REX2 meter

The REX2 meter brings to the REX® meter family many enhancements designed to support emerging needs of smart grid initiatives. REX2 meters include enhanced memory, greater security, remote
upgradeability and additional capabilities to support smart grid needs such as outage and voltage monitoring.

Developed with technology and communications flexibility in mind, the REX2 meter provides communication to the Elster 900 MHz EA_LAN and to the ZigBee 2.4 GHz network. It also provides an open architecture framework for third party technology innovation supporting the Advanced Grid Infrastructure Initiative.


Quantities Demand and TOU Interval data recording Service control switch Security  
Standards compliance About EnergyAxis Data sheet  

First energy quantity, selected from one of the following:

  • kWh delivered
  • kWh received
  • kWh sum (delivered + received)
  • kWh net (delivered - received) - see note
  • alternate energy delivered
  • alternate energy received
  • alternate energy sum (delivered + received)
  • alternate energy net (delivered - received) - see note

 

Second energy quantity, selected from one of the following:

  • kWh delivered
  • kWh received
  • kWh sum (delivered + received)
  • kWh net (delivered - received) - see note
  • alternate energy delivered
  • alternate energy received
  • alternate energy sum (delivered + received)
  • alternate energy net (delivered - received) - see note

 

Note: If selected, the meter store delivered pulses in interval data records


A demand quantity, selected from one of the following:

  • kW delivered
  • kW received
  • kW sum
  • alternate demand delivered
  • alternate demand received
  • alternate demand sum

 

The meter stores demand data for up to 3 quantities selected from the following:

  • total demand of the demand metered quantity
  • demand for a specific tier of the demand metered quantity

Depending on the meter firmware version, the REX2 meter is capable of recording one or, beginning with meter firmware version 4.0, two sets of interval data. Each set contains 1 or 2 channels of information, depending on how the meter is programmed. Each set has its own, separate interval length that is configured independently. With two sets, it is possible to use set 1 to record interval data and to use set 2 as an instruementation profile log. It is also possible to program the meter to use set 1 and set 2 to record 4-quadrant energy values.

REX2 meters are available with an optional 200 A integrated service control switch. Based on significant field experience, the REX2 service control switch has been optimized to provide low contact resistance for increased life. REX2 meters support advanced demand limiting and lockout functionality, and switches may be operated by authorized utility personnel through the network or locally at the meter.


The REX2 meter uses full 128-bit AES encryption when communicating over the EnergyAxis network. The meter’s many status and error alerts are reportable though the network, quickly notifying the utility of possible meter tampering or energy theft.

The REX2 meter meets or exceeds the following American National Standards Institute (ANSI) and National Electrical Manufacturers Association (NEMA) standards for electricity metering:

  • ANSI C12.1 (2001)
    American National Standard for Electric Meters - Code for Electricity Metering
  • ANSI C12.10 (2004)
    American National Standard for Physical Aspects of Watthour Meters - Safety Standard
  • ANSI C12.19 (1997)
    American National Standard for Utility Industry End Device Data Tables
  • ANSI C12.20 (2002)
    American National Standard for Electricity Meters - 0.2 and 0.5 Accuracy Classes
  • NEMA SG-AMI 1-2009 (2009)
    Requirements for Smart Meter Upgradeability

EnergyAxis System

EnergyAxis is the most advanced and complete suite of smart grid solutions. Developed by Elster, the world's leader in smart metering, the EnergyAxis System architecture is the most interoperable smart grid communications solution available. With verified applications for demand response, distribution automation, outage detection/restoration, revenue protection, we know how to seamless integrate with almost any operation.

 

EnergyAxis is engineered on open standards, allowing us to interface with the greatest range of powerful third-party technologies and providing you with the widest choice of communication paths possible. Our unsurpassed interoperability enables us to partner with over 40 smart grid companies and apply all relevant technologies to meet your need, and they are proven to work.

 

Elster is committed to supporting utility initiatives in energy conservation. Through its open architecture, EnergyAxis is able to integrate with third party electric load control devices, demand-side management devices, in-home displays, and pre-payment services.

 

Visit the EnergyAxis Web site for more information on Elster's advanced metering infrastructure solutions.


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