10
10 Terms
Active zone
Area above the sensing face in which the sensor reacts to the approach of the
target�
Output function
Normally open: object within the active zone - output switched.
Normally closed: object within the active zone - output blocked.
Programmable: Choice between normally closed or normally open.
Positive switching: positive output signal (to L-).
Negative switching: negative output signal (to L+).
Power-on delay time
The time the sensor needs to be ready for operation after application of the
operating voltage (in the millisecond range)�
Hysteresis
Difference between the switch-on and the switch-off point.
Leakage current
Current for the internal supply of 2-wire units, also flows through the load when
the output is blocked�
Current consumption
Current for the internal supply of 3-wire DC units.
Switch point drift
Shifting of the switch point owing to changes of the operating conditions (e�g�
temperature, pressure, air humidity)�
Short-circuit protection
ifm sensors which are protected against excessive current by means of a pulsed
short-circuit protection� The inrush current of incandescent lamps, electronic
relays and low resistance loads may cause this protection to cut in and turn the
sensor off!
Operating voltage
The voltage range in which the sensor functions safely� A stabilised and
smoothed direct voltage should be used! Take into account residual ripple!
