SCM7B32-01D

Isolated Process Control Signal Conditioning Products S C M 7 B SCM7B32/33 Isolated Process Current/Voltage Input Modules Description The SCM7B32 current input modules accept input signals in the 4-20mA or mA ranges from the field and provide a high level output to the process control system (Figure 1). Current to voltage conversion occurs internal to the module, which is factory calibrated to ensure the highest accuracy. SCM7B33 voltage input modules accept input signals in the +1V to +5V or to ranges from the field and provide a high level output to the process control system. As an alternative, the S B can be used with an external resistor Dataforth S B R or e uivalent , to accept input signals in the 4-20mA or 0-20mA ranges. Using the external sense resistor allows the module to be removed without disrupting the current loop. All SCM7B33s are shipped with a SCM7BXR1 resistor. These modules incorporate a five pole filtering approach to maximi e both time and fre uency response by ta ing advantage of both Thomson Bessel and Butterworth characteristics. One pole of the filter is on the field side of the isolation barrier four are on the process control system side. After the initial field side filtering conversion S B only , the input signal is chopped by a proprietary chopper circuit and transferred across the transformer isolation barrier, suppressing transmission of common mode spi es and surges. The signal is then reconstructed and filtered for process control system output. Features • Accepts Current or Voltage Input • Provides High-Level Voltage Outputs • 1500Vrms Transformer Isolation • Accuracy, ± 0.03% of Span Typical, ± 0.1% Max • ANSI/IEEE C37.90.1 Transient Protection • Input Protected to 120Vrms Continuous Noise, pp H , rms H • 105dB CMRR • Easy DIN Rail Mounting SA S ertified • CE and ATEX Compliant Modules accept a wide 14 - 35VDC power supply range (+24VDC nominal). Their compact packages (2.13”x1.705”x0.605” max) save space and are ideal for high channel density applications. They are designed for easy DIN rail mounting using any of the DIN bac panels. 1500Vrms Isolation Barrier + + – VIN/IIN Surge Suppression and Protection 1 REXT* – 2 RINT** LPF (1 pole) Iso-Chopper II™ Amplifier Pat. Pending LPF (4 pole) 4 5 X 0 VOUT COM NC Backpanel Term Block Field-Side *REXT is a backpanel option for current to voltage conversion using either Dataforth P/N SCM7BXR1 (250Ω, 0.1%) or a user provided resistor. **RINT is installed internal to the SCM7B32 only. F i g u r e 1 : S C M 7 B 3 2 / 3 3 B l o ck +V –V 3 DC Supply D ia g r a m 7 2 ©1995-2017 Dataforth Corporation, All Rights Reserved Process Control System-Side For information call 800-444-7644 ISO9001:2008-Registered QMS DC Supply/ Oscillator 5 VS (14-35VDC) COM Isolated Process Control Signal Conditioning Products Typical❇ at and Module Input Signal Range Bias Current Resistance Normal Power Off Overload Protection Continuous Transient Output Signal Range(1) ffective Available Power(1) Resistance Protection Voltage/Current Limit CMV (Input-to-Output) Continuous Transient CMRR (50 or 60Hz) Accuracy(2) Linearity(3) Stability to Gain Input Offset Output Offset Noise Peak at 5MHz B/W RMS at 10Hz to 100kHz B/W Peak at 0.1Hz to 10Hz B/W Frequency and Time Response Bandwidth, – 3dB NMR (– 3dB at 100Hz) Step Response, 90% Span Supply Voltage Current(1) Sensitivity Ordering Information D SCM7B32 SCM7B33 4-20mA, 0-20mA N/A +1 to +5V, 0 to +5V ± 0.1nA Model SCM7B32-01 SCM7B32-02 SCM7B33-01 SCM7B33-02 Input Range 4 to 20mA 0 to 20mA +1 to +5V 0 to +5V S C M 7 B Specifications S C M 7 B Output Ranges Available † Output Range Part o u fi * 120Vrms max ANSI/IEEE C37.90.1 † † 40mW * Continuous Short to Ground ± 12V, ± 14mA * . NONE A D SCM7B32-01 SCM7B32-01A SCM7B32-01D * * 1500Vrms ANSI/IEEE C37.90.1 105dB ± 0.03% ± 0.1% ± 0.01% ± 0.02% +1 to +5V 0 to +5V 0 to +10V * am e * * * Span typical, Span max Span typical, Span max * ppm N/A(4) Span * * * * * * * RTI(5) 100Hz dB per Decade above 5ms H * * * * 14 to 35VDC 12mA ± 0.0001%/ %V S * 2.13” x 1.705” x 0.605” max (54.1mm x 43.3mm x 15.4mm max) * Environmental Operating Temperature Range Storage Temperature Range Relative Humidity Emissions EN61000-6-4 Radiated, Conducted Immunity EN61000-6-2 RF ESD, EFT to to 0 to 95% Noncondensing ISM, Group 1 Class A ISM, Group 1 Performance A ± 0.5% Span Error Performance B * * Mechanical Dimensions (h)(w)(d) * * * * * * * * NOTES: ❇ ontact factory or your local Dataforth sales office for maximum values. Specification same as preceding model Output Range and Supply urrent specifications are based on minimum output load resistance. inimum output load resistance is calculated by OUT2/PE, where PE is the output ffective Available Power that guarantees output range, accuracy, and linearity specifications. Accuracy includes the effects of repeatability, hysteresis, and linearity. For SCM7B33, does not include SCM7BXR1 accuracy. Linearity is calculated using the best fit straight line method. Input offset term included in output offset specification. (5) RTI = Referenced to Input. Visit our website www.dataforth.com ©1995-2017 Dataforth Corporation, All Rights Reserved 7 3 ISO9001:2008-Registered QMS