TXP CLC Course
MAX limit value
For a MAX limit value the switching point is obtained by changing the measured
variable in relation to a maximum value, i.e. > MAX. For the MAX limit value the
> MAX signal is derived from the NOC of the switching device. Figures 10 and
11 show examples of > MAX signals for pressure and level. The > MAX signals
are assigned serial numbers of XG01 and NOT MAX signals are assigned serial
numbers of XG51.
5
NOT MAX MAX
XG51 XG01 XG51 XG01
50 100
PSIG PSIG
Pressure Pressure
NCC NOC NCC NOC
Set-point Set-point
≥ 75 PSIG ≥ 75 PSIG
Pressure NOT MAX or < MAX Pressure > MAX
Figure 10 - MAX Signal (Pressure) - XG01/XG51
NOT MAX MAX
XG51 XG01 XG51 XG01
Level Level
NCC NOC NCC NOC
Level NOT MAX or < MAX Level ≥ MAX
Figure 11 - MAX Signal (Level) - XG01/XG51
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