22
SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
Connections of the LPCT and LPVT Terminals via RJ45
Fixing Elements
Connector Type:RJ45 plug connector as per IEEE 802.3
Cables:
CAT 5 (shielded twisted-pair, Siemens recommends
at least SF/UTP)
Figure 4 4 x RJ45 LPCT/LPVT connections
Assignment of the RJ45 socket F1 to F3 (with voltage transformer)
Assignment of the RJ45 socket F1 to F4 (without voltage transformer)
Pin-No.
1
2
3
4
5
6
7
8
RJ45 Ix_S1
Ix_S2
Ux_a
Ux_n
Ux_a
Ux_n
Ix_S2 Ix_S1
Pin-No.
1
2
3
4
5
6
7
8
RJ45 Ix_S1
Ix_S2
–
–
–
–
Ix_S2 Ix_S1
NOTE
You should use a cable tie to fasten the 4 connecting lines approx. 10 cm
after the RJ45 sockets.