, we assume no responsibility for its use. For more information about Sensing and Control products, visit www.honeywell.com/sensing or call +1-815-235-6847 Email inquiries to info.sc@honeywell.com WARNINg PERSONAL INJURY • DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. Failure to comply with these instructions could result in death or serious injury. WARNINg MISUSE OF DOCUMENTATION • The information presented in this catalogue is for reference only. DO NOT USE this document as product installation information. • Complete installation, operation and maintenance information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in death or serious injury. Sensing and Control Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 USA 008831-1-EN IL50 GLO +1-815-235-6847 June 2008 Copyright © 2008 Honeywell International Inc. All rights reserved. www.honeywell.com/sensing