SCM5B33V - True RMS Input Module for SCMVAS
CE is a mandatory standard for products on the market in the European Economic Area. By CE marking a product, the manufacturer ensures that the item meets the essential safety requirements set out in the applicable CE directive.
This product fully adheres to the Restriction of Hazardous Substances Directive 2002/95/EC, RoHS for short.  The directive covers the restriction of use of certain hazardous substances in electrical and electronic equipment and was adopted in February 2003 by the European Union.
The National Electrical Code (NEC) defines hazardous environments as areas “where fire or explosion hazards may exist due to flammable gases, vapours, liquids, dust or particles”. When such materials are found in the atmosphere of an area, a potential for explosion exists, which could be ignited if an electrical or other source of ignition is present. As defined by the classification authorities, certified devices are suitable for installation and operation within a Class 1, Division 2 environment. Class 1 environments are areas where there is a presence of flammable gases or vapours in the air, such as natural gas or petroleum vapour. Facilities including oil rigs, refineries, gas plants and automotive repair centres all fall within this category.
CSA certification indicates that a product, process or service has been tested to a Canadian or U.S. standard and it meets the requirements of an applicable CSA standard or another recognised document used as a basis for certification.
FM approved certification is a standard set by FM Global. Industrial and commercial companies around the world rely on products and services that are FM approved and specification tested to protect their properties from loss. The FM APPROVED mark, which is backed by scientific research and testing, advises customers that the product conforms to the highest standards.
ATEX is the name commonly given to the European Directive 94/9/EC, also known as ATEX 95 or ATEX Equipment Directive. The regulation applies to all equipment intended for use in explosive atmospheres, whether electrical or mechanical, including protective systems. There are two categories of equipment 'I' for mining and 'II' for surface industries. The directive covers a large range of equipment, potentially including electrical equipment used on fixed offshore platforms, in petrochemical plants, mines, flour mills and other areas where a potentially explosive atmosphere may be present.
Featured in:Dataforth Signal Conditioning Modules5B Voltage Input Modules
5 SCM5B33V versions available
Free delivery to UK mainland addresses

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SCM5B33V with 0 to +1V input, 0 to +5V output
SCM5B33V with 0 to +1V input, 0 to 1mA output
SCM5B33V with 0 to +1V input, 4mA to 20mA output
SCM5B33V with 0 to +1V input, 0 to +10V output
SCM5B33V with 0 to +1V input, 0 to 20mA output
All prices exclude VAT at current rate.
Minimum order value - £50 (exc. VAT and delivery).
Free delivery of the SCM5B33V to UK Mainland on orders over £50 (exc. VAT and delivery) when purchasing online - excludes Northern Ireland, Isle of Man, Isle of Wight, Scottish Islands and the Channel Islands.

* Lead time is indicative and is subject to change at time of ordering. Next business day delivery on in-stock products only (when ordered before 3pm).
** Contact us for quantity or project pricing.
† Additional delivery charge may be incurred for certain postcodes (calculated at checkout)

SCM5B33V overview

  • Interfaces RMS Voltage (0 - 300V) or RMS Current (0 - 5A)
  • Designed for Standard Operation with Frequencies of 45Hz to 1000Hz (Extended Range to 20kHz)
  • Compatible with Standard Current and Potential Transformers
  • Industry Standard Output of either 0-1mA, 0-20mA, 4-20mA, 0-5V or 0-10VDC
  • ±0.25% Factory Calibrated Accuracy (Accuracy Class 0.2)
  • 1500Vrms Continuous Transformer Isolation
  • Input Overload Protected to 480V Max (Peak AC & DC) or 10A RMS Continuous
  • ANSI/IEEE C37.90.1 Transient Protection
  • CSA Certified, CE and ATEX Compliant
  • Random Vibration : MIL-STD 202G, Method 214A, Condition 1
  • Swept Sine Vibration : MIL-STD-810G, Method 514.6, modified
  • Shock : MIL-STD-810F. Method 516.5
The SCMVAS (Signal Conditioning Modular Voltage Attenuator System) is an analog signal conditioning system designed to safely monitor and accurately measure voltage potentials up to 460VAC (1300V peak-to-peak). These high level voltages are typically found in industrial applications such as induction heaters or electric-motor drive controllers. The system reduces the input signal to a level suitable for interface to data acquisition systems, while at the same time providing various filter characteristics and 1500Vrms isolation.

For each channel of analog input, an attenuator module, SCMVAS-M, pre-conditions the signal which is then filtered and isolated, For signals comprised of harmonics or noncoherent content, the SCM5B33 True RMS Input module is recommended. Use of this module provides a DC output that is directly related to input signal power, or the RMS (Root Mean Square) value, allowing true RMS representation of input signals ranging from pulses to complex nonperiodic waveforms. The attenuator and signal conditioning modules have excellent stability over time and do not require recalibration. Overall system accuracy is ±0.06%.

Input signal connections to the SCMVAS-M attenuator module are made using a pluggable terminal block for ease of system assembly and reconfiguration. For safety purposes, the terminal block has a cover over the screws and there are no other exposed high-voltage points on the SCMVAS-M series modules, SCM5B modules, or the mounting backpanel.
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