ThinkTop® Basic Digital 8 - 30 VDC PNP/NPN. Электронный блок клапана ALFA LAVAL. Цена: 3000 руб. ThinkTop® Basic Digital 8 - 30 VDC PNP/NPNApplicationThinkTop BasicThe ThinkTop® Basic is designed to ensure optimum valve control in conjunction with Alfa Laval sanitary 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 PrincipleThe ThinkTop® Basic is a basic control head including sensor unit 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 unit to the specific valve, the users make a simple set-up by using local keys. Sensor SystemThe sensor system is the well known and approved "No Touch" principle from the ThinkTop® platform without any mechanical sensor adjustments. A magnet is mounted on the valve stem and the magnetic field (axial) is detected by build in sensor chips inside the sensor unit. The measuring angle from each chip is used in calculations to locate the current position of the valve stem. There can be programmed 2 PNP or 2 NPN feedback signals. The selection of PNP or NPN is done by a jumper on the sensor board itself. The LEDs are constantly indicating the status of the unit: Valve position, solenoids activated, set-up and local fault indication. Feedback SignalsOutput signals from the sensor unit to the connected digital interface (PLC). Nominal voltage: . . . . . . . . . . . . . . . Same as connected to the ThinkTop® Basic. Load current: . . . . . . . . . . . . . . . . . . 50mA typical, 100mAmax. Voltage drop: . . . . . . . . . . . . . . . . . . Typical X V at 50 mA. Sensor Detection SystemSensor accuracy. . . . . . . . . . . . . . . +/- 0, 1 mm. Tolerance band: . . . . . . . . . . . . . . . . +/- 5 mm. Distance tomagnet: . . . . . . . . . . . . . 5 +/- 3 mm. Stroke length: . . . . . . . . . . . . . . . . . 0, 1-80 mm. PNP/NPN PolarityPNP (sourcing) or NPN (sinking) function is selected by a jumper in terminals 9 and 10. Jumper present = PNP (standard). If changing to NPN remove the jumper and make a power recycle. A power recycle is always required when changing this function. Solenoid Valves0 to 3 solenoid valves in each unit possible. Type: . . . . . . . . . . . . . . . . . . . . . . . 3/2 or 5/2 port (only possible with one 5/2 port). Air supply: . . . . . . . . . . . . . . . . . . . . 300-900 kPa (3-9 bar). Filtered air, max. particles of dirt: . . . . . 0, 01 mm. Max. flow: . . . . . . . . . . . . . . . . . . . . 180 l/min. Throughput: . . . . . . . . . . . . . . . . . . ¸ 2, 5 mm.
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