Shutdown Timer For K1; Bypass - Pepperl+Fuchs 7500 User Manual

4.6. Shutdown Timer for K1

The shutdown timer is used in the operation mode and allows K1 to remain on for the
duration of this setting when enclosure pressure drops below the minimum setting
of P1. If the pressure goes above P1 during the countdown, the timer is reset. If the
pressure remains below P1 for the duration of the countdown, K1 will shut off.
The shutdown timer is effective only for Program 3, in which K1 de-energizes when
enclosure pressure is below P1. The other programs allow power to the enclosure to
remain on when pressure is below P1, with an alarm generated to the operator.
The default value is 0 seconds. The range is 0 to 300 seconds.

4.7. Bypass

The Bypass mode allows power to the enclosure to be energized when the enclosure
pressure is below the minimum pressure P1. This can be useful in commissioning the
enclosure or working on the enclosure when it is open.
The Bypass option has two modes of operation to choose from.
Mode
N No
Y Yes
Description
Bypass is not enabled.
Bypass is implemented using the purge settings menu.
By selecting 'Y', the system will go into bypass and will
turn on K1. In the 'Y' mode, K1 will be energized before
the system goes through a successful purge. This
mode can be useful in commissioning the enclosure
during start up. This mode is on when it is selected
and the menu stays in the purge settings mode. If the
user exits from the purge settings mode, then the 'Y' is
automatically changed to 'N' and K1 will de-energize.
Bypass LED is on while bypass is active.
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