External
Equipment (PC)
PE 1) 3)
2)
IED
1
6
5
4
3
2
X1
4)
Cc
4)
IED
X1
1
6
5
4
3
2
1)
1)
Cc
IEC13000230-1-en.vsd
3)
IEC07000142 V2 EN
Figure 49:
Communication cable installation, 4-wire
Where:
1
The inner shields shall be connected together (with an isolated terminal block) and only have
one connection point in the whole system, preferably at the external equipment (PC).
The outer shield shall be connected to the IED chassis in every cable end. Use the shield
connection clamp at all IEDs. The first IED will have only one cable end but all others require
two.
2
Connect according to installation instructions for the actual equipment, observe the 120 ohms
termination.
3
Connect the screens according to the installation instructions for the actual equipment.
4
Shield connection clamp, see Figure
Cc
Communication cable
Section 6
1MRK514019-UEN A
Connecting
76
670 series 2.0 IEC
Installation manual
Содержание Relion 670 2.0 IEC Series
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