Alfa Laval PB-00479, System Manual

Page: 316 / 603

5.4 External component signal integration 5 System interfaces
5.4 External component signal integration
The following components and functions (not part of Alfa Laval’s scope of supply) can be integrated
with the control system. The communication is either handled by the remote interface (if the option
is integrated) or via hardwires. In some cases, hardwire is the only alternative.
Each signal that is used must be activated in the control system page 5.2 – Main parameters 2 .
Output indicates signal from PureBallast and Input indicates signal from ISCS.
Signal Control
cabinet
Explanation
Common alarm (strongly
recommended to be
integrated)
Output
What
: Output signal from PureBallast that there is an
(any) active alarm. An alarm stops down ongoing process.
How
: Active alarm = Open circuit. If an alarm is already
present and a new alarm is issued, the signal will go low
for three seconds, and the be reactivated as high.
Common warning Output
What
: As common alarm, but for warnings. A warning is
a notification of status change or a problem.
How
: See common alarm.
External system stop Input
What
: Input signal to PureBallast to stop the system.
If extra buttons (not part of AL scope of supply) to stop
PureBallast are desired on board. The power is still on.
How
: Open circuit = System stop command. Must be
connected via hardwire (W118).
Heeling mode (internal
transfer)
Input
What
: Input signal to PureBallast to to enter heeling mode.
Equal to pushing the Pause button in control system.
If integration of heeling command from ISCS is desired to
automatically pause ongoing ballast/deballast process for
a healing operation.
How
: Closed circuit = Heeling mode command. Only
possible in standby, ballast and deballast. Must be
connected via hardwire (W118).
Additional bypass 1 is
open
Additional bypass 2 is
open
Additional bypass 3 is
open
Input
What
: Input signal to PureBallast that an external bypass
valve (not part of Alfa Laval’s scope of supply).
If PureBallast can be bypassed using other valves
(apart from V212-31), status signals from them must be
integrated to the control system. All bypass cases must
be logged. When any bypass valve is opened, ongoing
process is terminated and the event is logged.
Three additional bypass valves can be handled via
hardwire, identified as additional bypass valve 1, 2 and 3.
If more valves are used, they must be connected in series,
which means that they are handled as one regarding
alarms and logging in PureBallast.
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Book No.9010183 02, rev. 2