ThinkTop Basic


The ThinkTop Basic is designed to ensure optimum valve control in conjunction with Alfa Laval butterfly, single-seat and Mixproof valves and it is compatible with all major PLC systems (Programmable Logic Controller) with a digital PNP/NPN interface. It is for use in food, dairy and brewery installations and in biopharmaceutical applications. The ThinkTop Basic fits all air operated valves from Alfa Laval.

Working principle

The ThinkTop Basic is a basic control head including sensor board and solenoid valves to control processing valves. It is used to control and supervise pneumatic valves and is mounted on top of the valve. It receives signals from a PLC to control the solenoid valve and it sends the valve status feedback signals back to the PLC. To adapt the sensor board to the specific valve, the users make a simple set-up by using local keys.


How It Works


The ThinkTop Basic sensing and control unit is a uniform modular control head that consists of a proven no-touch, set-and-forget sensor system with light-emitting diodes (LEDs), solenoid valves and valve control sensor board for connection to any PLC (Programming Logic Controller) system.

Operating principle

The sensor system accurately detects valve stem movement, the position of the valve at any given time, with an accuracy of ± 0.1mm through the use of microchip sensors. To locate the current valve position, sensor chips inside the sensor board calculate the angle between the axial magnetic field produced by an indication pin mounted on the valve stem.

The sensor system receives signals from the PLC system to energize or de-energize the air-operated valve. It then transmits feedback signals indicating the main valve position and condition back to the PLC system. Up to three solenoid valves convert the sensor signals from electrical current into mechanical energy to energize or de-energize the air-operated valve, using the physical stimulus of an indication pin mounted on the valve stem.

Each control head fits any Alfa Laval sanitary valve and has a valve tolerance band with a default tolerance. This boosts eliminates the need to re-adjust the sensors, boosts productivity and effectively prevents operating errors.

LEDs conveniently display the main valve position, solenoid activation, setup and local fault indication on the control head.

Integrated communication

Two types of interfaces can connect ThinkTop Basic to any PLC system and may be used in any combination:

• Digital interfaces
• AS-Interface (with 62 nodes)

For more information, please refer to Documentation.

Ease of installation

ThinkTop Basic fits onto all Alfa Laval sanitary actuators equipped with mushrooms. Installation is straightforward; no special expertise, adapters or tools are required. Simply press a five-button startup sequence to initiate foolproof manual setup.

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