Hitachi 670 Series Installation Manual page 76

Section 6
Connecting
1 2 3
X1
IED
ANSI07000142 V1 EN-US
Figure 44:
Where:
1
2
3
4
Cc
1
IEC03000110 V1 EN-US
Figure 45:
Where:
1
2
70
Cc
4 5 6
PG
Communication cable installation, 4-wire
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 32.
Communication cable
Cable contact, Phoenix: MSTB2.5/6-ST-5.08 1757051
is cable
is screw
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Cc
1)
1)
1 2 3 4 5 6
X1
IED
PG PG
2
en03000110.vsd
1MRK514026-UUS Rev. P
2)
External
Equipment (PC)
PG 1) 3)
en07000142_ansi.vsd
Installation manual
670 series