BECKHOFF CX2500­0031 - Manual (Page 17)

Mounting and wiring
Setting the interface parameter
If the system interface CX2500­0031 is disconnected from the CX20x0 unit it is easy to access the dip
switches. Details on the disconnection procedure can be found in the chapter decommissioning. The dip
switches for the configuration of the RS485/422 interfaces can be found at the left side of the module. On the
left side you can see the switch:
The switch sets the parameters for RS422 or RS485 mode. The mode is set for both interfaces. If you need
RS485 and RS422 you need two interface modules CX2500­0031.
A small screwdriver helps to set the switches carefully. The system must be powered down, if the settings of
the switches are changed!
Setting DIP­Switches for RS485­mode:
For the RS485­mode is no echo and no termination available. The mode for send and receive is controlled
automatically. If a termination is needed it must be realized via the connector.
DIP Status Function
1 on RS485­H
2 on RS485­Mode
3 on RS485­Mode
4 on RS485­Mode
5 on RS485­Mode
6 on RS485­Mode
7 on RS485­Mode
8 on RS485­Mode
Setting DIP­Switches for RS422­mode:
DIP Status Function
1 off RS422­Mode
2 off RS422­Mode
3 off RS422­Mode
4 off RS422­Mode
5 off RS422­Mode
6 off RS422­Mode
7 off RS422­Mode
8 off RS422­Mode
CX2500­0031 17 Version 1.1