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condition.
*
As replacement to a MEPC.60(33) approved separator and no “Status Separator” signal is available.
Terminals 17&18 are for signal output of 0(4) to 20 mA. These are active outputs with an
open-load voltage about 5 V. And it is recommended not to exceed the 150 Ω external
load. The signal output complies the oil content from 0 to 30 ppm. In case of malfunction
e.g. EE means 20 mA.
The Terminals 19&20 could be linked to switch the EV-Valve to clean water. The EV-Valve
allows to remotely control the valve operation. The EV-Valve will stay in clean water
condition, and the OMD-24 will remain in alarm condition, as long as the link (Terminals
19&20) is present. these are dry contacts as well.
The Terminals 21&22 are outputs for external fresh water usage feedback. The OMD-24
EV, EVA , A will close the FW Valve Feedback contact whenever the FW Valve is set to
clean water usage.
Note: The Feedback contact is not influenced from the system fault conditions.
i
Note: For any input, it has to be used a potential free relay switch for the link to electrically
insulate the OMD-2 from any external voltages.
Generally, the inputs and the output share a common potential (Terminals: 12, 14, 16, 18,
20, 22).
8.1 External Control System
The installation on site has to make sure that in case of any loss of power supply and/or
loss of air supply for the automatic stopping device the overboard discharge valve close
the overboard line and open the re-circulating line.
The system showed in the example see Figure 18. Connection Example, employs alarm
relay 2 to control a pneumatic solenoid valve which energizes or de-energizes a
pneumatically operated 3 - way valve.
The separation process will continue until such time as the pollution level falls below the
alarm set point at which time the discharge will be directed overboard.
A pump stop system is according MEPC.107(49) not allowed.
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