Bühler technologies Nivotemp NT M-XP Series, Installation And Operation Instruction Manual, Page: 40 / 59

Bedienungs- und Installationsanleitung
Installation- and Operation Instruction
Nivotemp NT M-XP
40
BX100023, 02/2011 Art. Nr. 90 32 040
Window
Window with
NO contact
Window with
NC contact
The switch works as NO or NC
contact. The limits of the window are
set by
FH and FL . If the measuring
signal reaches the window the
output signal is set. If the measuring
signal leaves the window the output
signal is reset.
NO contact
is to be understood in the
following way: the PNP switching
output is closed if the level is within
the window limits. Otherwise it is open.
NC contact
is to be understood in the
following way: the PNP switching
output is open if the level is within the
window limits. Otherwise it is closed.
FH
FL
1
0
1
0
F000574
Window
Time t
Time t
Time t
(
Fno
NO contact)
(
Fnc
NC contact)
Frequency output
Frequency output
In this case, a square wave signal
with a frequency between 1 Hz and
100 Hz in proportion to the
measuring signal is set at the
output.
Note:
In order to increase the slope
of the square wave, we recommend
loading the switching output with a
10 k
Ω
resistor.
+24 V
+24 V
+24 V
F000575
Time t
Time t
Time t
Example: = 15 °C, = 80 °C
with temperature T and frequency f:
F1.Lo F1.Hi
T = 47,5 °C
f = 50 Hz
is equivalent to
T
f = 100 Hz
F1.Hi
is equivalent to
T
is equivalent to
f
= 1 Hz
F1.Lo
Note:
The switching function may have different notations:
SP
rP
SP
rP
F
000585x
open
(0)
open
(0)
closed
(1)
closed
(1)
rising closer
falling opener
NO (normally open)
Hno
rising opener
falling closer
NC (normally closed)
Hnc