Wiring 11, Pnp) – Rockwell Automation 840E Solid-State Level Sensors User Manual
Page 13
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Wiring
11
4.1.2
DC-PNP Operation
Figure 4.2: DC-PNP Operation
Green light ON:
Sensor is connected to power supply and operational
Yellow light ON:
Sensor is immersed in liquid
Red light ON:
Overload or short-circuit in load circuit
- Rectify the short circuit
- Reduce maximum load current to below 250 mA
Green light OFF:
Error: No power supply
- Check plug, cable and power supply
Red light flashing:
Internal sensor error or sensor corroded
-Replace device
+
+
1
1
1
1
4
2
2
4
1
2
1
2
1
4
1
4
Green
Red
Yellow
(PNP)
MAX
MIN
L+
< 3 V
< 3 V
U
< 100 µA
< 100 µA
U
–
L+
–
L+
–
L+
–
I
I
I
I
U– (DC)
...
Light On
Light Off
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