SCM7B33 Isolated Voltage Input Modules

SKU: SCM7B33
Category: Signal Conditioning
Manufacturers: Dataforth

Accepts Current or Voltage Input
Provides High-Level Voltage Outputs
±0.03% accuracy
CMRR up to 105dB
ATEX Compliant

Input Range
Output Range

from

119,70 €

excl. 19% VAT , plus

From	Unit price
5	127,68 €*
10	122,36 €*
20	119,70 €*

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Description
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Accepts Current or Voltage Input
Provides High-Level Voltage Outputs
1500Vrms Transformer Isolation
Accuracy, ±0.03% of Span Typical, ±0.1% Max
Noise 500µV Peak (5MHz), 300µV RMS (100kHz)
CMRR up to 105dB
80dB Per Decade of Attenuation Above 100Hz
Easy DIN Rail Mounting
ATEX Compliant

SCM7B33 voltage input modules accept input signals in the +1V to +5V or 0 to +5V ranges from the field and provide a high-level output to the process control system. As an alternative, the SCM7B33 can be used with an external 250 ohm resistor (Dataforth SCM7BXR1 or equivalent), 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 maximize both time and frequency response by taking 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, 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.

These 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" backpanels.

Item information	Value
Input Type:	Volt
Output Type:	Analog
Module series:	7B Series

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