Preface; Structure Of The Interface Board; Repeater Feature - Drehmo i-matic Operating Manual

2 Preface

2.1 Structure of the interface board

The MODBUS interface board DiM-17 is equipped with two galvanically separated autonomous
RS485 interfaces. In conjunction with the integrated powerful controller a reapeater functionality is
given. This allows to extend the RS485 communication over larger distances.
In addition the board is equipped with a relay which connects the attached segments in case of a
loss of the repeater functionality to increase the availability.

2.2 Repeater feature

The repeater within each interface separates the network into segments. Each connection
between two actuators can therefore be seen as a single point to point connection. The repeater
reconditions the MODBUS signal with a delay of 0.5 tBit.
DREHMO – i-matic Modbus loop redundant board page 6 of 32
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