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Operation of a dust vacuum and Filter System
Pre-warning Stage, Filter Full Output
The "Filter full" output on the INSPIRE interface informs the user of the system that the
maximum filter saturation, at which the filters must be replaced, will soon be reached. This
warning occurs at 75% of the maximum filter saturation of the extraction and filter system,
and thus gives the user sufficient time to prepare for the filter change. For systems equipped
with filter cartridges and filter cleaning module, automatic differential-pressure filter cleaning
is additionally started when 75% of the maximum filter saturation is reached.
The filter-full warning is designed as an alternating relay contact. This provides for an
opening and a closing contact. If the INSPIRE internal supply voltage or the 220V / 120V
supply voltage is lost, the relay automatically returns to its initial state.
As an example, the filter-full warning can be used:
•
Prepare the filter change.
•
To initiate an order for replacement filters.
•
For automated processes, to pause the process at the next opportunity to change
the filters or start the filter cleaning.
•
To let the parent process run out for automated processes, and start the filter
system.
Start/Stop Input
The start/stop input is used to externally switch the status of the extraction and filter system
from stop (standby) to start (run). If an external 24 V signal level is applied to pins 07 and 08,
the system is in run mode (motor running, system extracts, display lights up green). After the
external 24 V signal level drops (no pulse), the system switches back to standby mode
(motor is off, display flashes turquoise).
The contact is a 24V input which is protected against polarity reversal and transmits a
galvanically isolated signal to the INSPIRE electronics via an optocoupler. As long as a 24 V
signal level is present at the start/stop input, start/stop signals from the start/stop button of
the front film are ignored.
RS232 commands can overwrite the signal level of the start/stop signal; the electronics then
switch to run or standby mode although the signal level is still present or is no longer present.
The system may not be controlled simultaneously via external control signals such as
start/stop and RS232, as otherwise it falls into undefined states and a reset (switch off and
then on again or software reset) must be carried out.
