IFM SD1540 - 4�2 Switching Output

7
UK
- switching signal for temperature limit
- switching signal for pressure limit
- switching signal for preset counter
- switching signal for quantity meter
- analogue signal for volumetric flow quantity
- analogue signal for temperature
- analogue signal for pressure
- input for external counter reset signal (InD)
- OFF (output switched to high impedance)
4.2 Switching output
OUTx changes its switching status if it is above or below the set switching limits
(flow, temperature or pressure)� Hysteresis or window function can be selected�
Example of volumetric flow monitoring:
Hysteresis function Window function
SP
rP
FL
FH
SP = set point
rP = reset point
HY = hysteresis
Hno / Fno = NO (normally open)
FH = upper limit
FL = lower limit
FE = window
Hnc / Fnc = NC (normally closed)
When the hysteresis function is set, the set point (SP) is defined first and
then the reset point (rP) which must have a lower value� If only the set point
is changed, the reset point is changed automatically; the difference remains
constant�