2–2
P485 MODBUS TO PROFIBUS CONVERTER – USER GUIDE
INSTALLATION
Figure 2-1: P485 electrical connections
PROFIBUS CONNECTOR
The Profibus connector is indicated as
A
in the figure above. This connector is used to
connect the P485 to the Profibus network.
The pin assignments for the Profibus connector are shown below.
Figure 2-2: Profibus connector
The following Profibus connectors are recommended:
•
Profibus Max standard, part number 134928 and Profibus reversed, part number
104577, from
http://www.erni.com
•
Fast connect bus connector, part number 6GK1500-0FC00 or 6ES7 972-0BA50-0XA0,
from
http://www.siemens.com
E
A
B
C
D
Table 2–1: Profibus connector pin assignments
Pin
Signal
Description
1
-
-
2
-
-
3
B-Line
Positive RxD/TxD (RS485)
4
RTS *
Request To Send
5
GNDBUS **
Isolated ground from the RS485 side
6
+5 V BUS **
Is5V output from the RS485 side (80 mA maximum)
7
-
-
8
A-Line
Negative RxD/TxD (RS485)
9
-
-
*
Used in some equipment to determine the direction of transmission. However, in normal
applications only A-Line, B-Line and Shield are used.
** Used for bus termination. Some devices such as optical transceivers (RS485 to fibre optics) may
require power from these pins.
5
1
6
9
(female)
Summary of Contents for P485
Page 2: ......
Page 36: ...4 14 P485 MODBUS TO PROFIBUS CONVERTER USER GUIDE SOFTWARE OVERVIEW ...
Page 42: ...5 6 P485 MODBUS TO PROFIBUS CONVERTER USER GUIDE COMMUNICATION MODEL ...
Page 56: ...8 6 P485 MODBUS TO PROFIBUS CONVERTER USER GUIDE ADVANCED FUNCTIONS ...
Page 74: ...10 2 P485 MODBUS TO PROFIBUS CONVERTER USER GUIDE MISCELLANEOUS ...