DX-D6 Guard Locking Safety-Door Switch
Guard locking safety-door switch: 2000 N holding force, redundant dual outputs, RFID-coded actuators.
▶ Watch it in action: Safety Light Curtain + Guard-Locking Door Switch Interlock — Wiring Demo
🔍 Click to enlarge · 1/11Technical Specifications
| Output type | N = dual NPN output / P = dual PNP output (independent redundant dual outputs) |
|---|---|
| Coding | S = universal coded / D = uniquely coded |
| Locking method | C = mechanical lock / solenoid release / D = solenoid lock / mechanical release |
| Function level | R = standard type / H = advanced function type |
| Connection | A = direct leads (3 m default) / B = M12 male connector |
| Construction | All-metal structure; integrated guard locking + monitoring |
| Holding force | 2000 N |
| Cross-section | 30×30mm |
| Cascading | Cascadable to reduce controller input points |
Overview
DX-D6 is an electronic guard locking interlock switch for machine safety fences and access doors. Unlike a simple door-position sensor, it physically locks the guard door closed — via either a mechanical-lock/solenoid-release mechanism or a solenoid-lock/mechanical-release mechanism — so an operator cannot open the door while the machine is still in a hazardous state, and the machine's safety controller can prevent restart until the door is confirmed locked.
It is intended for machine builders and system integrators designing perimeter or point-of-operation guarding on CNC machine tools, robot work cells, and automated production lines where doors must stay locked during coast-down, residual motion, or other lingering hazards after the stop command. The switch combines guard locking with redundant dual-channel monitoring — 2000 N holding force and dual NPN/PNP outputs — in a compact 30×30 mm all-metal body, offered across 32 model variants with universal- or uniquely-coded RFID actuator options.
Features & Benefits
Guard locking with integrated monitoring
The door stays mechanically or electromagnetically locked until the hazardous motion has stopped, and the machine cannot be released to restart until the guard is confirmed locked — a functional step beyond a switch that only reports door status.
2000 N holding force
Locking force is rated at 2000 N, sufficient to resist an operator forcing the guard door open while the machine is still running down.
Two locking logics for two risk profiles
Available as C-type (mechanical lock / solenoid release, power-to-release — stays locked on power loss) or D-type (solenoid lock / mechanical release, power-to-lock — releases automatically on power loss), so the correct locking behavior can be matched to the machine's risk assessment.
Redundant dual-channel outputs
Dual NPN or dual PNP independent outputs provide redundancy so that a single-channel fault does not by itself create an unsafe condition.
Universal or uniquely coded actuators
Choose a universal-coded actuator (DX-K9S) for easy commissioning and part interchange, or a uniquely coded actuator (DX-K9D) that is only accepted by its paired switch, raising resistance to defeat by a spare actuator.
Compact 30×30 mm all-metal body
The rugged, all-metal housing has a 30 mm × 30 mm cross-section that mounts directly on aluminum extrusion frames up to 30 mm without an adapter plate.
Cascadable to reduce controller I/O
Multiple DX-D6 switches can be wired in series (cascaded), reducing the number of input points required on the safety controller — useful for fences with several access doors sharing one safety input.
Full mounting bracket range for hinged and sliding doors
The DX-K9 actuator range is supported by rotary brackets (DX-K9-L / DX-K9-L1, for hinged doors) and slide-actuated brackets (DX-K9-T1 / DX-K9-T2, for sliding doors), in both left- and right-opening variants.
32-variant model range for exact-fit selection
Standard (R) and advanced-function (H) versions, pre-wired 3 m leads (A) or M12 connector (B) for plug-in replacement, across the full C/D lock-type and S/D coding combinations — 32 fully enumerated part numbers.
Applications
Models & Ordering Information
DX-D6 Switch Models (32 variants)
Actuators
Mounting Brackets
How to Select
- Choose C-type (mechanical lock / solenoid release) if hazardous energy remains after power-off and the door must stay locked when power is removed.
- Choose D-type (solenoid lock / mechanical release) if the application requires the door to unlock automatically for rescue or evacuation when power is removed.
- Choose between standard (R) and advanced-function (H) versions based on the application's functional requirements.
- Choose S (universal coded) actuators for easier commissioning and part interchange, or D (uniquely coded) actuators where tamper resistance against a spare actuator is required.
- Choose N (dual NPN) or P (dual PNP) outputs to match the safety controller or PLC input type.
- Choose A (direct leads, 3 m default) for new installations with fixed wiring, or B (M12 connector) for plug-in replacement and quick maintenance swaps.
- For hinged (swing) doors, select the rotary bracket DX-K9-L or DX-K9-L1; for sliding doors, select the slide-actuated bracket DX-K9-T1 or DX-K9-T2.
- The model number combines all five selection dimensions: DX-D6-[C/D][R/H]-[S/D][N/P]-[A/B], covering 32 fully enumerated part numbers.
📘 Need the full method? How to Choose a Safety Door Switch / Interlock
When NOT to specify the DX-D6 — and what to use instead
The application only needs to detect door open/closed status, with no requirement to physically hold the guard shut.
Why not: DX-D6's core function -- and added cost -- is guard locking; a monitoring-only switch is a simpler fit when no coast-down or stored-energy hazard exists after the stop command.
Use instead: DX-C1, DX-D2/DX-D3, or DX-R1 position-monitoring switches
Risk assessment calculates that the guard door may be forced with more than the rated 2000 N holding force.
Why not: 2000 N is DX-D6's rated holding force; forces above this are outside the device's published capability.
Use instead: No higher-holding-force guard-locking switch is currently cataloged; consult the factory on supplementary mechanical restraint before relying on DX-D6 alone
The panel is wired for conventional relay-based safety circuits and does not need RFID-coded actuators or NPN/PNP transistor outputs.
Why not: DX-D6 requires a DX-K9S/DX-K9D RFID actuator and outputs dual NPN or PNP signals rather than plain NC/NO contacts.
Use instead: DX-W2, DX-W3, or DX-W5 mechanical-contact guard-locking switches
The frame section the switch mounts to is larger than 30 mm and no adapter is available.
Why not: DX-D6's 30x30 mm all-metal body is sized for direct mounting on aluminum extrusion frames up to 30 mm.
Use instead: DX-W2/DX-W3/DX-W5, whose M20-conduit metal heads are not tied to a specific frame cross-section
The project requires a published PFHd or an independently issued certificate number for the safety function, not a design-basis statement.
Why not: DX-D6 is described as meeting PLe/SIL3 per ISO 14119 as a design basis; no PFHd/B10d/MTTFd figures or certificate number are published, and documents are supplied only on request.
Use instead: Request the certification package from the factory and pair DX-D6 with a DA31 or DQSRN safety relay that carries its own SISTEMA data
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.
- Operating temperature range
- PFHd / B10d / MTTFd reliability figures
- Certificate number and scope for the PLe / SIL3 / ISO 14119 design basis
- Overall body length/depth and weight beyond the 30x30mm cross-section
- M12 connector pin-out for the B (connector) variants
- Approach speed / minimum safety-distance guidance for cascaded multi-door installations
Frequently Asked Questions
What does "guard locking" mean on the DX-D6, and how is it different from a normal safety door switch?
What is the difference between the C-type and D-type DX-D6?
How much holding force does the DX-D6 provide?
What output signals does the DX-D6 provide?
Can multiple DX-D6 switches be connected together?
What actuators are compatible with the DX-D6?
What mounting brackets are available, and for what door types?
What is the mounting footprint of the DX-D6?
What connection options does the DX-D6 offer?
Is the DX-D6 certified to ISO 14119 or other safety standards?
Works Well Together
On the same machine or line, DX-D6 is typically ordered together with: Safety Relays · Safety Light Curtains · Safety Mats
DA31 Emergency-Stop Safety Relay Module
Ultra-slim 22.6 mm Category 4/PL e/SIL 3 safety relay with dual-channel PNP/NPN input and a solid-state status output.
DCE Automation Safety Light Curtain
Compact through-beam safety light curtain in a 30 x 30 mm housing: 10/20/30/40 mm beam pitch, up to 72 beams, 0.3-3 m or 0.3-6 m sensing distance, NPN/PNP output. Designed to the Type 4 architecture of IEC 61496-1/-3 and Category 4 (PLd) of ISO 13849-1.
JT14 Safety Mat (Economical)
Economical pressure-sensitive safety mat with volt-free N.O. output for large-area or custom-shape floor guarding.
Related Products in Safety Door Locks & Switches
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DX-D2 & DX-D3 Safety Door Switch
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DX-K Series Safety Door Lock Operation Keys
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DX-R1 Non-contact Safety Switch (RFID Coded)
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