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12.1.3 Pin assignments and cable specifications
12.1.3.1 Pin assignment
9-pin DSUB connector, female
Table 47: Pin assignment: PROFIBUS-DP interface
1 Shield - Cable shield
6 +5V +5 V +5V output (floating)
1)
2 - - Not used
7 - - Not used
3 RxD / TxD-P B-line transmission / reception data
8 RxD / TxD-N A-line transmission / reception data
4 RTS / LWL Request to Send
2)
9 - - Not used
5 GND5V 0 V Reference potential GND 5V
1)
1)
Can be used for external bus termination or to supply the transmitter/receiver of an external optical waveguide transmission.
2)
The signal is optional. It is used to identify the direction of an external optical waveguide connection.
12.1.3.2 Counterplug
9-pin DSUB connector, for example Erbic MAX PROFIBUS IDC Switch, made by ERNI
12.1.3.3 Cable type and configuration
The cable names given refer to cables made by Lapp. They have proven to be reliable and are successfully used in many
applications. However, it is also possible to use comparable cables from other manufacturers, for example Lütze or Helukabel.
LAPP KABEL UNITRONIC BUS L2/FIP FC; 1 x 2 x 0.64; ∅ 7.8 mm,
with tinned total CU shielding for quick-connect applications with IDC connectors
For highly flexible applications:
LAPP KABEL UNITRONIC BUS FD P L2/FIP; 1 x 2 x 0.64; ∅ 8 mm,
with tinned total CU shielding for highly flexible use in drag chains
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