Pepperl+Fuchs KFD HM 16 Series Manual page 21

HART Multiplexer System KFD*-HM*-16
Installation
CORRECT: Device snapped on vertically.
Power supply via
Power Rail
Attention
As shown in the figure, the isolation modules are snapped onto the Universal Power
Rail in a vertical downward movement.
Figure 4.4
There are two power supply concepts for supply via the Power Rail:
• single supply with the KFD2-EB2 power supply module
• redundant supply with two KFD2-EB2.R4A.B power supply module
Interchangeable
fuse
Figure 4.5
Redundant supply of the Power Rail with two power supply modules offers increased
availability of device power. In this construction, not only the power supply is
redundant, but also the fuse and the feed points on the Power Rail are provided
twice. If one of the two mains fails, the second supply ensures continued operation of
the system free of interruption. The malfunctioning power module indicates the error
over a potential-free contact.
In conjunction with Power Rail the power supply to the interface modules is only
permissible via a power feed module!
INCORRECT: Device snapped on from the side.
Supply module 1
Power Rail
Power supply 1
Supply module 2
Power supply 2
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