26
Manual – MOVI-PLC® advanced DHE41B/DHF41B/DHR41B Controller
4
Installing the MOVI-PLC® advanced DHF41B controller
Mounting/Installation Instructions
4.4.2 PROFIBUS connection (connector X30P)
Connection to the PROFIBUS system takes place using a 9-pin sub D plug according to
IEC 61158. The T-bus connection must be made using a plug with the corresponding
configuration. The following figure shows the PROFIBUS connector that is connected to
X30P of the MOVI-PLC
®
advanced DHF41B controller.
MOVI-PLC
®
/
PROFIBUS
connection
As a rule, the MOVI-PLC
®
advanced DHF41B controller is connected to the PROFIBUS
system using a shielded twisted-pair cable. Observe the maximum supported transmis-
sion rate when selecting the bus connector.
The twisted-pair cable is connected to the PROFIBUS connector using pins 3
(RxD/TxD-P) and 8 (RxD/TxD-N). Communication is carried out via these two pins. The
RS485 signals RxD/TxD-P and RxD/TxD-N must be connected to the same contacts in
all PROFIBUS stations. Otherwise the bus components cannot communicate via the
bus medium.
The PROFIBUS interface sends a TTL control signal for a repeater or fiber optic adapter
(reference = pin 9) via pin 4 (CNTR-P).
Baud rates
greater than 1.5
MBaud
The MOVI-PLC
®
advanced DHF41B controller with baud rates > 1.5 MBaud can only be
operated with special 12 MBaud PROFIBUS connectors.
Bus terminator You do not need to equip the MOVI-PLC
®
advanced DHF41B controller with bus termi-
nating resistors. This allows the PROFIBUS system to be put into operation more easily
and reduces the number of possible problems and faults during installation.
If the MOVI-PLC
®
advanced DHF41B controller is located at the start or end of a
PROFIBUS segment and if there is only one PROFIBUS cable connected to the
MOVI-PLC
®
advanced DHF41B controller, you must use a connector with an integrated
bus terminating resistor.
Switch on the bus terminating resistors for this PROFIBUS connector.
61766AXX
Figure 7: Assignment of 9-pin D-sub plug to IEC 61158
[1] 9-pin sub D plug
[2] Signal line, twisted
[3] Conductive connection over a large area is necessary between plug housing and
the shield
RxD/TxD-P
3
1
5
9
6
8
4
5
6
9
VP (P5V/100mA)
DGND (M5V)
DGND (M5V)
CNTR-P
RxD/TxD-N
[3]
[1]
[2]
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