Sening®
Innovative Tank Truck Systems
EPE2-
Controller for Meter Draining System
EPE2
Installation Manual
MN F08 003 US / DOK-450E Rev. 1.03 / JS / jp / March 2010 29
4 Residue discharge function description
Figure 8: Residue discharge function
If the EPE2-Controller in the “Stand-Alone residue discharge“ position (DIP-switch S1-1 on the
REC-1S printed circuit board see Figure 6 / page 18) is operated in the “OFF“ position, then the
above sequence results.
If the float switch (sensor input) indicates that there is enough product in the measuring
system after switching on the 24V supply voltage
, the solenoid valve (switch output)
and the supply voltage relay
(Power Out) are switched on immediately. The flow computer
electronic meter is powered via the switch contact of the supply voltage relay
.
In case of product shortage the float switch in the measuring system falls to dry and
switches from “full“ to “empty“. Once the empty state is detected, the solenoid valve
in
the main air is switched off and thus interrupts the discharge. The flow computer is switched
off via switching relay
after the set time T1. The time T1 has to be set long enough so that
the discharge comes to a standstill and the pulses entered up to this point in time can be
counted completely.
However if the product shortage is rectified within time T1, i.e. the float switch switches
from “empty“ to “full“, then the solenoid valve
of the main air is switched on again. The
power supply
of the flow computer is not interrupted in this case.
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