Rs485 Modbus Adapter; Main Features; Physical Dimensions - ABB RS485 Installation And Startup Manual

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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The adapter is fixed directly on the back side of the RVT.
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The adapter is electrically isolated from the RVT power supply.
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The adapter has an integrated terminator resistance which may be connected with a
switch.
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The adapter contains transient voltage suppressors.
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The adapter is fitted with transmission and reception indication LED's.
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The controller allows a software adjustment of communication parameters.
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4.2 Physical dimensions

The Modbus adapter is especially suitable for application where space requirements are
important.
10 – RS485 Modbus adapter  RS485
Advantage: an external power supply is not needed.
Advantage: low power consumption.
Advantage: the Modbus adapter does not need any rail DIN or such fixation
methods.
Advantage: the RVT is protected against common mode voltage levels applied on
the RS485 network.
Advantage: no ground loop.
Advantage: no external device to be added.
Advantage: the device and the network are protected against voltage surges.
Advantage: it allows visualizing Modbus queries and Modbus answers.
Advantage: no multiple hardware dipswitches to handle.
Advantage: permits self-tuning of communication parameters with a higher level
software application.