5
UK
3.2 Use of the auxiliary connection M5
Observe the respective notes in these instructions for measurement
accuracy optimisation for differential pressure measurements (→ chapter
9�3�5 Differential pressure measurement)�
Application:
compressed air (other media on request); use for differential
pressure measurement; connection of the low pressure side�
In particular for filter monitoring, the output side of the filter (i�e� the lower
pressure level) is connected to the auxiliary connection M5 while the input side
of the filter is connected to the G1/8 connection (→ chapter 3.1 Use of the main
connection G1/8, → chapter 5 Installation). Observe the following pressures in this
application:
• Permissible overload pressure
in the auxiliary connection as opposed to the
main connection: 2 bar / 29 PSI�
• Bursting pressure
of the auxiliary connection as opposed to the main
connection: 12 bar / 174 PSI�
4 Function
4.1 Output signals
• The unit displays the current system pressure (with use of the main connection
G1/8 only) or the differential pressure (with additional use of the auxiliary
connection M5)�
• It generates 2 output signals according to the parameter setting�
OUT1
Switching signal for limit value / IO-Link
OUT2
Analogue output 4���20 mA (fixed across the measuring range of the sensor)
4.2 Switching function
OUT1 changes its switching state if it is above or below the set switching limits
(SP1, rP1)� The following switching functions can be selected:
•
Hysteresis function / normally open: [ou1] = [Hno] (→ Fig. 1).
•
Hysteresis function / normally closed: [ou1] = [Hnc] (→ Fig. 1).
First the set point (SP1) is set, then the reset point (rP1) with the requested
difference�
•
Window function / normally open: [ou1] = [Fno] (→ Fig. 2).
•
Window function / normally closed: [ou1] = [Fnc] (→ Fig. 2).