Checking The System Connections - Siemens SIPROTEC 4 7UT6 Series Manual

Pin No. Designation
8
P_TSYNC
9 SCREEN
1) assigned, but not used
Fibre-optic Cables
!
WARNING
Laser rays!
Do not look directly into the fiber-optic elements!
²
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 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 SIPROTEC 4 System Description.
RTD box
If one or two RTD-boxes 7XV5662-xAD are connected for considering the coolant temperature when using
overload protection with hot-spot calculation, check their connection at the service interface (Port C) or the
auxiliary interface (Port D).
Also verify the termination. The terminating resistors must be connected to the device (see margin
heading"Termination").
For further information refer to the operating manual of 7XV5662-xAD. Check the transmission settings at the
temperature meter. Besides the baud rate and the parity, the bus number is also important.
For connection of RTD-box(es) proceed as follows:
•
For connection of 1 RTD-box 7XV5662-xAD:
Bus number = 0 with Simplex transmission (to be set at 7XV5662-xAD),
Bus number = 1with Duplex transmission (to be set at 7XV5662-xAD).
•
For connection of 2 RTD-boxes 7XV5662-xAD:
Bus number = 1 for the 1st RTD-box (to be set at 7XV5662-xAD for RTD 1 to 6),
Bus number = 2 for the 2nd RTD-box (to be set at 7XV5662-AD for RTD 7 to 12).
3.2.2

Checking the System Connections

Before the device is energized for the first time, the device should be in the final operating environment for at
least 2 hours to equalize the temperature, to minimize humidity and avoid condensation. Connections are
checked with the device at its final location. The plant must first be switched off and grounded.
!
WARNING
Warning of dangerous voltages
Non-observance of the following measures can result in death, personal injury or substantial prop-
erty damage.
Therefore, only qualified people who are familiar with and adhere to the safety procedures and
²
precautionary measures shall perform the inspection steps.
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
Signal significance
1) Input 24 V
Screen potential
Mounting and Commissioning
1)
3.2 Checking Connections
351