INSTALLATION
A
B
CE
D
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.
Table 2–1: Profibus connector pin assignments
Pin | Signal | Description |
|
|
|
1 | - | - |
|
|
|
2 | - | - |
|
|
|
3 | Positive RxD/TxD (RS485) | |
|
|
|
4 | RTS * | Request To Send |
|
|
|
5 | GNDBUS ** | Isolated ground from the RS485 side |
|
|
|
6 | +5 V BUS ** | Isolated +5V output from the RS485 side (80 mA maximum) |
|
|
|
7 | - | - |
|
|
|
8 | Negative RxD/TxD (RS485) | |
|
|
|
9 | - | - |
|
|
|
* Used in some equipment to determine the direction of transmission. However, in normal applications only
** Used for bus termination. Some devices such as optical transceivers (RS485 to fibre optics) may require power from these pins.
51
96 (female)
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
P485 MODBUS TO PROFIBUS CONVERTER – USER GUIDE |
