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AmsSevernTrent

  • Severn Trent Water Meter Interface

    The AmsSevernTrent module is a client interface module in the Amplex Module System. It is designed for two-way communication with Severn Trent compatible utility meters. The AmsSevernTrent module can easily be connected with up to ten utility meters.

    The AmsSevernTrent module collects readings and other data from the meters and subsequently transfers these data to an AmsCPU/AmsCPU-IO module that acts as a data concentrator and WAN module. The AmsCPU module delivers the data to the central server when required. Direct communication and power supply between the AmsSevernTrent module and the AmsCPU module are handled by an incorporated A-Bus interface, which is based on the industrially proven RS-485 technology.

    • A-Bus two-way communication with A-Bus masters, e.g. AmsCPU, AmsCPU-IO
    • The interface of the AmsSevernTrent module was designed for Severn Trent SM150E smart meters. Severn Trent SmartMeters has been acquired by Elster. Elster uses the same interface for all their smart water meters.
    • The module is automatically discovered by the AmsCPU module. In case a module is disconnected from the AmsCPU module, this is reported to the server application and the module is listed as missing. If the module is reconnected to the AmsCPU module or another AmsCPU module, it will be rediscovered by the system.
    • The real-time clock is automatically synchronized with the AmsCPU module which in turn is synchronized with the Network Time Protocol (NTP).
    • AMS Status LED (green): indicates whether the A-Bus is up and running.
    • The software on the AmsSevernTrent module can be updated remotely from the central server.
    • New software is transferred without interrupting the normal functionality of the AmsSevernTrent module. When the software has been transferred, the integrity of the software is checked and the software is installed.
    • A built-in self-test (BIST) is performed after power-up.
    • Watchdog and brown-out reset ensure that the system is up and running at all times.

    • A-Bus client module
    • Up to 10 water meters. Three terminals for each water meter: one for data requests, one for data input and one for ground.


Supported Meters


Manufacturer Model Protocol Interface
Manufacturer Model Protocol Interface
Elster Q050 Severn Trent AMS Severn Trent
Severn Trent SM150E Severn Trent AMS Severn Trent
Manufacturer Model Protocol Interface
Manufacturer Model Protocol Interface
Manufacturer Model Protocol Interface

More meters can be supported using add-on AMS modules – see full list of supported meters, interfaces and protocols here.

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