Drehmo i-matic Installatie- en bedieningshandleiding - Pagina 15

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Supplement operating manual for DREHMO i-Matic actuators with integrated

MODBUS fieldbus interface

2.5.1.4

Interface with fibre optic connection

Actuators for ordinary surroundings (Non EX) may have an extended compact plug to incorporate a special

fibre optic interface board. The connection of the fibre optic cables to the interface board is shown in the

following picture:

Fibre optic connection inside the compact plug

The connector for the fibre optic wires is the one of type F-St. The core of the optical fibres might be of

diameter 50µm or 62.5 µm. To connect the fibre optic cables, open the cover of the extended compact plug.

Using the maximum of four cable glands (M20x1.5) the cables can be inducted into the housing. Connect the

optical fibres to the appropriate plugs: Connect the output of a device with the input of the other one and the

input with the output. The board provides an active connection between inputs and outputs. By default the

converter board is powered by the electronic unit. Thus in case of a power failure the communication to the

rest of the slaves connected to the output of the device is lost. This effect can be avoided by additionally

powering the electronic unit with external 24 V DC

Wenden, 21.03.12

Page 15 of 18

Prepared by: Ste