CNTD CJF square inductive proximity sensors detect metal targets at 5–15mm nominal distances. The standard range combines ABS housings, IP67 protection, red operating indicators and 2m free-ended cables. Five housing groups offer NPN, PNP and DC two-wire models; the three larger groups also provide AC two-wire versions. Select the output circuit and operating gap together.
In each cell below, the first model is normally open and the second is normally closed. DNA/DNB identify NPN outputs, DPA/DPB identify PNP outputs, DLA/DLB identify DC two-wire circuits, and AKA/AKB identify AC two-wire circuits.
| Housing / nominal distance | NPN | PNP | DC two-wire | AC two-wire |
|---|---|---|---|---|
| 17 / 5mm | CJF17-05DNA CJF17-05DNB | CJF17-05DPA CJF17-05DPB | CJF17-05DLA CJF17-05DLB | No model listed |
| 18 / 5mm | CJF18-05DNA CJF18-05DNB | CJF18-05DPA CJF18-05DPB | CJF18-05DLA CJF18-05DLB | No model listed |
| 25 / 8mm | CJF25-08DNA CJF25-08DNB | CJF25-08DPA CJF25-08DPB | CJF25-08DLA CJF25-08DLB | CJF25-08AKA CJF25-08AKB |
| 30 / 12mm | CJF30-12DNA CJF30-12DNB | CJF30-12DPA CJF30-12DPB | CJF30-12DLA CJF30-12DLB | CJF30-12AKA CJF30-12AKB |
| 40 / 15mm | CJF40-15DNA CJF40-15DNB | CJF40-15DPA CJF40-15DPB | CJF40-15DLA CJF40-15DLB | CJF40-15AKA CJF40-15AKB |
| Group | Nominal distance | Standard iron target | NPN / PNP setting range | DC two-wire setting range | AC two-wire setting range | DC response frequency |
|---|---|---|---|---|---|---|
| CJF17-05 | 5mm | 18×18×1mm | 0–3.5mm | No AC model listed | 500Hz | |
| CJF18-05 | 25×25×1mm | 0–3.5mm | ||||
| CJF25-08 | 8mm | 30×30×1mm | 0–5.6mm | 350Hz | ||
| CJF30-12 | 12mm | 40×40×1mm | 0–8.4mm | 0–7.5mm | 0–8.4mm | 250Hz |
| CJF40-15 | 15mm | 60×60×1mm | 0–10.5mm | 0–12.5mm | 0–10.5mm | 100Hz |
CJF30 and CJF40 setting ranges differ by circuit. Use the selected circuit's entry when setting the target gap. AC response frequency is 20Hz. Frequency values are averages measured with the standard iron target, successive targets separated by twice the target width, and a sensing gap equal to half the nominal distance.
| Item | NPN / PNP | DC two-wire | AC two-wire |
|---|---|---|---|
| Operating voltage | 10–30VDC | 90–250VAC | |
| Control output | 200mA maximum | ||
| Leakage current | ≤10mA | ≤0.6mA | ≤10mA |
| Residual voltage | ≤1V | ≤3.5V | ≤10V |
| Protection circuits | Surge, reverse-polarity and overcurrent protection | Surge protection | |
| Hysteresis | ≤10% of nominal sensing distance | ||
| Temperature influence | Within ±10% of the sensing distance at 20°C over −25 to +70°C | ||
The transistor specification also describes overload and short-circuit protection. Check leakage and on-state voltage drop against the receiving input, particularly when selecting a two-wire circuit.
| Housing groups | Cable diameter | Length | Conductor count | Strands per conductor |
|---|---|---|---|---|
| 17 / 18 | 3.8mm | 2m | 3P for NPN/PNP; 2P for the listed DC or AC two-wire models | 25 |
| 25 / 30 / 40 | 4.8mm | 30 |
The construction description specifies AWG22, 0.1mm strand diameter and 1.25mm conductor-insulation outside diameter. The strand figures refer to individual conductors. Standard cable insulation is dark gray PVC; the sensor case is ABS.
| Position | Field | Meaning and choices |
|---|---|---|
| 1 | CJ | Inductive sensing |
| 2 | F | Square housing |
| 3 | Size | 17, 18, 25, 30 and 40 identify the five housing groups above. The wider guide also includes 10, 11 and 12 compact housing families. |
| 4 | Version | Blank=standard type |
| 5 | Distance | 05=5mm; 08=8mm; 12=12mm; 15=15mm. The wider guide also gives 06=6mm and 07=7mm. |
| 6 | Supply | D=10–30VDC; A=90–250VAC. General guide choices E=20–60VDC and J=5–10VDC have no full models listed above. |
| 7 | Output circuit | N=NPN; P=PNP; K=AC two-wire; L=DC two-wire |
| 8 | Output state | A=NO; B=NC. C=NO+NC is a general guide choice without full combined-output models in these selection tables. |
| 9 | Connection | Blank=free-ended cable; M=straight male M12 four-pin A-coded connector. Further M-type, DT, AMP and SM connector configurations have placeholders without individually defined subcodes. |
| 10 | Cable material | Blank=PVC; U=PUR; VP=shielded PVC; UP=shielded PUR |
| 11 | Lead length | L1–L5 denote length choices, with L1=1m; lengths are not restricted to L5. The listed standard sensors have 2m cables. |
| Group | Body length | Cross-section | Drawing references |
|---|---|---|---|
| CJF17-05 | 28mm | 17×17mm | 24.6mm axial reference; 11mm between mounting centers |
| CJF18-05 | 36.2mm | 18×18mm | 26.3mm and 6.8mm axial references; 10.8mm between slot centerlines |
| CJF25-08 | 39.2mm | 25×25mm | 34.55mm and 1.2mm axial references; 17.9mm between mounting centers |
| CJF30-12 | 53.2mm | 30×30mm | 45mm and 4mm axial references; 22mm between slot centerlines |
| CJF40-15 | 53mm | 40×40mm | 47.4mm and 2mm axial references; 30mm between slot centerlines |
Body lengths exclude the free cable. The attachment shows the complete slot geometry, indicator position and cable exit; these reference dimensions do not establish an unspecified hole diameter.
Dimensions below are in millimeters. A is the illustrated opposing-sensor gap and B is the parallel spacing. C, φd, ℓ and m refer to the surrounding-metal diagram; its d label corresponds to the table's φd row. A separate opposing orientation is marked 180mm. Use the drawing that matches the actual mounting orientation.
| Group | A | B | C | φd / d | ℓ | m |
|---|---|---|---|---|---|---|
| CJF17-05 | 30 | 36 | 5 | 15 | 24 | 18 |
| CJF18-05 | 48 | 40 | 5 | 24 | 33 | 20 |
| CJF25-08 | 30 | 40 | 5 | 15 | 25 | 20 |
| CJF30-12 | 60 | 50 | 5 | 30 | 30 | 25 |
| CJF40-15 | 120 | 70 | 5 | 60 | 45 | 35 |
For the listed NPN/PNP sensors, connect brown to +V, blue to 0V and black to the switching input. The NPN load connects between +V and black; the PNP load connects between black and 0V. Two-wire sensors connect in series with the load, which may be placed in either lead. Use 90–250VAC for the listed AC models. Circuit drawings and NO/NC operating waveforms are included in the attachment.
| External input example | Supply leads | Switching lead | Adjustment |
|---|---|---|---|
| PA10-U input 1 | Brown to 9 (+12V); blue to 10 (GND) | Black to 11 (IN1) | DC three-wire example |
| PA-12 power amplifier | Brown to 6; blue to 5 | Black to 4 | Match the NPN/PNP selector to the sensor circuit |
| Item | Specification |
|---|---|
| Protection / indication | IP67; red operating LED |
| Operating / storage temperature | −25 to +70°C / −30 to +80°C, without icing |
| Humidity | 35–95%RH without condensation |
| Insulation resistance | ≥50MΩ at 500VDC |
| Dielectric strength | 1500VAC, 50/60Hz, 1min |
| Vibration | 1mm amplitude, 10–55Hz over 1min, 2h in each X/Y/Z direction |
| Shock | 500m/s², approximately 50G, three times in each X/Y/Z direction |
| Referenced standards | CCC: GB/T14048.10; TÜV and CE: EN60947-5-2. Supporting certificates are not included. |
| Utilization references | DC-13: 10–30VDC, 200mA; AC-140: 24–250VAC, 200mA. Select each model using its operating-voltage specification above. |
Use for ordinary industrial metal detection within the stated target, gap, current and mounting conditions. Regional specifications can vary. Unless specially designed and confirmed by the manufacturer, these products are excluded from personnel-safety functions, exceptionally high-reliability nuclear, gas and power systems, harsh outdoor or contaminated environments, fire and explosion hazards, strong-acid or alkali environments, and military or aerospace applications.
