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    Apter Power sources D-P4DWL against current SMC family and order-code evidence.

D-P4DWL

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SMC D-P4DWL is a two-wire magnetic-field-resistant solid-state auto switch with two-color indication and a 3 m in-line grommet lead.
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Technical specifications for D-P4DWL

  • Manufacturer:
    SMC
  • Part Number:
    D-P4DWL
  • Product Family:
    SMC
  • Product Type:
    Magnetic-Field-Resistant Solid-State Auto Switch
  • Stock:
    1
  • Switch Type:
    Solid-state, magnetic-field-resistant
  • Wiring:
    2-wire, non-polar
  • Lead Wire Length:
    3 m
  • Electrical Entry:
    In-line grommet
  • Applicable Load:
    24 VDC relay or PLC input
  • Load Voltage:
    24 VDC, 20 to 28 VDC
  • Load Current:
    6 to 40 mA
  • Internal Voltage Drop:
    5 V or less
  • Leakage Current:
    1 mA or less at 24 VDC
  • Operating Time:
    40 ms or less
  • Indicator:
    Red operating range; green proper operating range
  • Minimum Lead Bend Radius:
    36 mm reference
  • Standard:
    CE / UKCA marking
  • Weight:
    0.15 kg
  • Estimated shipping dimensions:
    3.2 x 2.0 x 1.3 cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    Japan
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Welding Boundary Mounting Lead Protection Product Applications

Features:

  • AC welding-field resilience: The sensing circuit is intended for specified alternating magnetic disturbance around supported actuator installations.
  • Two-color adjustment: Green indication identifies the preferred detection region within the wider red operating range.
  • Long integral lead: The L configuration carries the two-wire circuit through a 3 m cable without changing the switch body.
D-P4DWL detects the piston magnet of an approved pneumatic actuator while working near the alternating field of supported welding equipment.

Its non-polar two-wire interface is connected in series with a compatible 24 VDC load or PLC input.

The exact suffix matters at procurement because it determines cable reach and finished switch weight, not merely an accessory choice.

Apter Power can help confirm the SMC D-P4DWL Magnetic-Field-Resistant Solid-State Auto Switch, actuator application, welding source and 3 m lead requirement before quotation.
SMC D-P4DWL Magnetic-Field-Resistant Solid-State Auto Switch Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Supported field: Apply the magnetic-resistance claim only to the documented single-phase AC welding condition.
  • Excluded sources: Do not extend the claim to DC inverter, rectified or capacitor-discharge welding equipment.
  • Current review: Escalate applications above the published AC welding-current boundary to SMC engineering.
  • Magnetic surroundings: Keep accumulated iron debris and nearby magnetic objects from weakening the actuator detection field.
  • Actuator approval: Use the mounting method and bracket listed for the actual actuator and bore.
  • Position margin: Set the switch in the green zone rather than at the edge of the red operating range.
  • Fastener control: Tighten the small mounting screw only to the manufacturer’s specified torque.
  • Parallel equipment: Respect the documented separation or shielding requirement where adjacent actuators create magnetic interaction.
  • Strain relief: Fix the cable near the switch so actuator service cannot pull the molded entry.
  • Bend control: Route the 3 m lead above the stated reference bend radius and away from repetitive flex points.
  • Noise separation: Keep the signal cable apart from power and high-voltage wiring.
  • Fault evidence: Compare indicator behavior with the PLC input before replacing a switch that may have a load-interface problem.
  • Resistance welding fixtures: Provides cylinder-position feedback near supported single-phase AC welding conductors.
  • Clamp cylinders: Detects end position on approved actuators using the required bracket and magnet system.
  • Weld-cell tooling: Supports two-color setup where reliable piston-position feedback is needed around alternating magnetic fields.
  • Long cable runs: Reaches a remote junction or control enclosure when a 3 m integral lead is part of the machine design.
Description
For pneumatic actuators operating near single-phase AC welding conductors, D-P4DWL provides non-contact piston-position feedback with an interference-resistant sensing design.

The red-to-green indication pattern on D-P4DWL separates the general operating range from the preferred sensing zone, helping installers place the switch with usable adjustment margin instead of stopping at the first output transition.

The L suffix fixes a 3 m integral lead for D-P4DWL. That cable reach can remove an intermediate joint in a welding fixture while requiring deliberate strain relief and routing away from repeated flexing.
Alternative Names
DP4DWL D P4DWL D/P4DWL
Technical notes
D-P4DWL is specified for magnetic disturbance from single-phase AC welding equipment, not DC inverter, rectified or capacitor-discharge welding sources. Stop the selection if the process uses those excluded sources; for supported AC welding, review conductor current and placement, then secure the 3 m lead against cyclic bending and tensile load.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
A welding engineer plans to use D-P4DWL beside a DC inverter welder. Does the magnetic-field-resistant label approve that installation?
No. The published boundary excludes DC inverter and rectified welding sources. Stop the selection and obtain a switch solution specifically approved for that field condition.
A maintenance technician sees red indication from D-P4DWL but the signal changes with vibration. What adjustment should be tried first?
Move the switch toward the green proper-operating zone while the actuator is held at the required position. Red alone can be near a detection edge with insufficient installation margin.
A PLC input remains on after D-P4DWL turns off locally. Should the switch be replaced?
First compare the PLC off-state threshold with the switch leakage current and inspect parallel connections. A two-wire input circuit can retain enough current to prevent a high-impedance input from releasing.
A machine builder wants to coil the unused length of D-P4DWL around the cylinder. Is that an acceptable routing method?
Avoid tight coils and moving pinch points. Route the lead above the reference bend radius, provide strain relief and keep it separated from welding power conductors.
Stores receives a 5 m switch when the purchase order specifies D-P4DWL. Can the extra cable simply be ignored?
Treat it as a different order code, D-P4DWZ. Accept only after engineering approves the cable length, routing, weight and receiving identity for the installation.
An installer cannot find a stable green zone for D-P4DWL on the target actuator. What is the next decision?
Stop commissioning and verify the actuator’s approved switch family, bracket, magnet configuration and mounting surface. Do not compensate for a wrong application by tightening harder or accepting edge detection.

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