Description
2.3 Different properties for devices with other hardware
SCALANCE W788-xPRO/RR / SCALANCE W74x-1PRO/RR
Operating Instructions (Compact), Release 08/2007, A5E00413342-05
79
Assignment of the power wires with a hybrid cable 2 x 2 + 4 x 0.34
Wire color code (standard) Brown Brown Black Black
Function 24 V 24 V Ground Ground
Power supply insert module 1 2 3 4
Assignment of the power wires with an IE FC TP standard cable 4 x 2 GP
Wire color code (standard) White / blue
(1)
Blue White / brown
(1)
Brown
Function 24 V 24 V Ground Ground
Power supply insert module 1 2 3 4
(1)
White wire of the pair
Earthing
CAUTION
Damage to the device due to potential differences
There must be no potential difference between the following parts otherwise there is a risk
that the device will be destroyed:
• Ground potential of the power supply and ground potential of the antenna ground.
• Ground potential of the power supply and a grounded housing.
• Ground potential of the power supply and the ground potential of the device connected
to Industrial Ethernet (for example PC, AS-300, AS-400 etc.).
Connect both grounds to the same foundation earth or use an equipotential bonding cable.
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