Central Processing Unit
5–24
1070 072 145-102 (01.07) GB
5.4.6 X73 PROFIBUS-DP Interface
The PROFIBUS-DP interface on the ZE200-DP and ZE200A-DP comprises
an electrically isolated RS-485 interface and conforms to the EN 50170-2
standard. All components are designed for a baud rate of 12 Mbaud.
The X73 connector is a female DB-9. In addition to the bus signals, the inter-
face supplies an isolated 5 V power potential (VP) for feeding an external
device. The maximum permissible load on that device is 100 mA.
Pin assignment of female DB-9 connector:
Pin Signal designation Signal function
Shell Screen Screening
3 RxD/TxD-P Receive / Transmit data P
4 Repeater control signal P (TTL-
Signal)
5 DGND Data reference signal
6 VP Feed power; 100 mA
8 RxD/TxD-N Receive / Transmit data N
9 Repeater control signal N
(DGND)
. The screen must be attached to the connector shell via a low-impe-
dance connection at both cable ends.
Decentralized I/O address range
Inputs I0 ... 23 Max. 24 bytes
Outputs O0 ... 15 Max. 16 bytes
Extended inputs EI0 ... 127 Max. 128 bytes
Extended outputs EO0 ... 127 Max. 128 bytes
Channels 32 channels w/ 58 bytes I and 58 bytes O ea.
Additional characteristic data
Max. number of slaves 64 DP slaves addressable
Max. outputs per slave 244 bytes
Max. inputs per slave 122 bytes
Max. consistency block size 122 bytes
Direct access
Instances of direct access to decentralized I/O are mapped to an internal
image, and will reach the decentralized periphery only during I/O status.
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