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4 RS485 Modbus adapter
The RS485 Modbus adapter enables the connection of the controller to an RS485
Modbus network.
4.1 Main features
The adapter is self-powered through the power supply of the controller.
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Advantage: an external power supply is not needed.
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Advantage: low power consumption.
The adapter is fixed directly on the back side of the RVT.
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Advantage: the Modbus adapter does not need any rail DIN or such fixation
methods.
The adapter is electrically isolated from the RVT power supply.
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Advantage: the RVT is protected against common mode voltage levels applied on
the RS485 network.
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Advantage: no ground loop.
The adapter has an integrated terminator resistance which may be connected with a
switch.
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Advantage: no external device to be added.
The adapter contains transient voltage suppressors.
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Advantage: the device and the network are protected against voltage surges.
The adapter is fitted with transmission and reception indication LED's.
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Advantage: it allows visualizing Modbus queries and Modbus answers.
The controller allows a software adjustment of communication parameters.
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Advantage: no multiple hardware dipswitches to handle.
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Advantage: permits self-tuning of communication parameters with a higher level
software application.
4.2 Physical dimensions
The Modbus adapter is especially suitable for application where space requirements are
important.
RS485 ç RS485 Modbus adapter 9
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