PROFIBUS USER MANUAL Leine & Linde AB
Part Id: 740590-01
15
Document Id: 740590 Ver. 01
Publication date: 2010-06-01
3.2.1 BUS lines
The PROFIBUS bus line connections of the M12 equipped devices are constituted by a
male B-coded 5 pin M12 connector (bus in), and a female B-coded 5 pin M12 connector
(bus out).
Picture 10 Orientation of M12 bus connectors
The cable gland encoders shall be equipped with twisted pair shielded cable in
accordance with EN 50170 and PROFIBUS guidelines. The guidelines recommend a
conductor area higher than 0,34mm
2
. Permissible outer cable diameter is ø 8 mm to ø
10 mm for the bus line cables. Located inside the back cover are four screw terminals
containing the required bus line terminals marked (A) and (B).
Cable glands not used
should be replaced with a filler plug to ensure proper sealing. The filler plug is
available as an accessory from Leine & Linde.
The (A) terminal shall be used to connect the A-line.
The (B) terminal shall be used to connect the B-line.
Picture 11 Terminal connection of bus line cables
Note:
Tighten all screws in the terminal, even if no cable has been attached.
Note:
The two A-terminals are internally connected to each other and the two B-
terminals are also internally connected to each other so it does not matter to
which terminal the bus lines are connected to.
3.3 Shielding philosophy
To achieve the highest possible noise immunity and resistance against other EMI
related disturbances the bus and power supply cables shall always be shielded.
The screen should be connected to ground on both ends of the cable. In certain cases
compensation current might flow over the screen. Therefore a potential
compensation wire is recommended.
Bus in- lines
Bus out- lines
Function Pin Function Pin
Not connected
1 VP 1
A 2 A 2
Not connected
3 DGND 3
B 4 B 4
Chassi 5 Chassi 5
Table 8 Pinning M12 bus in/out – lines
Bus out
Bus in