3
ELECTRICAL CONNECTIONS
12
MFC 400
www.krohne.com
12/2017 - 4006097501 - AD MFC 400 Profinet R01 en
3.4.4 Assembly of the terminals with PROFINET IO
The PROFINET IO device will be equipped with either one or two external M12 connectors.
For details refer to
Overview of the PROFINET IO M12 connectors
on page 10.
The internal connection of the M12 connectors to the screw terminal is presented in the
following table.
3.5 Topology of PROFINET IO networks
3.5.1 Point-to-point or star topology
Devices in this topology have only one connection to the control system (point-to-point) or to an
Ethernet switch (star).
Connection terminals
A
A-
A+
B
B-
C
C-
D
D-
PROFINET IO
Port 2
Port 1
100BASE-TX
RX+
RX-
TX+
TX-
TX+
TX-
RX+
RX-
EIA/TIA 568A
1
white/
orange
orange
white/
green
green
white/
green
green
white/
orange
orange
EIA/TIA 568B
1
white/
green
green
white/
orange
orange
white/
orange
orange
white/
green
green
2-pair/ star-quad
2
white
blue
yellow
orange
yellow
orange
white
blue
Table 3-6: Terminal connection of PROFINET IO
1
If used with 4 pair wires, leave unused pairs unconnected
2
Specified in PROFIBUS Nutzerorganisation e.V., "PROFINET Cabling and Interconnection Technology - Guideline for PROFINET v3.1"
INFORMATION!
Devices in this network topology only need one Ethernet port.
Devices with two Ethernet connectors can still be used (for details refer to Overview of the
PROFINET IO M12 connectors on page 10
).
Figure 3-3: Point-to-point or star topology