SMC D-M9P Solid State Auto Switch, 3-wire PNP, Cylinder Position Sensor, IP67
SMC
$29.05
The SMC D-M9P is a solid state auto switch (cylinder position sensor) with a 3-wire PNP output, red LED indicator, and 0.5 m grommet lead wire. It mounts directly to a compatible SMC actuator and detects piston position by sensing the magnet in the piston, with no moving parts to wear out.
Need a different lead length, NPN output, or a connector version? See the lead wire options and the D-M9 selection guide below.
Key Specifications
| Type | Solid state auto switch (cylinder position sensor) |
| Wiring / output | 3-wire PNP (normally open) |
| Indicator | Red LED, lights when the switch is ON |
| Electrical entry | In-line |
| Connection | Grommet (flying leads) |
| Lead wire | 0.5 m oilproof heavy-duty, 3 cores (brown, blue, black) |
| Power supply voltage | 5, 12, 24 VDC (4.5 to 28 VDC) |
| Load current | 40 mA or less |
| Current consumption | 10 mA or less |
| Leakage current | 100 µA or less at 24 VDC |
| Applicable load | PLC, relay, IC circuit |
| Enclosure rating | IP67 |
| Mounting | Direct mounting |
| Compatible actuators | CG1, CJ2, CM2, CQ2, MGP, MH, MX, NCA1, NCQ2 and more |
| Datasheet | View |
Mounting note: On some cylinder series and bore sizes the auto switch is installed with a separate switch mounting bracket. Check the cylinder catalog for the bracket part number, or contact our technical team and we will confirm it for you.
Wiring
| Brown | +V (DC supply positive) |
| Blue | 0 V (DC supply negative) |
| Black | Output signal (PNP, sourcing) |
A PNP switch sources current to the load, so it pairs with a sinking (PNP-compatible) PLC input card. If your input card is sourcing, use the NPN SMC D-M9N instead.
D-M9P Lead Wire Options
The letter after "D-M9P" sets the lead wire length. Electrical specifications are the same across all lengths.
| Part number | Lead wire length |
| D-M9P (this product) | 0.5 m |
| D-M9PM | 1 m |
| D-M9PL | 3 m |
| D-M9PZ | 5 m |
Choosing the Right D-M9 Switch
| If you need | Choose |
| 3-wire PNP output, in-line entry | D-M9P (this product) |
| 3-wire NPN output | D-M9N |
| 2-wire output (replacing a 2-wire reed switch) | D-M9B |
| PNP with perpendicular (90°) lead exit for tight spaces | D-M9PV |
| PNP perpendicular with M8 3-pin connector | D-M9PVSAPC |
| PNP perpendicular with M12 4-pin connector | D-M9PVSDPC |
| 2-color indicator to help set the optimum switch position | D-M9PWV (PNP, perpendicular) |
| Shorter switch body with less protrusion past the actuator end | D-M9PL-5 (short type, 3 m lead) |
| ATEX Category 3 compliance | D-M9PZ-588 (5 m lead) |
| Low-cost reed switch, or a 100 VAC load | D-A93 (reed, 2-wire) |
Features
- Solid state switching with no mechanical contacts for long service life in high-cycle applications
- Direct-mount body fits a wide range of SMC pneumatic cylinders, slide tables, and grippers
- Red LED indicator confirms switch operation during setup and troubleshooting
- Oilproof heavy-duty lead wire for demanding machine environments
- IP67 enclosure for washdown and dusty areas
Applications
Used for end-of-stroke and piston position detection on pneumatic cylinders and grippers in automated assembly, packaging, and material-handling equipment.
Frequently Asked Questions
Is the SMC D-M9P PNP or NPN?
The D-M9P is PNP (sourcing) with a 3-wire output. The NPN version is the D-M9N, and the 2-wire version is the D-M9B.
What is the difference between the D-M9P and the D-M9PV?
They are electrically the same. The D-M9P has an in-line electrical entry, so the lead wire exits straight along the cylinder. The D-M9PV has a perpendicular entry, so the lead wire exits at 90°, which helps where there is little room past the end of the switch.
What do the letters after D-M9P mean?
They set the lead wire length: no letter is 0.5 m, M is 1 m, L is 3 m, and Z is 5 m. For example, the D-M9PL is the same switch with a 3 m lead.
What is the difference between the D-M9P and the D-A93?
The D-A93 is a 2-wire reed switch with mechanical contacts. The D-M9P is a 3-wire solid state switch with no contacts to wear, so it is the better choice for high-cycle applications and PLC inputs. The D-A93 costs less and can also switch 100 VAC loads. Both use the direct-mount style on many SMC cylinders; confirm the applicable switches in the cylinder catalog.
Do I need a mounting bracket?
It depends on the cylinder. Many SMC actuators accept the D-M9P directly, while some series and bore sizes need a separate switch mounting bracket. The cylinder catalog lists the bracket part number, or our technical team can confirm it.
Automation Distribution is an authorized SMC distributor. Order the SMC D-M9P online, or contact our technical team for help confirming cylinder compatibility, lead wire length, and mounting brackets.
- Auto Switch:
- Solid State Auto Switch, Grommet, With Indicator Light, 3-wire (PNP), In-line
- Lead Wire:
- 0.5m
- Apply Voltage:
- DC5V,12V,24V(DC4.5~28V)
- Type:
- Standard
