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Isolated AC Sine Wave Input 3B42 / 3B43 / 3B44
FEATURES
AC averaging technique used to rectify, amplify, and filter 50 Hz to 400 Hz sine-wave signals. Accepts inputs of between 20 mV to 550 V rms to give an rms output reading. Module provides simultaneous precision voltage and current outputs. Module circuitry can withstand 130v rms at the input screwterminals. All 3B42, 3B43, & 3B44 series modules are mix-and-match and Hot Swappable.
FUNCTIONAL BLOCK DIAGRAM
Figure 1. 3B42, 3B43, & 3B44 Functional Block Diagram
APPLICATIONS
Industrial signal conditioning Industrial signal isolation Industrial signal filtering
Output modules accept 0 to +10V (or +10V) single-ended signals and provide an isolated 4-20 mA (or 0-20 mA) process signal. All modules feature a universal pin-out and may be readily hot-swapped under full power and interchanged without disrupting field wiring.
The Analog Devices 3B Series Signal Conditioning Subsystem is designed to easily handle signal conditioning problems in DataShee measurement and control applications. Some typical uses are in The 3B Series of Signal Conditioning I/o Subsystems provide a microcomputer-based data acquisition systems, programmable .com low-cost, versatile method of transferring analog transducer controllers, analog recorders, dedicated control systems, and any signals to a data acquisition, monitoring or control system other applications where monitoring of temperature, pressure, without the inherent noise, non-linearity, drift and extraneous flow and analog signals are required. Since each input module voltages. The modules are designed to directly accept analog features two simultaneous outputs, the voltage output can be signals from Thermocouples, RTD's, AC and DC Strain Gages, used to provide an input to a microprocessor-based data Torque Transducers, Frequency Transducers, LVDTs, millivolt acquisition or control system while the current output can be or process current signals. The modules amplify, isolate, used for analog transmission, operator interface, or an analog linearize and convert the transducer output signals to backup system. standardized analog inputs for high-level analog I/O
PRODUCT OVERVIEW
subsystems. The 3B Series Subsystem consists of a 10" relay rack with universal mounting backplane and a family of plug-in (up to 16 per rack) input and output signal conditioning modules. Eight and four channel backplanes are also available. Each backplane incorporates screw terminals for sensor inputs and current outputs and a 26-pin connector for high-level singleended voltage outputs to the user's equipment. The input modules feature complete signal conditioning circuitry optimized for specific sensors or analog signals and provide two simultaneous high-level analog outputs: 0 to +10V (or +10V) and 4-20 mA (or 0-20 mA).
Each input module is a single-channel signal conditioner which plugs into a socket on the backplane and accepts its signal from the input screw terminals. All input modules provide input protection, amplification and filtering of the input signal, accuracy of +0.1%, low drift of +1 uV/ oC (low-level input modules), and feature two high-level analog outputs that are compatible with most process instrumentation. The isolated input modules also provide +1500 V peak isolation. The choice of a specific 3B module depends upon the type of input signal. Input modules are available to accept millivolt, volt, process current, thermocouple, RTD, AC and DC strain gage, frequency and LVDT inputs. The voltage output of each module is available from the system I/O connector while the current output is available on the output screw terminals.
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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 .com of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.326.8703 (c) 2004 Analog Devices, Inc. All rights reserved.
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3B42 / 3B43 / 3B44 GENERAL DESCRIPTION
The 3B42, 3B43, and 3B44 are single-channel AC sine wave signal conditioning modules which use an AC averaging technique to rectify, amplify, and filter 50 Hz to 400 Hz sinewave signals ranging from 20 mV to 550 V rms to give an rms output reading. Simultaneous precision voltage and current outputs are provided including isolation (+1500 V peak inputto-output and power). The 3B42 and 3B43 modules withstand 220 V rms, and Model 3B44 withstands 550 V rms at its input terminals without damage, thereby shielding computer-side circuitry from field-side over-voltage conditions. Each plug-in, mix-and-match, hot-swappable module is easily field calibrated via front-panel zero and span adjustments for both voltage and current outputs. 3B Series Custom-Ranging Program - Externally. programmable versions, Models 3B42-00, 3B43-00, and 3B4400, enable the user to configure a special input range by using the optional plug-on AC1310 ranging card, which houses usersupplied resistors to determine zero and span. To facilitate selecting resistors, a Windows program, 3B-CUSTOM, calculates resistor values based on the user-desired input/output ranges. Signal isolation by transformer coupling uses a proprietary modulation technique for linear, stable and reliable performance. The differential input circuit on the field side is fully floating, eliminating the need for any input grounding. A demodulator on the computer side of the signal transformer recovers the original signal, which is then filtered and buffered to provide a low-noise, low-impedance output signal.
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3B42 / 3B43 / 3B44
3B42, 3B43 and 3B44 Models Available
Model 3B42-00 3B42-01 3B42-02 3B42-Custom Model 3B43-00 3B43-01 3B43-Custom Model 3B44-00 3B44-01 3B44-02 3B44-Custom
1 2
Input Range Externally Programmable2 0 mV to +50 mV rms 0 mV to +100 mV rms * Input Range Externally Programmable2 0 V to +10 V rms * Input Range Externally Programmable2 0 V to +150 V rms 0 V to +250 V rms *
Output Ranges1 0 V to +10 V & 0 mA to 20 mA 0 V to +10 V & 0 mA to 20 mA 0 V to +10 V & 0 mA to 20 mA * Output Ranges1 0 V to +10 V & 0 mA to 20 mA 0 V to +10 V & 0 mA to 20 mA * Output Ranges1 0 V to +10 V & 0 mA to 20 mA 0 V to +10 V & 0 mA to 20 mA 0 V to +10 V & 0 mA to 20 mA *
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Output current range may be user programmed to 4 mA to 20 mA using jumper supplied. Requires AC1310 ranging card. * Custom Input/Output ranges are available. Refer to configuration guide.
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3B42, 3B43 and 3B44 Specifications
(typical @ +25C and 15 V dc, and +24 V dc Power) Description Model 3B42 Input Ranges Standard Ranges, 50 Hz to 400 Hz Custom Ranges, 50 Hz to 400 Hz Refer to Model Table 20 mV rms to 1 V rms Output Ranges Voltage (RL > 2 k) Current (RL + 0 to 850 )
1
Model 3B43
Model 3B44
Refer to Model Table 1 V rms to 50 V rms
Refer to Model Table 50 V rms to 550 V rms
0 V to +10 V 4 mA to 20 mA or 0 mA to 20 mA Accuracy2
* *
* *
Initial @ +25C Nonlinearity
0.05% Span 0.02% Span Stability vs. Temperature
* *
* *
Voltage Output Zero Span Current Output3 Zero Span Zero and Span Adjustment Range
4
0.005% of Span/C 0.005% of Reading/C
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25 ppm of Span/C 25 ppm of Reading/C 5% of Span
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* * *
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3B42 / 3B43 / 3B44
Input Bias Current Input Resistance +1 nA 100 M Noise Input, 0.1 Hz to 10 Hz Bandwidth Output, Ripple and Noise Bandwidth, -3 dB Output Rise Time, 10% to 90% Span 5 V rms 50 V rms 3 Hz 200 ms Common-Mode Voltage (CMV) Input-to-Output, Continuous Transient 1500 V peak, maximum ANSI/IEEE C37.90.1-1989 Common Mode Rejection (CMR) 1 k Source Imbalance, 50/60 Hz 100 dB Input Protection Continuous Transient Voltage Output Protection Current Output Protection 220 V rms, maximum ANSI/IEEE C37.90.1-1989 Continuous Short to Ground 130 V rms, continuous Power Supply Voltages 15 V dc Supplies Rated Operation Current Sensitivity +24 V dc Loop Supply Rated Operation Current Sensitivity Mechanical Dimensions +12 V dc to +30 V dc +27 mA @ lout = 20 mA 0.0002% span/V 3.15" x 3.395" x 0.775" (80.0 mm x 86.2 mm x 19mm) Environmental Temperature Range Rated Performance Storage Relative Humidity, 24 hours RFI Susceptibility -25C to +85C -55C to +85C 0 to 95% @ +60C noncondensing 0.5% Span error @ 400 MHz, 5 Watt, 3 ft * * * * * * * * * * * * * * * *
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+5 nA 250 k
+3 nA 1 M
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550 V rms, continous * * *
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* * * * * *
(11.5 V dc to 16.5 V dc) 10 mA 0.01% span/V
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* Specifications same as model 3B42. 1 For a 0 to 20 mA range, a typical minimum output current is 10 A. 2 Includes the combined effects of repeatability, hysteresis, and nonlinearity. 3 With respect to the voltage output. 4 A wide range of custom zero suppression and span is available with Models 3B42-00, 3B43-00 and 3B44-00, using the AC1310 ranging card. 5 +24 V dc loop power is required for driving the current output at loads up to 850. If a current output load of 400 or less is applied, +15 V dc is sufficient for loop power. If only voltage output is used, loop power is not required. Specifications subject to change without notice. .Bottom of Form
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3B42 / 3B43 / 3B44 PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS
Figure 3 3B42, 3B43, & 3B44 Input Field Connections
Table 1. Pin Function Descriptions--
Pin No. 1 2 3 4 Description N/C HI LO N/C
Figure 4 . Model 3B Series Module, with pin-out assignments.
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ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
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3B42 / 3B43 / 3B44 OUTLINE DIMENSIONS
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Figure 5. Outline Dimensions
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3B42 / 3B43 / 3B44 NOTES
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3B42 / 3B43 / 3B44 NOTES
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(c) 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies. D05160-0-9/04(0)
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