Instructions

Intesis

Modbus Server – M-Bus User Manual r1.4 EN

This information is subject to change without notice

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Powering the device

A power supply working with any of the voltage range allowed is needed (check section 6). Once connected the RUN

led (Figure above) will turn on.

WARNING! In order to avoid earth loops that can damage the gateway and/or any other equipment connected to it,

we strongly recommend the use of DC power supplies, floating or with the negative terminal connected to earth.

Never use a DC power supply with the positive terminal connected to earth.

Connection to M-Bus

Connect the M-Bus bus to connectors A3 (+) and A4 (-) of gateway’s PortA.

Remember that the Intesis provides 36VDC M-Bus voltage to the bus, acting as a M-Bus level converter as well.

In case there is no response from the M-Bus device(s) to the frames sent by Intesis, check that they are operative

and reachable from the network connection used by Intesis. You can use an EIA-485-to-USB converter and a M-Bus

Master software (such as MBSheet or similar) to double check the M-Bus installation.

Connection to Modbus

4.3.1 Modbus TCP

Connect the communication cable coming from the Modbus TCP Master to the Ethernet port of Intesis. The cable to

be used shall be a straight Ethernet UTP/FTP CAT5 cable.

4.3.2 Modbus RTU

In case of using an EIA485 connection, connect the communication cable coming from the Modbus network to the

port marked as Modbus of Intesis. Connect the EIA485 bus to connectors B2 (+), B1 (-) and A1 or A2 (SNGD) or to

connectors B1 (-), B2 (+) and B3 (SNGD) of gateway’s PortB. Respect the polarity.

Remember the characteristics of the standard EIA485 bus: maximum distance of 1200 meters, maximum 32 devices

connected to the bus, and in each end of the bus it must be a termination resistor of 120 Ω. The gateway has an

internal bus biasing circuit that incorporates the termination resistor. If you install the gateway in one of the ends of

the bus, then do not install an additional termination resistor in that end.

In case of using an EIA232 connection, connect the serial cable EIA232 coming from the external serial device to the

EIA232 connector of gateway’s PortB. This is a DB9 male (DTE) connector in which only the lines TX, RX and GND

are used. Details of the pinout can be seen in the user's manual. Respect the maximum distance of 15 meters.

Connection to the configuration tool

This action allows the user to have access to configuration and monitoring of the device (more information can be

found in the configuration tool User Manual). Two methods to connect to the PC can be used:

• Ethernet: Using the Ethernet port of Intesis.

• USB: Using the console port of Intesis, connect a USB cable from the console port to the PC.