MLN417 |
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The ML417 is one of the most flexible and powerful telemetry units you will find. The units are built in to an IP67 rated enclosure. An antenna is fitted to the main printed circuit board and an external antenna may be fitted if the units are to be used in locations with poor signal strength. |
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Multiple Input Channels: |
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Flexible power options |
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There are many ways in which you can power the YDOC units: |
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Pulse Inputs |
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The RTUs carry three pulse inputs which may be used to monitor pulse flow meters, rain gauges etc. Pulse inputs can be recorded as count over a unit of time, as a totaliser or as a rate. They may also be used to detect a change in the state of an event i.e. for alarming. |
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Serial Inputs |
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The Serial input may be used to connect to SDI-12, RS232 or RS485 sensors. This opens up the RTUs to use with an extremely wide variety of “smart sensors”. |
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Accessory Port |
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The Accessory Port (ADS model only) is used to connect to a variety of YDOC accessories (only 1 per RTU) : |
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Expansion Port |
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Although the MLN417 is packed with features, we know you can’t please everybody. There is no point in continuing to increase the RTU capacity if on 99% of jobs, the extra channels are not required. That is why the MLN417 is fitted with an expansion port in to which an additional board can be plugged. These are available with high resolution analogue input, bridge interface, 4-20 mA current interface and additional serial ports. Simply plug in the required board, enable it in the menu and connect your sensors.. The RTU’s capacity can be expanded by plugging in a small daughter boards (see below). Boards are available with high resolution analogue channels, additional serial ports, bridge interfaces etc and they can be stacked on top of one another. This approach means you are only paying for additional features as and when you need them. YDOC have chosen a very comprehensive set of “standard” functions which fit most use cases and now you have the flexibility to add extra inputs when you need them. The range of modules is growing continually and currently includes: |
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Communications |
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We provide cloud hosting services through Sensori and the data is sent via FTP from the YDOCs to that platform. But the units also support transfer via number of different mechanisms- and you can use more than one at a time. The choice includes; TFP, TCP, HTTP and MQTT. If you want to send the readings to your own server, then install YDOC’s TCP server module. It will collect the readings from the RTUs and also allow you to open a remote comms session for configuration and testing. The data can be downloaded in YDOC’s native format, in CSV format or in JSON format The RTUs can also send data to an FTP server or as an attachment to an Email. These transfers can be used in isolation or in tandem. |
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Calculated Channels |
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Once you have configured the RTU, you can then create new calculated channels which are based on the values of one or more of the existing channels. The calculation module supports a range of 1, 2 and 3 variable functions and can utilise any existing sensor as an input. |
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Alarms |
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Alarms may be set on the value of any of the internal or external sensor channel, or on the value of a calculated channel . Two levels of alarm are available for both low and high conditions. When an alarm is triggered the units may send an SMS to one or more recipients. Further alarms may be generated from within the Sensori software once the data reaches it |
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MQTT |
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MQTT (Message queuing telemetry transport) is an efficient, open protocol for exchanging sensor data. Clients (RTUs) which are attached to sensors, send data to a Broker, which subscribes to the message or data stream. Similarly applications can use MQTT to read in data for presentation to end users. MQTT has quickly become the protocol of choice in the rapidly growing Internet of Things (IoT) sector. By turning on the MQTT output option in the RTU you can now send your current or logged readings to any MQTT friendly application application be it one running on a Cloud Server or on your Smart Phone. |
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