Safety Door Locks & Switches

Guard locking interlocks, RFID and magnetic coded safety switches for machine doors and fences.

Choose a Safety Interlock Switch by Guard Function

A safety interlock switch either monitors whether a machine guard is closed, or monitors and physically locks it. Use monitoring-only when opening the guard removes access before a hazard can remain; use a guard-locking switch when motion, pressure, heat or stored energy continues after the stop command and the door must stay closed until release is permitted.

This category includes mechanical tongue switches, magnetic coded and RFID non-contact switches, solenoid guard locks, actuator keys and a mechanical safety-door bolt. The first decision is monitoring versus locking; the second is contact, magnetic or RFID actuation.

Safety interlock switch selection between guard monitoring and guard locking for machine safety doors — Monitoring confirms door position; guard locking also prevents opening while the hazard remains.

DX-C1 Magnetic Coded Safety Switch

Non-contact coded-magnet safety switch with 17 mm sensing range and high misalignment tolerance for guard doors.

DX-D2 & DX-D3 Safety Door Switch

Mechanical NC/NO safety interlock switch, IP67, 1,000,000-cycle mechanical life, no locking function.

DX-D6 Guard Locking Safety-Door Switch

Guard locking safety-door switch: 2000 N holding force, redundant dual outputs, RFID-coded actuators.

DX-K Series Safety Door Lock Operation Keys

11-model range of fixed and adjustable operation keys for DX-W2/W3/W5 and DX-D2/D3 safety door interlock switches.

DX-R1 Non-contact Safety Switch (RFID Coded)

Non-contact RFID-coded safety switch, dual-channel PLe/Type 4 output, 0-10mm switch-on, cascadable, 8 NPN/PNP models.

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

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

DX-W3 Safety Door Lock

Compact mechanical-contact safety door lock: 1300 N holding force, 2 contact blocks, 6 NC/NO configurations, IP67.

DX-W5 Safety Door Lock (Guard Locking Interlock Switch)

Solenoid safety door lock with 6 gold-plated contacts, 4 configurations, 1300 N holding force and IP67 protection.

Photo on request

DXL Safety Door Bolt (DXL-A / DXL-B)

Purely mechanical safety door bolt pre-drilled to mount DX-W2/W3/D2/D3 interlock switches directly.

Safety Door Switch and Guard Locking Range

For mechanical position monitoring without locking, compare DX-D2/DX-D3. For non-contact monitoring, DX-C1 uses coded magnetic actuation and DX-R1 uses RFID coding with dual-channel transistor outputs. For mechanical-contact guard locking, compare DX-W2, DX-W3 and DX-W5 by contact arrangement and holding force.

DX-D6 combines RFID-coded actuation, guard locking, redundant dual NPN or PNP outputs and a compact 30 × 30 mm metal body. It is the model-owned page for a compact electronic guard locking safety switch.

Need	Starting family	Published distinction
mechanical door-position monitoring	DX-D2 / DX-D3	NC/NO contacts, no locking function
magnetic non-contact monitoring	DX-C1	coded magnet, up to 17 mm published sensing distance
RFID non-contact monitoring	DX-R1	universal or uniquely coded, dual NPN/PNP output
mechanical-contact guard locking	DX-W2 / W3 / W5	solenoid lock options and 1300 N published holding force
compact electronic guard locking	DX-D6	RFID actuator, 2000 N, 30 × 30 mm body

How the DX-D6 Guard Locking Sequence Works

DX-D6 separates three facts that are often confused: the actuator is present at the switch, the locking mechanism is engaged, and the redundant output signals are available to the safety controller. The controller evaluates those signals; the switch does not directly remove power from the machine load.

C-type is mechanical lock with solenoid release (power-to-release). D-type is solenoid lock with mechanical release (power-to-lock). The correct loss-of-power behaviour depends on whether the machine retains a hazard after power is removed, so that choice belongs to the risk assessment rather than a generic preference.

DX-D6 guard locking safety door switch sequence from RFID actuator detection and lock confirmation to safety controller — Actuator present + lock state → redundant safety signals → safety controller; the controller owns the machine stop circuit.

Magnetic, RFID or Mechanical Safety Switch?

Magnetic coded switches tolerate guard misalignment and have no tongue entering a head. RFID-coded switches add universal- or uniquely-coded actuator choices and are useful where defeat resistance and electronic outputs matter. Mechanical tongue switches remain practical where visible positive actuation, conventional contacts and familiar maintenance procedures lead the specification.

No technology is automatically correct for every door. Record door type, alignment movement, need for locking, desired coding, output style, ingress requirement and the safety function's required performance before selecting a model.

From Door Switch to Safety Relay

A door switch supplies the guard state; a safety relay or safety controller evaluates the safety channels and controls downstream contactors. The DA31 safety relay module includes a selectable safety-door input mode and accepts dual-channel PNP or NPN signals. The safety relay category compares DA31 with DQSRN.

For exact terminal wiring, validate the switch variant, relay input mode and complete machine safety circuit together. Category text is not a substitute for the model wiring document or the machine risk assessment.

Send the door type, whether the hazard coasts after stop, required holding force, coding preference and controller input type through the inquiry form.

Frequently Asked Questions

What is the difference between a safety interlock switch and a guard locking switch?

An interlock switch monitors whether the guard is closed. A guard locking switch also holds the door shut until release is permitted.

When does a machine safety door need guard locking?

Use guard locking when a hazardous condition can remain after the stop command, such as coast-down, stored pressure, heat or residual motion, and the risk assessment requires access to be delayed.

What is a magnetic safety switch used for?

A magnetic coded safety switch monitors a movable guard without mechanical contact and can tolerate more alignment variation than a tongue-operated switch.

What is the difference between universal and uniquely coded RFID actuators?

A universal-coded switch accepts the matching actuator type; a uniquely coded version recognises its paired actuator, increasing resistance to simple substitution.

Does DX-D6 directly switch the machine motor?

No. Its redundant transistor outputs are evaluated by a safety controller or safety relay; downstream safety contacts or contactors remove power from hazardous functions.

How do I choose power-to-release or power-to-lock?

Choose from the risk assessment and the safe state on loss of power. Consider whether a hazard remains after power-off and whether emergency escape or process protection must be maintained.