DESCRIPTION The 3B20 is a wideband single-channel signal-conditioning module which interfaces 4-arm AC bridge transducer signals ranging between 1.5mV rms and 150mV rms, providing simultaneous precision voltage and current outputs. In addition, the module provides an AC excitation voltage of 2V rms to 10V rms at frequencies between 1kHz and 10kHz. The module withstands 130V rms at its current output terminals without damage thereby shielding computer-side circuitry from field-side over-voltage conditions. The 3B20 is a plug-in, mix-and-match, hot-swappable module and is easily field calibrated via front-panel zero and span adjustments for both voltage and current outputs. 3B Series Custom-Ranging Program - Externally-programmable Model 3B20-00, enables the user to configure a special input range, including tare weight suppression, by using the optional plug-on AC1310 ranging card, which houses user-supplied resistors to determine zero and span. To facilitate selecting resistors, a Wind features proprietary ESD protection circuitry, permanent damage may occur on devi ces subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. 3B20 Rev. 0 | Page 6 of 8 OUTLINE DIMENSIONS Figure 5. Outline Dimensions 3B20 Rev. 0 | Page 7 of 8 NOTES 3B20 Rev. 0 | Page 8 of 8 NOTES 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies. D05092-0-9/04(0) AC Strain Gage, Torque Transducer Input 3B20 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Specifications (typical @ +25C and 15 V dc, an