3 Mounting and Commissioning
288
7SD610 Manual
C53000-G1176-C145-4
Optical Fibres
WARNING!
Do not look directly into the fibre-optic elements, not even with optical devices! Laser
class 1 according to EN 60825-1.
For the protection data communication, refer to the following section.
The transmission via fiber optics is particularly insensitive to electromagnetic interfer-
ence and thus ensures galvanic isolation of the connection. Transmit and receive con-
nections are shown with the symbols for transmit and for receive.
The character idle state for the optical fibre interface is „Light off“. If the character idle
state is to be changed, use the operating program DIGSI, as described in the SIPRO-
TEC 4 System Description.
3.2.2 Checking the Protection Data Communication
The protection data communication is conducted either directly from device to device
via optical fibres or via communication converters and a communication network or a
dedicated transmission medium.
Optical Fibres, Di-
rectly
WARNING!
Warning of Laser rays
Do not look directly into the fibre-optic elements, not even with optical devices! Laser
class 1 according to EN 60825-1.
The direct optical fibre connection is visually inspected by means of an optical fibre
connector. There is one connection for each direction. The data output of one device
must be connected to the data input of the other device and vice versa. Transmission
and receiving connections are identified with the symbols for transmit and
for receive. The visual check of the assignment of the transmission and reception
channels is important.
For short distances, laser class 1 is fulfilled if FO5 modules and the recommended
fibres are used. In other cases, the laser output may be higher.
Communication
Converter
Optical fibres are usually used for the connections between the devices and commu-
nication converters. These are checked as the direct optical fibre connections.
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