Setup of Eurotherm Modules

When using Eurotherms 2404 or 2408 controllers that have been removed from Veeco power modules some changes must be made to work with our Eurotherm modules.

1) Change the serial communication board from RS-232 to RS-422. The Eurotherm part number required to make the change is: SUB24/EIA422. There are no settings that need to be changed - just this card. The reason the change is required is that the Veeco power modules internally make a conversion from to RS-232 in the Eurotherm controller to RS-422/485 on the rear panel DB9 connector.

2) Change configuration settings in the Eurotherms. To enter configuration mode follow these instructions:

Instructions for entering Eurotherm 2404/2408 configuration mode

Once in configuration mode, use the following navigation chart:

Navigation chart for Eurotherm 2404/2408 configuration mode

For more information, refer to the complete Installation and Operation Handbook.

The analog output is by default set to 4-20 mA. To change this to 0-5v or 0-10v, step through the list headers to 1A. In this list, change unit from mA to voLt. Change Out.L to zero and Out.H to the maximum programming voltage of the power supply being used. If in doubt, set the Out.H to a low value such as 1V and measure the power supply output with the Eurotherm in manual mode with 100% ouptput. Some power supplies enter an overvoltage mode if the programming voltage exceeds the maximum. To ensure this does not occur, it may be required to set the maximum ouput (Out.H) to slightly below the power supply input range (5.0V -> 4.9V).

The interlock functions are defined by LA and LB in configuration mode. To duplicate the default functionality of the Veeco power modules, change Func under LA from SP.2 to Stby. This will cause the output to go to zero if there is a vacuum failure. To cause the controller to go to setpoint 2 when there is a water failure, change Func under LB from nonE to SP.2.