MBET-2 is powered by external adapter 6-9 Vac/200 mA or 5-12 Vdc/200mA. The central pin of
the power connector is 2mm thick. We recommend adapter with power rating 6-12 Vdc/5W.
Power supply voltage should not exceed 20 Vdc/ 15 Vac.
МBET-2 begins operation immediately after power-up. After
initialization (about 2s), MBET-2 enters “Command
mode” /checks for connection time/. The connection
with servers is initiated by MBET-2 (client), i.e. MBET-2
can be connected in local network without real static IP-address.
All of the contacted servers must have static real IP-addresses
in order for MBET-2 to be able to connect to them. MBET-2
can contact up to six servers – two “control”
operators and four “data” operators. The two
control servers can program all network access settings
and have no access to the transmitted data. Likewise, the
data operators can access only the data, but cannot program
any network parameters. If it is needed for an operator
to have access both to the network settings and the data,
its IP-address must be set both as control and data operator.
Accessible mediums for every data operator may be programmed,
so, for example, the operator which monitors water consumption,
cannot access the data, monitored by gas supplier and vice-versa.
MBET-2 tries to connect to the servers after predetermined
period of time (default 1h). Each of the servers can accept
or reject the incoming connection. If the connection is
accepted, MBET-2 starts with identification data packet
to identify the remote reading network, connected to this
particular MBET-2. After identifying the network server
can reprogram network parameters (for control operators)
or access network data (data operators). When all parameters
are programmed or needed data is read, server must send
TCP packet for closing the connection. After receiving this
packet, MBET-2 closes the connection and tries to connect
to the next server in the list until all the servers in
the list are contacted. If no close connection packet is
send or MBET-2 cannot connect to the server, it waits for
predetermined period of time and closes the connection,
if no data exchange occur. This process is repeated continuously,
connection attempts are programmable period of time.
Initial parameters programming is essential and includes setting the LAN/WAN-network parameters
(IP-address, gateway IP-address, network mask, IP-address of the control server, etc, including setting
new MAC-address if MAC-conflict occurs) and remote reading network parameters (baud rate and parity of
serial connection, remote reading network number). These parameters must be set first via RS-232 port,
and after successful connection all the parameters can be set remotely by the server, if needed.
All the connectors of MBЕТ-2 are at the back of the device - these are Power supply, RS-232 port and
LAN connector. The cable, connecting MBET-2 to an m-bus converter type MBRS (RS-232 RJ45-RJ45 cross) is part of
the package. The cable for initial programming (RS-232 DB9-RJ45 cross) is not delivered with MBET-2 as it is part
of the package of every m-bus converter type MBRS.
