The general technical characteristics that characterize the Rilheva-MQTT device are the following:
- 8 current/voltage selectable 16-bit analog inputs (0-20mA/0-10V) (with common reference). Sampling >1Hz
- 8 optoisolated digital inputs (with common reference) pulse count or time count. 1kHz sampling, 64-bit counters.
- 3 relay outputs (non-exchange contacts).
- RS-485 interface with MODBUS master protocol.
- implemented protocol MODBUS RTU half duplex.
- direct connection (without repeaters) of 32 different slave peripherals.
- maximum management of 60 different slave peripherals (with repeaters).
- handling of 300 Modbus tags in total (max 32-bit).
- json data structure and MQTT data sending.
- periodic sending of the acquired data.
- handling threshold and offset alarms with sending.
- management counts impulses and time counters.
- Rilheva-MQTT firmware remote reprogramming using FTP servers.
- output for auxiliary power supply 15V@200mA and 5V @200mA sensors for RS-485 bus.
- device fully controlled remotely by GSM/GPRS/LTE data connection.
- data-logger management of data acquired and not yet sent to the server.
- hour maintaining without power supply.
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