DX-W2 Safety Door Lock (Solenoid Guard Locking Interlock Switch)

Name: DX-W2 Safety Door Lock (Solenoid Guard Locking Interlock Switch)
Brand: DAIDISIKE
SKU: dx-w2-safety-door-lock

Contact-type guard locking switch with 4 contact blocks in 14 NC/NO configurations and 1300 N holding force.

▶ Watch it in action: Safety Light Curtain + Guard-Locking Door Switch Interlock — Wiring Demo

DX-W2 Safety Door Lock (Solenoid Guard Locking Interlock Switch) - product photo

🔍 Click to enlarge · 1/21

Technical Specifications

Output type	Mechanical contact type (C = NC, O = NO), 4 contact blocks, 14 combinations
Locking type	GD = electromagnetic locking / mechanical release; GC = mechanical locking / electromagnetic release
Head material	J = metal head / S = plastic head
Cable/conduit interface	G = M20 conduit entry (unwired as standard) / X = factory-fitted cable, 1.5 m
Solenoid voltage	24 V DC ±10%, 4.8 W
Holding force	1300 N
Protection rating	IP67
Mechanical life	1,000,000 operations
Electrical life	150,000 operations
Contact ratings	AC-15 240V/3A; DC-13 30V/2.3A
Forced separation	≥80 N / ≥10 mm
Operating temperature	-20°C to +60°C
Optional accessory	Rear manual unlock (DX-W2-L kit: sleeve + limit plate + 3× M4 screws + metal knob, 90° clockwise release)
Compatible actuator keys	DX-K series (11 keys)

Overview

The DX-W2 is a mechanical-contact safety door lock (guard locking switch) that mechanically holds a machine guard door closed until a hazardous motion (e.g. a spindle running down) has come to a safe stop, then releases the lock via a solenoid. It reports two independent states through its contact blocks — the actuator key/tongue position and the lock status — so a safety relay or safety PLC can verify both "door closed" and "lock engaged" before allowing a machine to start.

It is intended for machine builders and panel integrators working with traditional relay-based (electromechanical) safety circuits, typically on CNC machine tools, injection/die-casting machines, and automated production-line fence access doors, where a coded/electronic (RFID) interlock is not required and a contact-output device that wires directly into existing relay logic is preferred.

Features & Benefits

Four contact blocks, 14 NC/NO configurations

Two independent contact compartments (head/actuator side and body/lock side) give four contact blocks in total, combinable into 14 patterns (CO/CO, 2C/2C, 3C/C, C/C2O, O/3C, 2C/2O, etc.) across 28 catalog models. This lets a panel builder pick exactly how many NC safety contacts and NO status/indication contacts are needed, without adding an external expansion relay.

1300 N holding force

The solenoid/mechanical lock mechanism holds 1300 N of force, resisting manual attempts to pull the guard door open while a machine's hazardous motion (e.g. spindle coast-down) is still in progress.

GD and GC locking-type versions

Every one of the 14 contact configurations is available in two locking types: GD (electromagnetic locking / mechanical release) and GC (mechanical locking / electromagnetic release), letting the safety-circuit designer choose the fail-safe behaviour that matches the application's risk assessment.

IP67-rated housing with gold-plated silver-alloy contacts

The switch is rated IP67 and built with a PA66 flame-retardant housing and gold-plated silver-alloy contact blocks, suited to environments with coolant spray, cutting oil mist, or dust around the guard door.

1,000,000 mechanical / 150,000 electrical operating cycles

Rated for 1,000,000 mechanical operating cycles and 150,000 electrical (contact-switching) cycles, giving a service-life margin for doors that are opened and closed frequently during shift changes, tooling, or maintenance.

Forced-separation escape function

In addition to normal solenoid-driven locking/unlocking, the mechanism supports forced separation (manual override) with ≥80 N force over ≥10 mm of travel, providing a way to open the door manually if power or the solenoid is unavailable.

24 V DC ±10% solenoid supply, 4.8 W

The solenoid operates on 24 V DC ±10% at 4.8 W (approximately 200 mA), matching the 24 V DC supply already present in most industrial control cabinets, so no separate high-voltage supply is needed for the locking mechanism itself.

Optional rear manual unlocking kit

An optional DX-W2-L accessory kit (sleeve sized to panel thickness, limit plate, 3× M4 screws, and a metal knob that releases with a 90° clockwise turn) adds a manual unlock point on the back of the guard, useful when the door needs to be opened from the machine-interior side.

Applications

CNC machine tool spindle guard doors — The 1300 N holding force and mechanical/electromagnetic locking keep the guard door from being opened while the spindle is coasting down, with the two contact compartments available for a dual-channel safety circuit.

Injection molding and die-casting machine safety gates — The IP67 rating and 150,000-cycle electrical life suit the oil mist, dust, and frequent opening/closing typical of injection molding and die-casting workshops.

Automated production-line perimeter fence access doors — The mechanical-contact output wires directly into traditional relay-based safety circuits without needing an additional signal-conversion device.

Robot cell maintenance access doors requiring dual-channel monitoring — The four contact blocks can be configured to provide NC safety-channel signals and NO door-status indication signals separately, meeting a maintenance door's need for both closed and locked confirmation.

Press brake and stamping equipment safety enclosures — The 1300 N holding force combined with the ≥80 N/≥10 mm forced-separation function balances lock strength with the ability to manually open the door in an emergency.

Retrofit of relay-based (non-electronic) safety circuits on legacy machinery — Because the output is contact-based rather than transistor/RFID-coded, it can be wired directly into an existing relay control cabinet without converting the circuit to an electronic safety bus.

Guard doors requiring back-side manual release for operator access from the machine interior — The optional DX-W2-L rear manual unlock accessory kit lets maintenance personnel open the door from the machine-interior side.

Models & Ordering Information

GD Series — Electromagnetic Locking / Mechanical Release, Metal Head (M20 conduit entry)

DX-W2-CO/CO-GD-JDX-W2-CO/2C-GD-JDX-W2-2C/CO-GD-JDX-W2-2C/2C-GD-JDX-W2-C2O/C-GD-JDX-W2-3C/C-GD-JDX-W2-2CO/C-GD-JDX-W2-C/3C-GD-JDX-W2-C/C2O-GD-JDX-W2-C/2CO-GD-JDX-W2-O/3C-GD-JDX-W2-O/2CO-GD-JDX-W2-2C/2O-GD-JDX-W2-2O/2C-GD-J

14 contact configurations (C = NC, O = NO; code before/after the slash = key/tongue-monitoring compartment / lock-status-monitoring compartment).

GC Series — Mechanical Locking / Electromagnetic Release, Metal Head (M20 conduit entry)

DX-W2-CO/CO-GC-JDX-W2-CO/2C-GC-JDX-W2-2C/CO-GC-JDX-W2-2C/2C-GC-JDX-W2-C2O/C-GC-JDX-W2-3C/C-GC-JDX-W2-2CO/C-GC-JDX-W2-C/3C-GC-JDX-W2-C/C2O-GC-JDX-W2-C/2CO-GC-JDX-W2-O/3C-GC-JDX-W2-O/2CO-GC-JDX-W2-2C/2O-GC-JDX-W2-2O/2C-GC-J

Same 14 contact configurations as the GD series, with mechanical locking / electromagnetic release. Order code: DX-W2-[key/tongue output]/[lock-status output]-[G/X]-[C/D]-[J/S]; the 28 models above use the standard G (M20 conduit entry) interface and J (metal head); S (plastic head) and X (factory-fitted cable) head/interface variants are also available under the same code structure.

PDF & 3D CAD Downloads

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DX-W2 Safety Door Lock Technical Data Sheet

English · 31.2 MB

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How to Select

Choose the head-side/body-side contact pattern (C = 1×NC, O = 1×NO, CO = 1×NC+1×NO, 2C = 2×NC, 3C = 3×NC, C2O = 1×NC+2×NO, 2CO = 2×NC+1×NO, 2O = 2×NO) based on how many NC (safety) and NO (status) contacts your circuit needs; 14 combinations are offered.
Select GC (mechanical locking, electromagnetic release) or GD (electromagnetic locking, mechanical release) based on the fail-safe behaviour your risk assessment requires when power is lost.
Choose G (M20 conduit entry, unwired, for field wiring) or X (factory-fitted 1.5 m cable, customizable length) for the cable/conduit interface.
Choose J (metal head) for higher-mechanical-stress or metalworking environments, or S (plastic head) as a lighter-duty, lower-cost option.
Match the switch to one of the 11 DX-K series operating keys based on door hinge geometry and approach angle; for hinged doors a door radius R > 300 mm is required, with a key positioning tolerance of ±1 mm.
Add the optional DX-W2-L accessory kit if back-side (machine-interior) manual release is required.

📘 Need the full method? How to Choose a Safety Door Switch / Interlock

When NOT to specify the DX-W2 — and what to use instead

The application needs RFID-coded or electronic transistor output rather than mechanical contacts.

Why not: DX-W2 is a mechanical-contact device (C/O contact blocks) intended for relay-based circuits; it has no RFID coding or transistor output.

Use instead: DX-D6 guard-locking switch for RFID + NPN/PNP output, or DX-R1 for non-contact monitoring only

The risk assessment calculates guard-opening forces above the rated 1300 N holding force.

Why not: 1300 N is DX-W2's published holding force; loads above this exceed the documented capability of the lock.

Use instead: DX-D6 (2000 N holding force) if an electronic RFID output is acceptable, or consult the factory for supplementary restraint

The door is opened and closed at a rate that will exceed 150,000 electrical (contact-switching) operations over the machine's service life.

Why not: DX-W2's rated electrical life is 150,000 operations (versus 1,000,000 mechanical operations).

Use instead: DX-W5, whose electrical life is rated at greater than 150,000 operations

Only one or two safety-contact channels are needed and the extra contact blocks would go unused.

Why not: DX-W2 provides four contact blocks across 14 combinations, more than a single- or dual-channel circuit typically requires.

Use instead: DX-W3, the simplified 2-contact-block version of the same platform

The project needs a published PFHd, or an independently issued certificate number rather than a design-basis claim.

Why not: DX-W2 is a mechanical-contact interlock with no PFHd/B10d/MTTFd or certificate number published; certification documents are supplied only on request.

Use instead: Request the certification package from the factory and validate the complete circuit with a DA31 or DQSRN safety relay

Specifications we do not publish yet

We only publish a figure once we are confident it is true. The items below are still being validated through further testing and real-world customer feedback, so for now we would rather leave them open than guess. If one of them matters to your design, ask us for the latest validated status.

PFHd / B10d / MTTFd reliability figures
Certificate number and scope for the design basis
Overall body dimensions and weight
Connector pin-out for the X (factory-fitted cable) variant
Approach speed / minimum safety-distance guidance per ISO 13855
Coating/finish corrosion-resistance rating beyond the PA66 housing note

Frequently Asked Questions

What does "GD" and "GC" mean in the DX-W2 order code?

GD indicates electromagnetic (solenoid) locking with mechanical release, and GC indicates mechanical locking with electromagnetic (solenoid) release. Both are available in all 14 contact configurations, giving 28 catalog models in total.

How many contacts does the DX-W2 have, and can I choose the NC/NO mix?

The DX-W2 has four contact blocks arranged in two independent compartments (key/tongue-monitoring side and lock-status-monitoring side). These can be ordered in 14 different NC/NO combinations, ranging from single-contact configurations (e.g. C/C) up to configurations with up to 3 NC or a mix of NC and NO contacts (e.g. 3C/C, C/C2O), so you can match the exact number of safety (NC) and status/indication (NO) contacts your circuit requires.

What is the holding force of the DX-W2 lock?

The lock holds with 1300 N of force.

What voltage does the solenoid operate on?

The solenoid is rated 24 V DC ±10%, drawing approximately 200 mA at 4.8 W.

What is the protection (ingress) rating of the DX-W2?

IP67.

What is the mechanical and electrical life of the DX-W2?

1,000,000 mechanical operating cycles and 150,000 electrical (contact-switching) cycles.

Can the DX-W2 be opened manually if there is a power failure or the solenoid does not release?

Yes. The mechanism supports forced separation (manual override) requiring ≥80 N of force over ≥10 mm of travel. An optional DX-W2-L rear (back-side) manual unlock accessory kit is also available, releasing with a 90° clockwise turn of a metal knob.

What contact ratings does the DX-W2 support?

AC-15 240 V / 3 A and DC-13 30 V / 2.3 A.

What is the operating temperature range?

-20°C to +60°C.

Does the DX-W2 use a contact (relay-wired) output or an electronic/coded (RFID) output?

The DX-W2 is a mechanical-contact output device, intended to wire directly into traditional relay-based safety circuits. It does not use RFID coding or transistor output — for those, see our DX-D6 series.

What operating key options are available for the DX-W2?

11 keys in the DX-K series (T-type, L-type, long T-type, long L-type, and horizontally/vertically adjustable variants), selected to match the guard door's hinge geometry and approach angle.

Can you provide certification documents for the DX-W2, such as CE?

Certification documents are available on request.

Related Categories and Example Products

Explore other functions that may be needed in a machine or line. The products below are category examples, not pre-validated electrical or safety combinations. Confirm each interface and application separately: Safety Relays · Safety Light Curtains · Safety Mats