Omron D4DS-K2 — Vertical Operation Key for D4NS/D4NL/D4BL
SKU: D4DS-K2USD 1.50
Vertical-mount operation key (tongue actuator) for Omron D4NS, D4NL, D4BL and D4GL safety-door switches, metal construction, IP67 when mated.
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Product Overview
The D4DS-K2 is a vertical-mount operation key — the metal tongue that inserts into the head of an Omron D4NS, D4NL, D4BL, or D4GL guard-lock safety-door switch. It is not a switch itself: the actual switching logic, contact arrangement, and solenoid lock are inside the D4NS / D4NL / D4BL / D4GL body. The D4DS-K2 is the actuator that the switch detects. The "-K2" suffix specifies vertical mounting orientation: the key is inserted vertically into the switch head from above (top-insertion) or from below, depending on how the switch head is rotated.
How the D4DS-K2 fits in the D4DS family
Omron offers four operation-key orientations in the D4DS series: D4DS-K1 (horizontal mounting, the default for most hinged guard doors with a vertical key insertion axis), D4DS-K2 (vertical mounting, this SKU), D4DS-K3 (adjustable mounting, horizontal direction), and D4DS-K5 (adjustable mounting, horizontal/vertical, the most flexible). Pick the D4DS-K2 when the key's insertion axis must be vertical — typically because the door swings out horizontally and the switch sits above or below the door's open position. Pick the D4DS-K1 when the door swings open vertically (such as a lift-up guard on a small machine) and the key inserts horizontally into the switch.
Switch compatibility and holding force
The D4DS-K2 is fully compatible with the D4NS (key-operated, no solenoid lock, plastic housing, 1/2/3 or 4 contacts), D4NL (key-operated with solenoid lock, plastic housing, 4 or 5 contacts), and D4BL (key-operated with solenoid lock, die-cast metal housing, heavier duty) families. It is also mechanically compatible with the older D4GL family. Holding force is determined by the switch, not by the key: with a D4NS the holding force is approximately the switch's contact-block retention, typically less than 700 N; with a D4NL the holding force is 1,300 N min; with a D4BL the holding force is 700 N min.
Installation notes
The D4DS-K2 is supplied with two M5 × 16 one-way screws (drive in only, cannot be backed out) and a mounting template. Bolt the key to the door's swinging edge with the one-way screws so it cannot be removed by an operator. The key's insertion depth into the switch is 20 mm min; the key's allowable overshoot is 4 mm. When the door closes, the key must fully enter the switch head with at least 4 mm of insertion margin so that door sag or misalignment does not cause a fault.
Key Features
- Vertical-mount operation key for D4NS / D4NL / D4BL / D4GL switches
- Metal construction
- Mounting screws are one-way
- Insertion depth 20 mm min, overshoot tolerance 4 mm
- Compatible with 4-contact D4NS and 5-contact D4NL switch heads
- IP67 rating when mated with switch head
- Field-replaceable without removing the switch from the panel
- Five-direction key insertion on the switch head accepts vertical, horizontal, top-inserted keys
- SKU: D4DS-K2
- Series: D4DS (Operation Keys for D4NS / D4NL / D4BL)
Best-Fit Applications
- Vertical-mount operation key on a hinged guard door of a packaging machine
- Top-inserted operation key on a robotic cell door swinging horizontally
- Bottom-inserted operation key on a hinged access panel of an assembly cell
- Field replacement for a worn operation key on an existing D4NS or D4NL installation
Buying Checklist
- Pick D4DS-K2 for vertical-mount key insertion; pick D4DS-K1 for horizontal-mount
- Pick D4DS-K2 when the door swing is horizontal and the switch is mounted above or below
- Pick D4DS-K5 if the mounting orientation is not yet decided
- Pair with D4NS for light-duty plastic-body guard doors
- Pair with D4NL for high-holding-force solenoid-locked guard doors
- Pair with D4BL for heavy-duty metal-body solenoid-locked doors
Technical Specifications
| Model | D4DS-K2 |
|---|---|
| Series | D4DS (Operation Keys for D4NS / D4NL / D4BL) |
| Type | Vertical-mount operation key (tongue actuator) |
| Compatible Switches | D4NS, D4NL, D4BL, D4GL |
| Mounting Orientation | Vertical (inserts from above or below) |
| Material | Metal (steel) |
| Insertion Depth (min) | 20 mm |
| Key Overshoot Tolerance | 4 mm |
| Operating Temperature | Determined by switch: D4NS/D4NL -30 to +70 °C, D4BL -10 to +55 °C |
| Certifications (with switch) | EN ISO 13849-1, EN 60947-5-1, UL, CSA, TÜV |
Resources & Downloads
FAQ for D4DS-K2
Is the D4DS-K2 a switch or just a key?
The D4DS-K2 is the operation key only — the metal tongue that inserts into the switch head. The actual switching logic, contacts, and (if applicable) solenoid lock are in the D4NS, D4NL, D4BL, or D4GL switch body. The key is field-replaceable: a worn or damaged D4DS-K2 can be swapped without replacing the whole switch, which makes it the wear part, not the switch itself.
What's the difference between D4DS-K1, D4DS-K2, D4DS-K3, and D4DS-K5?
Four mounting orientations of the same key. D4DS-K1 = horizontal mounting (key inserts sideways into the switch). D4DS-K2 = vertical mounting (key inserts from above or below, this SKU). D4DS-K3 = adjustable mounting in the horizontal direction only. D4DS-K5 = adjustable mounting in horizontal or vertical direction (the most flexible). All four are mechanically and electrically compatible with the D4NS, D4NL, D4BL, and D4GL switch heads.
What switch holding force will I get with the D4DS-K2?
Holding force is determined by the switch, not the key. With a D4NL switch the holding force is 1,300 N min (the strongest). With a D4BL switch it is 700 N min. With a D4NS switch (no solenoid lock) the holding force is contact-block dependent, typically lower than 700 N. Pick the switch family based on the force your guard door requires; pick the key family (D4DS-K1/K2/K3/K5) based on the door's swing orientation.
Can I use the D4DS-K2 with a non-Omron switch?
The D4DS-K2 is dimensioned specifically for Omron D4NS, D4NL, D4BL, and D4GL heads. While some third-party safety-door switches share a similar mechanical interface, the exact key dimensions and insertion tolerances differ — using a D4DS-K2 in a non-Omron switch may cause incorrect contact actuation or premature wear. For non-Omron switches, use the key supplied with the switch or the manufacturer's listed cross-reference.
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