THOMSON MEC 320 - GENSET CONTROLLER - Page 55

MEC 320 GENSET CONTROLLER
PM079 Rev 0 07/06/08 55 Thomson Technology
Principle
The illustration below shows that when the wire of the input breaks, the measured value will drop
to zero. Then the alarm will occur.
VDO settings
The alarm set point of the VDO inputs can be calculated in percent like this:
VDO 104, oil pressure:
VDO 105, cooling temp.:
VDO 106, fuel level:
The deviation is the alarm value entered in percent, and the setting is the required alarm setting
in ohms.
Example:
Required set point of VDO104 is 180. The adjustment must be:
Wire failure
Wire failure
Wire break
Lower failure
limit
Upper failure
limit
Input signal
(mA, °C, b, %)
t
100*240/% settingdeviation
=
%75
100*240/180
%
%
=
=
deviation
deviation
100*530/% settingdeviation
=
100*240/ % settingdeviation
=