Product Description; Switching Functions; Hysteresis Function (Excess Pressure In All Available Measuring Ranges) - Sick Pac50 Betriebsanleitung

Operating Instructions

4 Product description

The PAC50 establishes the applied compressed air pressure and converts this to a digital switching signal
and (as an option) an analog output signal. The applied pressure value is shown on an LCD display. The
parameter settings are made using three large pushbuttons.

4.1 Switching functions

4.1.1 Hysteresis function (excess pressure in all available measuring ranges)

In the event of rising system pressure, the output switches upon reaching the appropriate switching point
(SP). If the pressure drops again, the output does not switch back until the reset point (RP) has been reached.
If the applied pressure fluctuates around the switching point set on the pressure switch, the hysteresis keeps
the switching state of the outputs stable (see Figure 2).
p
SP
RP
Schließer
1
Normally open
0
1
Öffner
0
Normally closed
Figure 2: Hysteresis function in the event of excess pressure
4.1.2 Hysteresis function (underpressure, only for measuring ranges –1 ... 0 bar and –1 ... +1 bar)
Switchover at the switching point takes place when the pressure drops (increased underpressure), and switch-
ing back at the reset point takes place when the pressure increases (reduced underpressure). See Figure 3.
6 6 O p e r a t i n g I n s t r u c t i o n s | S I C K
Product description
t
8017612/14NK / 8/2/2019 | PAC50
Subject to change without notice
PAC50