T20 E – T21 E – T21 EF
Key operated push-buttons for embedding or on column System type
Simple pulse generatorsFamily models
| Model | Description | Item code |
|---|---|---|
| T20 E | Key operated button | 401012 |
| T21 E | Key operated button | 401013 |
| T21 EF | Key operated button | 401016 |
Dimensions and technical specifications
| Model | T20 E | T21 E | T21 EF |
|---|---|---|---|
| Installation type | wall | ||
| Microswitches for exchange | 1 | 2 | |
| Contact ratings | 10 A / 250V | ||
| Protection class | IP54 | ||
| Operating ambient temperature | -20°C ÷ +55°C | ||
Frequently Asked Questions
These key-operated control devices allow authorised users to operate automated gates, barriers, doors, and other access control systems using a physical key.
While both serve similar access control functions, the models may differ in configuration, contact arrangement, and mounting design to suit different installation requirements.
A key switch provides secure manual control and is particularly useful in locations where remote transmitters or keypad access are not preferred.
Yes. The T20 E, T21 E, and T21 EF are designed for gate automation environments and can be installed outdoors when installed according to the manufacturer's recommendations.
Yes. Additional authorised keys can typically be supplied, allowing approved personnel to access and operate the system when required.
