WIKA Phase-Out PSD-3 Series User Manual

26 WIKA operating instructions pressure switch, model PSD-3x
EN
11430486.07 04/2015 EN/DE/FR/ES
6.6 Switching functions
Hysteresis function
If the system pressure uctuates around the set point, the hysteresis
keeps the switching status of the outputs stable. With increasing system
pressure, the output switches when reaching the switch point (SP).
■
Contact normally open (HNO): active
■
Contact normally closed (HNC): inactive
With system pressure falling again, the output will not switch back
before the reset point (RP) is reached.
■
Contact normally open (HNO): inactive
■
Contact normally closed (HNC): active
Window function
The window function allows for the control of a dened range.
When the system pressure is between window High (FH) and window
Low (FL), the output switches on.
■
Contact normally open (FNO): active
■
Contact normally closed (FNC): inactive
When the system pressure is outside window High (FH) and window
Low (FL), the output does not switch on.
■
Contact normally open (FNO): inactive
■
Contact normally closed (FNC): active
6. Commissioning, operation
Fig.: Hysteresis function
Fig.: Window function

WIKA Phase-Out PSD-3 Series Specifications

General

Brand	WIKA
Model	Phase-Out PSD-3 Series
Category	Switch
Language	English