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YDOC Remote Telemetry Units | ||
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| Your Data Our Care - YDOC | YDOC is a Netherlands based manufacturer of Telemetry products. The company is privately owned and invests heavily in R&D and continual product improvement. Their ML417 family of telemetry products offers excellent value, combining a small package with features usually only found on far more expensive top end units. |
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| ML417 |
The ML417 is the main-stay of YDOC's telemetry family. It is available in various configurations but we have chosen to standardise on the "ADS" model. This version offers a serial input for SDI-12/RS232/RS485-MODBUS, along with 3 pulse inputs and 4 analogue inputs (2 off 4-20mA and 2 off 0-10V). The ML417 units are built in to an IP67 rated enclosure but we also offer them in a larger 180x180 mm polycarbonate enclosure (allows a larger battery for energy hungry jobs). 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. For further details, check the MLN417 brochure. |
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| Expansion Port | 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: ML-OI-SDI: adds an extra SDI-12 ports: ML-OI-485: adds an RS485 port: ML-OI-AD-MV: adds 2 off 16 bit mV inputs ML-OI-AD-2V: adds 2 off 16 bit 0.25/0.5/1/2V inputs ML-OI-AD-10V: adds 4 off 0-10V analogue channels ML-OI-BP: Barometric pressure sensor for level sensor compensation ML-OI-BLE: Bluetooth LE board to enable programming and download via Bluetooth to your PC or smartphone ML-OP-524: Expansion board to provide additional switched sensor power ML-OI-DX: adds 4 off pulse/digital channels ML-OI-AX-DSB18B20: for connection of up to 4 1 Wire DSB18B20 thermistors ML-OI-AX-RH: for connection of a 1 wire relative humidity sensor ML-OI-COM-RS232: for connection of a GPS when the Accessory port is already in use ML-OI-COM-RS485: provides an additional RS485 port ML-OI-SDI: provides an additional SDI-12 port ML-OA-RS232: provides an additional RS232 port for a camera ML-OI-WIFI: allows the RTU to send data via a local WiFi network rather than using a mobile/cellular connection ML-OO-MOBUS: allows the RTU to send data to an on site SCADA system ML-OO-SW: adds 4 off solid state switch outputs ML-OC-W2P: Waveform to pulse converter for connection to flow meters and anemometers which have a coil/frequency output. |
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| Calculated Channels | 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. There are also occasions where you will need to perform aggregation, for example when calculated average, maximum and minimum wind speeds. To this end, the RTUs also support Aggregated channels. Simply select the input channel, choose the scanning period and then decide on the calculations you wish to perform. The aggregated values then become available as saved channels. |
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| Communications Options | 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, MQTT, Email and Microsoft Azure. 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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| MQTT and JSON | 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. JSON is a data format which has been widely adopted amongst the IoT community. The YDOC units can export data in JSON format, making them compatible with a wide range of modern hosting platforms. |
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| YDOC WiFi | In recognition of the ever growing adoption of WiFi as the base for local area networks (LANs), YDOC offers an expansion board which holds a WiFi Modem. This allows you to connect using any 2.4GHz WiFi network, saving on SIM charges. The WiFi expansion board may be fitted to the standard ML417 or the cheaper ML017. |
