ABB RELION 670 Series Installation Manual page 76

Section 6
Connecting
1 2
X1
IEC07000142 V2 EN-US
Figure 49: Communication cable installation, 4-wire
Where:
1
2
3
4
Cc
1
IEC03000110 V1 EN-US
Figure 50: Cable contact, Phoenix: MSTB2.5/6-ST-5.08 1757051
Where:
1
2
70
Cc
3 4 5 6
IED
4)
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.
Connect according to installation instructions for the actual equipment, observe the 120 ohms
termination.
Connect the screens according to the installation instructions for the actual equipment.
Shield connection clamp, see Figure 30.
Communication cable
is cable
is screw
Cc
1)
1)
1 2 3 4 5 6
X1
IED
4)
2
en03000110.vsd
1MRK514024-UEN A
2)
External
Equipment (PC)
3)
IEC13000230-1-en.vsd
PE 1) 3)
Installation manual