SCM7B37K-21D

Isolated Process Control Signal Conditioning Products S C M 7 B SCM7B37 Non-Linearized Isolated Thermocouple Input Modules Description SCM7B37 non-linearized modules accept a single channel of input from Type , , T, , R, S, or B thermocouples. The signal is filtered, isolated, amplified, and converted to a high level analog voltage for output to the process control system (Figure 1). Features • Interfaces to Type J, K, T, E, R, S, and B Thermocouples Cold junction compensation (CJC) is performed using an NTC thermistor see Additional S B Part Numbers section for P N and AN for further information externally mounted under the field side terminal bloc on the bac panel Figure . Open thermocouple detection is upscale using a 30nA current source in the input circuitry. • Provides High-Level Voltage Outputs • 1500Vrms Transformer Isolation • Accuracy, ± 0.03% of Span Typical, ± 0.1% Max 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. • ANSI/IEEE C37.90.1 Transient Protection After the initial field side filtering, the input signal is chopped by a proprietary chopper circuit and transferred across the transformer isolation barrier, suppressing transmission of common mode spikes and surges. The signal is then reconstructed and filtered for process control system output. • 85dB NMR at 60Hz, 80dB at 50Hz 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. • CE and ATEX Compliant • Input Protected to 120Vrms Continuous Noise, pp H , rms H • 160dB CMRR • Easy DIN Rail Mounting SA S ertified 1500Vrms Isolation Barrier R e fe r to A N 7 0 1 fo r V O U T to t e m p e r a t u r e oc n ev r si o n i n f o r m a t i o n Shield** + – X Surge Suppression, Protection, 2 LPF (1 pole), Open Detection and CJC 0 1 Thermocouple RT* Iso-Chopper II™ Amplifier Pat. Pending LPF (4 pole) 4 5 VOUT COM Backpanel Term Block Field-Side *RT is a backpanel mounted NTC thermistor used as a cold junction compensation (CJC) sense element. 3 +V –V DC Supply **Shield ground-tie shown for ungrounded thermocouple configuration. F i g u r e 1 : S C M 7 B 3 7 B l o ck D ia g r a m 8 0 ©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 SCM7B37 Input Signal Range Bias Current Resistance Normal Power Off Overload Protection Continuous Transient Output Signal Range(2) ffective Available Power(2) Resistance Protection Voltage/Current Limit CMV (Input-to-Output) Continuous Transient CMRR (50 or 60Hz) Accuracy(3) Linearity(4) Stability to Gain Input Offset Zero Suppression Output Offset Noise Peak at 5MHz B/W RMS at 10Hz to 100kHz B/W Peak at 0.1Hz to 10Hz B/W CJC Accuracy(7), to ambient Open Input Response Open Input Detection Time Frequency and Time Response Bandwidth, – 3dB NMR (50/60Hz) Step Response, 90% Span Supply Voltage Current(2) Sensitivity Mechanical Dimensions (h)(w)(d) Environmental Operating Temperature Range Storage Temperature Range Relative Humidity Emissions EN61000-6-4 Radiated, Conducted Immunity EN61000-6-2 RF ESD, EFT Ordering Information D Model‡ Thermocouple(1) (See Ordering Information) – 30nA Accuracy(3) ica a Input Range SCM7B37J-01 to F to SCM7B37J-10 to F to SCM7B37J-11 Linearity(4) ica a ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . SCM7B37J-12 to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . 40mW SCM7B37J-13 Continuous Short to Ground ± 12V, ± 14mA to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . SCM7B37K-02 to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . SCM7B37K-20 to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . SCM7B37K-21 to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . SCM7B37K-22 to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . SCM7B37K-23 to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . SCM7B37T-03 to F to ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . SCM7B37E-04 to F to F ± 0.03% . ± 0.1% . ± 0.01% . ± 0.02% . Upscale