Each DSCT32 current input transmitter provides a single channel of analog input which is filtered, isolated, amplified, and converted to a process current output. Signal filtering is accomplished with a five-pole filter, which provides 80dB per decade of normal-mode rejection above 100Hz. An anti-aliasing pole is located on the field side of the isolation barrier, and the other four are on the process loop side. After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges.

Special input and output circuits on the DSCT32 transmitters provide protection against accidental connection of power-line voltages up to 240VAC and against transient events as defined by ANSI/IEEE C37.90.1. Signal and loop power lines are secured to the module using screw terminals, which are in pluggable terminal blocks for ease of system assembly and reconfiguration.

The modules have excellent stability over time and do not require recalibration, however, zero and span settings are adjustable up to ±10% to accommodate situations where fine-tuning is desired. The adjustments are made using potentiometers located under the front panel label and are non-interactive for ease of use.
  • Accepts Milliamp Level Signals
  • Process Current Output
  • 1500Vrms Transformer Isolation
  • ANSI/IEEE C37.90.1 Transient Protection
  • Input and Output Protected to 240VAC Continuous
  • Up to 60V Loop Voltage
  • 160dB CMR
  • NMR, 80dB Per Decade Above 100Hz
  • ±0.03% Accuracy
  • ±0.01% Linearity
  • Easily Mounts on Standard DIN Rail
  • CSA and FM Approvals Pending
  • CE Compliant
Analog Current Input Transmitters

DSCT32 Devices


Part Number Input RangeOutput RangeMechanical FormatInternal Power SupplyIsolation VoltageIsolation TypeAccuracySupply Voltage
4 to 20 mA 4 to 20 mA DIN rail 1500 Vrms Transformer ±0.03% 10.8V to 60V
0 to 20 mA 4 to 20 mA DIN rail 1500 Vrms Transformer ±0.03% 10.8V to 60V

Frequently Asked Questions


Can Dataforth provide calibration reports for modules I purchased?
Yes we can provide calibration reports for the modules that you purchased.

You can either
a) visit https://www.dataforth.com/TestDataReport.aspx to search for Test Report Datasheets by Serial Number or
b) you can send us a list of model numbers and their serial numbers to support@dataforth.com

Is an external conversion resistor required in order to use the DSCT32 module?
No, an external conversion resistor is not required in order to use the DSCT32 module. The current/voltage conversion is achieved by an internal resistor as shown in the block diagram in the data sheet.

An external conversion resistor in the case of the DSCT32 could be used to shunt off some of the current from the module and allow a larger input current range; then they could also be used with voltage input modules to convert a non-standard current range into an input voltage range.

Keywords/Phrases: DSCT32, internal resistor, external conversion resistor

How does the load resistance of a module affect the noise at the output?
Noise at the output of a module is independent of load resistance.
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Dataforth offers a wide range of custom modules for those instances when our standard commercial off-the-shelf (COTS) solutions don't quite meet your specific application needs. Contact Customer Service and Application Support to discuss design guidelines and design feasibility. Customer Service and Application Support can be reached at sales@dataforth.com or +1-800-444-7644.