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7500 Series Manual
6.11 Programming K2
The K2 contact output can be programmed for various settings that are chosen by the user.
For Type Z and Ex pz systems, power to the pressurized enclosure can remain on if pressure goes below the
minimum allowed pressure, but an audible and/or visual alarm must be generated to notify the operator of a
problem.
K2 can be used to generate the signal for the alarm when properly configured. Alarm function based on any
pressure point (P1 to P4 is not available when K2 is mapped to K1, purging or bypass. Additionally, the K2/
ALARM LED indication is not an alarm indication when K2 is mapped to these functions.
When K2 is mapped to a function that is not an alarm for loss of safe pressure, the power to the enclosure
must be removed, or an external method of alarming is required.
Users-Selectable Settings for K2
K1 Switches simultaneously with K1*
P1+ Switches on when pressure exceeds P1
P1- Switches o when pressure falls below P1
P2+ Switches on when pressure exceeds P2
P2- Switches o when pressure falls below P2
P3+ Switches on when pressure exceeds P3
P3- Switches o when pressure falls below P3
P4+ Switches on when pressure exceeds P4
P4- Switches o when pressure falls below P4
Purging Switches on when purge timer starts and shuts o at the end of
purging
Bypass Switches on when the bypass function is activated
All Alarms Comes on when P1-, P4, Bypass
*This mode is intended for use when the system is controlling a line-to-line power source into the protected
enclosure and both power lines need to be switched.
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