The Vershoven A24ZB/AL-Basic (manufacturer's part number 01.12000) is a weatherproof industrial telephone designed specifically for use in demanding environments. It is a special-purpose telephone with an integrated programmable keypad and VA handset cord, compatible with any standard telecommunication system. The primary function of the device is to serve as an alarm telephone: when the handset is lifted, it automatically dials a pre-programmed number, making it ideal for emergency call and security applications.

Applications
This telephone is suitable for use in dusty, humid, or outdoor environments. It is ideal for use in production halls, warehouses, outdoor areas of industrial facilities, or other locations where high mechanical and climatic resistance is required. The weatherproof design ensures reliable operation even under extreme conditions.

Functions and Features in Detail
The A24ZB/AL-Basic features an integrated programmable keypad that allows storage of a designated alarm number. Once the handset is lifted, the device automatically initiates dialing of the programmed number. The VA handset cord ensures a secure and durable connection between the handset and the unit. The terminal blocks are designed for cable cross-sections from 0.08 to 2.5 mm² and support single, multi, and fine-strand cables. The M16 cable gland allows secure attachment of cables with diameters from 5 to 10 mm. Additionally, blind plugs in M12 and M16 sizes are included to seal unused connections.

Technology Explained Simply
The enclosure protection rating IP66 means the device is dust-tight and protected against water jets from any direction. This makes it suitable for outdoor use or in humid indoor environments. The operating temperature range is from -20°C to +55°C, enabling use in various climatic regions. The storage temperature range is -40°C to +70°C, ensuring the device remains undamaged even when stored under extreme temperatures. The maximum relative humidity is 95%, ensuring reliable operation in humid environments. The enclosure is made of polyamide, a robust and durable plastic that resists mechanical stress and chemical exposure.

Compatibility and Accessories
The telephone is compatible with all standard telecommunication systems. It can be directly connected to existing telecommunication infrastructure without requiring additional adapters or special configurations. The integrated programmable keypad allows individual setting of the alarm number. No specific accessories are mentioned in the sources; however, blind plugs are included in the delivery scope to seal unused connections.

Mounting and Installation
Mounting is done via the integrated M16 cable gland. The terminal blocks allow flexible connection with various cable types. The handset cord is fitted with an M12Flex connector, ensuring a secure and weather-resistant connection. Installation does not require special tools, but proper securing of cables and glands is necessary to maintain the IP66 protection rating.

Operational Advantages
The A24ZB/AL-Basic offers high reliability in demanding environments. The automatic dialing of the alarm number upon lifting the handset reduces response time in emergencies. The weatherproof design and robust construction ensure long service life and low maintenance costs. Compatibility with standard telecommunication systems simplifies integration into existing setups without additional investments.