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-US
Figure 27: 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
en03000110.vsd
1
2
IEC03000110 V1 EN-US
Figure 28: Cable contact, Phoenix: MSTB2.5/6-ST-5.08 1757051
Where:
1
is cable
2
is screw
Section 6
1MRK 514 027-UEN D
Connecting
44
650 series
Installation manual
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