2.6 Wiring examples
Cable connection
The bus line also carries power and is
connected as follows:
•
Switch off power
•
If necessary, connect external ground
terminal to plant grounding system.
•
Unscrew the connection compartment
lid.
•
Thread cable through cable entry.
•
Connect cable cores to FF+ and FF–.
Reversed polarity has no effect on
operation.
•
Connect the screen to the internal
ground terminal
•
Screw down the connection
compartment lid.
7/8" plugThe Cerabar S Foundation Fieldbus version with 7/8" plug is supplied ready wired and
need only be connected to the FF H1 bus by means of a suitable cord set.
Note!
To protect the device against vibrations, always connect the Cerabar S to the T-piece or
to a FF junction box via cable. See Figure, bottom right.
•
Push connector into the socket.
•
Securely tighten the knurled screw.
•
Ground the device and T-piece or FF junction box using the grounding system
selected.
FF–
FF+
1
2
3
+
0004
Foundation Fieldbus
FF FF
ground terminal
on housing:
to be grounded!
connection
compartent
BA211Y24
Note!
–
+
1 2 3
12
3
Cerabar S
FF+
not
connected
Screen
7/8" plug
Foundation Fieldbus
FF–
BA211Y64
7/8" plug, view looking onto the pins
T-piece
cable with
7/8" plug
BA211Y65
e.g.T-piece
Cerabar S FF 2 Installation
Endress+Hauser 15
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