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hardware:wattmons:wattmonmega_intro [2018/09/05 12:31] jeff Deleted Standards Compliance section |
hardware:wattmons:wattmonmega_intro [2021/09/13 05:57] (current) |
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======WattmonMEGA Overview====== | ======WattmonMEGA Overview====== | ||
- | {{20170525_wattmonmega.png? | + | {{20170525_wattmonmega.png? |
=====Wiring and Connections Diagram===== | =====Wiring and Connections Diagram===== | ||
- | {{20170525_wattmonmega_topview_diagram_20180902_edited_screenshot_from_datasheet_.jpg|Topview Connection Diagram (WattmonMEGA)}} | + | {{: |
=====Power Requirements===== | =====Power Requirements===== | ||
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=====Connectivity===== | =====Connectivity===== | ||
- | WattmonMEGA has two ways of connecting to the Internet. The built-in LAN can be connected directly to a laptop or router, and is used for setup and local monitoring (but can also be used for remote monitoring if the site has an Internet connection). The USB Host port works with a selected number of USB Cellular dongles (GPRS and 3G), allowing both outbound and inbound data via the Internet. Although we provide instructions on configuring your local dongle, not all of them work. Need a compatible USB dongle for remote monitoring? Use one of our Huawei dongles, the [[hardware:accessories: | + | WattmonMEGA has two ways of connecting to the Internet. The built-in |
=====Hardware Features===== | =====Hardware Features===== | ||
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====Serial (RS-232)==== | ====Serial (RS-232)==== | ||
- | An [[how_tos: | + | An [[how_tos: |
+ | {{: | ||
====Modbus RTU (RS-485)==== | ====Modbus RTU (RS-485)==== | ||
- | An industry compliant RS-485 Modbus RTU interface is built in and the Wattmon acts as a Modbus master to collect data from various devices such as inverters, power meters, current sensors, etc. Up to 8 Modbus RTU-compliant slave devices and 10 Modbus TCP devices can be daisy-chained to the interface, and the Modbus can be configured for any baud rate up to 115200 with different parity settings as required. | + | An industry compliant RS-485 Modbus RTU interface is built in and the [[hardware: |
- | If you are planning to monitor a battery bank with the Wattmon, you will require a current sensor device such as the [[hardware: | + | {{: |
+ | |||
+ | If you are planning to monitor a battery bank with the [[hardware: | ||
See [[hardware: | See [[hardware: | ||
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The inputs and outputs and their various applications are described below. | The inputs and outputs and their various applications are described below. | ||
- | ===4 digital | + | ===4 Digital |
Pins 16-19 are digital inputs. They are opto-isolated and can handle anywhere between 4 and 24V DC between the input pin and the DIGND pin. Pins 16-18 (DI1-DI3) can also be configured as pulse/ | Pins 16-19 are digital inputs. They are opto-isolated and can handle anywhere between 4 and 24V DC between the input pin and the DIGND pin. Pins 16-18 (DI1-DI3) can also be configured as pulse/ | ||
- | ===4 digital | + | ===4 Digital |
These are open collector type (using a ULN2003 chip) and can be directly connected to 12V relays (with external power supply) to control high power loads - they can handle up to 500mA per pin. | These are open collector type (using a ULN2003 chip) and can be directly connected to 12V relays (with external power supply) to control high power loads - they can handle up to 500mA per pin. | ||
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===OneWire Bus=== | ===OneWire Bus=== | ||
- | WattmonMEGA has a Dallas OneWire bus that allows for DS18B20 temperature sensors to be connected. This can be used for ambient or battery temperature measurement. You can connect up to 8 sensors per device. | + | WattmonMEGA has a Dallas OneWire bus that allows for DS18B20 temperature sensors to be connected. This can be used for ambient or battery temperature measurement. You can connect up to 8 sensors per device. |
+ | |||
+ | {{:hardware:wattmons: | ||
====Storage==== | ====Storage==== | ||
- | A removable/ | + | A removable/ |
WattmonMEGA has 512 KB RAM (enough space for about 200 KB of added user variables and scripts). | WattmonMEGA has 512 KB RAM (enough space for about 200 KB of added user variables and scripts). |