Mounting and Commissioning
3.2 Checking Connections
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
255
Protection Data Interfaces - Copper
Connect the copper protection data interfaces (electrical) to terminal block D using copper conductors.
Fiber-optic Cables
WARNING!
Laser Radiation!
Do not look directly into the fiber-optic elements!
Signals transmitted via optical fibers are unaffected by interference. The fibers guarantee electrical isolation
between the connections. Transmit and receive connections are represented by symbols.
The standard setting of the character idle state for the optical fiber interface is „Light off“. If the character idle
state is to be changed, use the operating program DIGSI as described in the SIPROTEC 4 System Description.
3.2.2 Checking the Protection Data Communication
The protection data communication usually goes directly from device to device either via electrical connection
or optical fiber.
Optical Fibers, Directly
WARNING!
Warning of laser rays!
Non-observance of the following measure can result in death, personal injury or substantial property damage.
Do not look directly into the fiber-optic elements, not even with optical devices! Laser Class 3A according to
EN 60825-1.
The direct optical fiber connection is visually controlled by means of an optical fiber connector. There is one
connection for each direction. Therefore the output of the one device must be connected to the input of the
other device and vice versa. Transmission and receiving connections are identified with the symbols for
transmit and for receive. Important is the visual check of assignment of the transmitter and reception
channels.
Further Connections
For further connections a visual control is sufficient for the time being. Electrical and functional controls are per-
formed during commissioning (see the following main section).
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