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8.2 NOTES ON CONTROLLING A DIRECTIONAL VALVE IN A DUAL LINE SYSTEM:
When using hydraulic dual line system directional valves the pressure itself causes the valve to perform the line
inversion.
However, if using an electrically operated directional valve then a signal must be given to power the solenoid that
causes the valve to invert.
The VIP5 already has this control capability, but you must fit the equipment that included the Terminal Wiring board in
order to have the output present to power the solenoids. For further information contact the Dropsa technical sales
office.
3) SEP – SERIES PROGRESSIVE
Series progressive Operating mode is used
for Cycle switch monitoring typically on
progressive systems.
The Pump is switched on and P1 input is
monitored and must change state twice
within the timeout period otherwise a
timeout alarm will be generated.
Once P1 changes state twice, the pump is
switched off and VIP5 goes to standby or
the Lubrication Cycle is repeated for the
desired number of times
There is no WAIT time in this mode as
progressive systems do not need venting
time.
4) DL – DUAL LINE
Dual Line cycles generally use two pressure
switches connected to P1 and P2.
The VIP5 starts the pump and must see that
P1 switch is closed within the timeout time.
After this, the Lubrication lines are inverted
by use of a directional valve.
The P2 switch must also then be made
within the timeout timer setting.
A user configurable DELAY timer can be set
to filter pressure spikes as in the PS
operating mode.
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