To maximise access to a 2G signal, GX Site Gateway devices are fitted with a multi-network data SIM that roams automatically to locate the best signal. Initially, the range consists of two products: the GX30 has three inputs for metering and monitoring applications, while the GX42 has two relay outputs in addition to four inputs and adds battery back-up to enable alarming in power fail conditions. These will be joined soon by the GX20, which is a battery powered IP67 version for external gas and water metering where there is no local power supply. The GX30 and GX42 are DIN rail mounting in a compact housing that includes a 230V power supply to minimise the time and cost of installation.
Flexible inputs
Integrated flexible inputs can be configured to accept either analogue sensors, digital status, meter pulses and a Modbus serial network. If the latter option is taken, up to 32 Modbus devices can be supported.
Meter and other data is logged in the GX unit and transmitted to the WEMS Energy Bureau Services team, via the internet (data is exportable in .CSV format). From here, it is possible to remotely manage the energy profile of each remote site in the estate. Both the GX30 and GX42 come complete with an external antenna.
International operation
The default configuration enables GX Site Gateway devices to operate internationally without the need to amend any settings, although units can be configured remotely depending on specific site requirements. As a point of note, monthly data connection charges are higher for non-UK applications, unless a local SIM is sourced. WEMS can fit these before product delivery.
The GX range is suitable for a wide range of simple metering applications, while the GX42 is ideal for standby generator switching or other simple scheduled control applications. For more complex metering or control tasks, users are advised to take advantage of the WEMS IX Site Manager range with wireless I/O modules.
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