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ABB Flexible key to Safety Interlock Switch
ABB MKey Key 4 2TLA050040R0221 is a flexible 316 stainless steel actuator with a plastic housing for compatible ABB MKey5 safety interlock switches used on industrial machine guards, doors and hatches.
£24.84
Why Choose the ABB MKey Key 4 Flexible Actuator?
The ABB MKey Key 4, part number 2TLA050040R0221, is a flexible actuator key for ABB MKey5 safety interlock switches, designed for reliable mechanical actuation of safety switches on movable machine guards, doors and hatches. It combines a durable 316 stainless steel key with a plastic housing, providing the flexibility required for guarding applications where alignment or the opening radius makes a rigid actuator less suitable.
Designed specifically for the ABB Jokab Safety MKey5 family, the MKey Key 4 is suitable for MKey5, MKey5+, MKey5 SSH, MKey5+ SSH, MKey5Z and MKey5+Z safety switches. When installed on the moving part of a guard, the actuator enters the compatible MKey switch as the guard closes, enabling the interlock to monitor the guard position.
The flexible design is particularly useful on doors and hatches with smaller opening radii, with ABB identifying flexible MKey keys as suitable for opening radii of approximately 100–175 mm. The actuator angle can be adjusted by screw, helping accommodate the movement and alignment requirements of different machine guarding arrangements.
Key Advantages
- Genuine ABB flexible actuator for MKey5 safety interlock switches.
- Flexible design accommodates machine guards with smaller opening radii.
- Durable 316 stainless steel key for industrial applications.
- Plastic actuator housing provides a lightweight mounting arrangement.
- Adjustable actuator angle helps accommodate different guard geometries.
- Compatible with multiple ABB MKey5 safety switch variants.
Key Features
- ABB Jokab Safety MKey Key 4 actuator.
- Flexible key design for safety interlock switches.
- Key manufactured from 316 stainless steel.
- Plastic housing.
- Actuator angle adjustable by screw.
- Suitable for doors and hatches with an opening radius of approximately 100–175 mm.
- Compatible with MKey5, MKey5+, MKey5 SSH, MKey5+ SSH, MKey5Z and MKey5+Z.
- Actuator mounting designed for M5 fixings.
Flexible Actuation for MKey5 Machine Guard Interlocks
Separate-actuator safety interlock switches use an actuator mounted on the movable guard and a switch body mounted on the fixed machine structure. Closing the guard inserts the actuator into the switch, allowing the safety system to detect that the guard is correctly positioned before machinery is permitted to operate.
The ABB MKey Key 4 adds flexibility to this arrangement by allowing the actuator to accommodate curved movement and smaller door or hatch opening radii. Its adjustable design, 316 stainless steel key and plastic housing make it particularly useful where a rigid actuator may be difficult to align consistently with the interlock switch.
Typical Applications
- Hinged machine guard doors.
- Safety hatches with smaller opening radii.
- Industrial machine access panels.
- Automated production machinery.
- Robot cell and perimeter guarding.
- Replacement or alternative actuators for compatible ABB MKey5 safety switches.
Technical Specifications
Tick the specs you need, then view products that match.
| Device Type | Guard-locking switch | |
|---|---|---|
| Product Series | ABB MKey | |
| Safety Switch Type | Tongue interlock | |
| Housing Material | Plastic | |
| Manufacturer | ABB | |
| Product range | ABB Jokab Safety | |
| Series | MKey | |
| Model | MKey Key 4 | |
| Manufacturer part number | 2TLA050040R0221 | |
| Product type | Safety interlock switch actuator | |
| Actuator type | Flexible key | |
| Key material | Stainless steel 316 | |
| Housing material | Plastic | |
| Adjustment | Actuator angle adjustable by screw | |
| Suitable opening radius | approx. 100–175 mm | |
| Compatible switches | MKey5, MKey5+, MKey5 SSH, MKey5+ SSH, MKey5Z and MKey5+Z | |
| Mounting | M5 fixing | |
| Product net weight | 0.022 kg | |
| EAN / GTIN | 7350024478488 | |
| Application | Actuation of compatible machine guard safety interlock switches | |
| HS Code | 85365080 | |
| Country of Manufacture | United Kingdom (includes NI) |
Frequently Asked Questions
What is the ABB MKey Key 4 2TLA050040R0221 used for?
The MKey Key 4 is a flexible actuator for ABB MKey5 safety interlock switches, designed to operate the interlock when a compatible machine guard, door or hatch reaches its closed position.
Which ABB MKey switches are compatible with the MKey Key 4?
The actuator is compatible with MKey5, MKey5+, MKey5 SSH, MKey5+ SSH, MKey5Z and MKey5+Z safety interlock switches.
What material is the ABB MKey Key 4 made from?
The flexible actuator uses a 316 stainless steel key with a plastic housing.
Why use a flexible MKey actuator instead of a standard key?
A flexible actuator can better accommodate the movement of hinged guards and hatches with smaller opening radii, helping maintain suitable alignment between the actuator and safety switch.
What opening radius is the ABB flexible MKey key suitable for?
ABB identifies flexible MKey actuator keys as suitable for doors and hatches with smaller opening radii of approximately 100–175 mm.
Is the ABB 2TLA050040R0221 a complete safety interlock switch?
No. The 2TLA050040R0221 is an actuator accessory and must be used with a compatible ABB MKey5 safety interlock switch.
Trusted by Machine Builders and Automation Professionals
ABB Jokab Safety MKey actuators and safety interlock switches provide flexible solutions for industrial machine guard monitoring, helping machine builders, system integrators and automation engineers implement reliable interlocking on doors, hatches and movable protective guards.
