Delta Proximity Sensors
The Delta proximity sensor category defines a non-contact inductive detection technology used for metal target sensing in industrial automation applications. The Delta Proximity Sensors, manufactured by Delta, operate through electromagnetic induction using coil-driven oscillator circuits, defined switching thresholds, and standardized sensing distances required for machine feedback functions. These sensors follow common mechanical structures such as M8, M12, M18, and M30 cylindrical housings, along with compact rectangular formats suitable for varied mounting conditions.
Electrical interfaces include DC-powered two-wire or three-wire configurations with PNP, NPN, NO, or NC outputs that connect directly to PLC input modules. The Delta inductive portfolio includes each Delta Inductive Proximity Sensor classification used for positioning, counting, presence detection, and industrial machine-state monitoring. This entity is defined as an inductive sensing technology type with coil-based structure, standardized proximity-class attributes, and discrete electronic interface identity.
Specifications:
- Sensing distance: 2 mm ± 10%, 4 mm ± 10%, 5 mm ± 10%, 8 mm ± 10%,12 mm ± 10%
- Differential Travel: max. 10% of sensing distance
- Detectable Object: Ferrous metal
- Power Supply Voltage (Operating Voltage Range): 12 to 24 VDC, ripple (p-p): max. 10%
- Current Consumption: 15 mA max
- Output:
– Load current: 200 mA max
– Residual voltage: 2V max. (load current: 200 mA, cable length: 2 m) - Indicators: Operation indicator (red)
- Operation Mode (with Sensing Object Approaching): NPN: NO / NC; PNP: NO / NC
- Ambient Temperature Range:
– Operating: Operating: -25 ~ +70 ºC / storage: – 40 ~ 80 ºC (with no icing or condensation) - Connection Method: 3 wires 2m cable and M12 connector with 200mm cable
Applications:
Food and beverages, packaging, pharmacy, electronic component equipment, textile, rubber and plastics, warehouses, and machine tool industries.
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Frequently Asked Questions
How to test a 3 wire Proximity Switch?
To test a 3-wire proximity switch, you need a multimeter. A multimeter measures electrical values.
First, turn off the power to the switch. Then, connect the multimeter’s probes to the switch’s wires. One probe goes to the blue wire, the other to the black.
Now, turn on the power. Bring a metal object close to the sensor. The multi meter should show a voltage change. If it does, the switch works. If not, it might be faulty
How to test a 2-wire Proximity Switch?
Testing a 2-wire proximity switch is straightforward. You’ll need a multimeter for this test.
First, make sure power is off. Safety is crucial when working with electronics. Connect the multimeter’s probes to the two wires of the proximity switch. Set the multimeter to measure resistance (ohms). Power on the switch. When no object is near the sensor, note the resistance. It might be high or low.
Now, bring a metal object close to the sensor. The resistance should change. If there’s a noticeable change, the switch is functioning. If not, it may be defective.
Always remember to work safely and turn off the power when connecting or disconnecting the multi meter.
