The 8B33-04 is an isolated True RMS input module that converts AC voltage inputs from 0V to 150V to a standard 0V to 5VDC output. It features 1500Vrms transformer isolation, 120dB common-mode rejection, and protection against transient events per ANSI/IEEE C37.90.1 and continuous overvoltage up to 350Vrms. The module operates with a +5VDC supply, draws 30mA, and maintains ±0.25% accuracy at 50/60Hz within 5-100% span. Its physical dimensions are 1.11" x 1.65" x 0.40" (28.1mm x 41.9mm x 10.2mm), and it operates from -40°C to +85°C. It is UL/cUL listed, CE compliant, and compliant with RoHS III Directive 2015/863.
Each 8B33 True RMS input module provides a single channel of AC input which is converted to its True RMS DC value, filtered, isolated, amplified, and converted to a standard process voltage output (see Block Diagram).The field voltage or current input signal is processed through a pre-amplifier and RMS converter on the field side of the isolation barrier. The converted DC signal is then chopped by a proprietary chopper circuit and transferred across the transformer isolation barrier, suppressing transmission of common mode spikes and surges. The computer side circuitry reconstructs, filters, and converts the signal to an industry standard output of 0 to 5VDC.Special input circuits provide protection against accidental connection of power line voltages up to 350VAC and against transient events defined by ANSI/IEEE C37.90.1.
| Dataforth Corporation | |
|---|---|
| Product Category | Data Acquisition |
| Product Number | 8B-33-04 |
| Product Name | Isolated True RMS Input Modules |
| Data Acquisition | Input Module |
| Form Factor | Backpanel |
| Outputs | Analog Voltage Output |
| User Interface | None |
| Application | General Lab & Industrial |
