МBnano-10 starts to operate immediately after connecting
the USB cable to it. The algorithm of work is as follows:
Starting initialization mode (0.2-0.3 s)
For about 0.2-0.3 s the device is busy with initialization
of important parameters. During initialization the output
is forbidden and the output voltage is 0 V. Output becomes
active, the unit then measures current consumption of the
connected slaves. Led ‘OUT' (allowed output/transmit)
become active. If short circuit, the output is held forbidden
and after a few second a new check is done, while led ‘OUT’
are turned off.
Normal operation mode
Continuously the unit measures current consumption of the
connected slaves. If the consumed current becomes higher
than 35 mA, the led 'OUT' becomes red. If the consumed
current becomes higher than 45mA, the output is forbidden
and turned off. MBnano-10 is a dedicated
bridge for the connection between computer and slave m-bus devices.
The data is transmitted immediately, without delay. When
a slave device is sending information, this data is first
decoded according to RS-232 protocol and then send via USB
serial port, with no delay. It is possible simultaneously
to transmit/receive data. If collision (two or more slave
devices send instantly) data is still transmitted via the USB
interface.
To save power, if more than 20 minutes device stays idle - power is shut down to save USB consumption.
On first received telegram MBnano-10 will wake up, but first telegram will be lost sue to initialization time.
This smart function can be turned off with manufacturer specific command from USB port.
This devices is generally intended for engineers, who in some cases
need to easy set-up m-bus devices, which are already installed. Each MBnano-10 comes
with 1m USB cable A-to-B. USB drivers needed are FTDI drivers and can be downloaded freely.
Any m-bus software can be used with our MBnano-10.
