Communication extension card
PROFIBUS communication card
-4-
Table 2-1 Connector pins
Connector pin
Description
1
-
Unused
2
-
Unused
3
B-Line
Data+ (twisted-pair wire 1)
4
RTS
Transmitting requests
5
GND_BUS
Isolation ground
6
+5V BUS
Isolated 5 V DC power supply
7
-
Unused
8
A-Line
Data- (twisted-pair wire 2)
9
-
Unused
Housing
SHLD
PROFIBUS cable shielding wire
The +5V and GND_BUS pins are used for bus terminators. Optical transceivers (RS-485) and
some other devices may need to obtain external power supplies through these pins.
For some devices, the transmission direction is determined by using the RTS pin. In regular
application, only the A-Line, B-Line, and SHLD pins are used.
It is recommended that you use the standard DB9 connectors manufactured by Siemens. If
the communication baud rate is required to be higher than 187.5 kbps, strictly follow the wiring
standards stipulated by Siemens.
2. Repeaters
A maximum of 32 stations (including the master station) can be connected to each
fieldbus segment. If the number of stations to be connected to a fieldbus segment
exceeds 32, you need to use repeaters to connect the fieldbus segments. Generally, the
number of repeaters connected in series cannot exceed 3.
Note:
No station address is provided for repeaters, but they are calculated as stations.
Terminal
Repeater
Repeater
1
1
2
31
30
2
3
30
31
……
……
Figure 2-2 Repeaters
Содержание Goodrive350 Series
Страница 1: ......
Страница 104: ...Communication extension card EtherCAT communication card 99...
Страница 135: ...66001 00600 202004 V1 2...