ipf electronic PY740025, Manual, Page: 59 / 67

MANUAL [ PY740025/26 ]
•
Subject to alteration! Version: 22.10.2018
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6.5.6 Switching output
The switching output can be set as a point or a window, see Section DIGITAL OUT.
The output is transmitted as a push-pool signal with active high or active low (inverted), depending on the
setting.
6.5.7 Alarm output
The sensor evaluates the signal level (amount of reflected light) during every measurement cycle. If this level
falls below a defined value (signal gain), the alarm output and red LED on the sensor are activated.
Reasons for a low signal level:
• Signal gain too small
•
Incorrect mounting angle
• Insufficient light reflected from the object
•
Object outside the measuring field
The alarm output cannot be adjusted and is triggered by the following situations:
• No object in the measuring field
• Insufficient signal gain (e.g. with soiling) or incorrect OBJECT setting.
The alarm signal is output as a push-pull signal (active high).
Signal level Red LED Alarm output out2
Signal gain reached Off Low
Signal gain not reached Blinks (8 Hz) Low
No object inside the measuring range On High
NOTE
There is no excess gain hysteresis, which is why rapid switching between alarms can occur.