Siemens SIPROTEC 6MD665, Manual

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3 Installation and Commissioning
114
6MD665 Manual
C53000-G1876-C103-3
Table 3-7 D-subminiature connector assignment of the time synchronization interface
1)
assigned, but not used
3.2.7 Optical Fibers
WARNING!
Warning of Laser rays!
Non–observance of the following measure can result in death, personal injury or sub-
stantial property damage.
Do not look directly into the fibre-optic elements!
Signals transmitted via optical fibers are unaffected by interference. The fibers guar-
antee electrical isolation between the connections. Transmit and receive connections
are shown with the symbols for transmit and for receive.
The normal setting of the character idle state for the fibre optic cable interface is "Light
off". If the character idle state is to be changed, use the operating program DIGSI
®
, as
described in the SIPROTEC
®
system description /1/.
3.2.8 Checking Power System Connections
Before the device is energized for the first time, the device should be in the final oper-
ating environment for at least 2 hours to equalize the temperature, to minimize humid-
ity and avoid condensation. Connections are checked with the device at its final loca-
tion. The plant must first be switched off and grounded.
Pin No. Designation Signal Meaning
1 P24_TSIG Input 24 V
2 P5_TSIG Input 5 V
3 M_TSIG Return Line
4 –
1)
–
1)
5 Shield Shield Potential
6 – –
7 P12_TSIG Input 12 V
8 P_TSYNC
1)
Input 24 V
1)
9 SHIELD Shield Potential