127 Function Fittings 01 // Fittings Level 3 reduit / EN_Level 4 sans numero Pneumatic Sensor Fittings Sensor Fittings Component Materials Technical Characteristics The sensor produces a pneumatic or electric output signal when the pressure drop in the exhaust chamber of the cylinder goes below their back pressure threshold. Ø metric: 4 mm • Compatible Fluids: Compressed air • Working Pressure: 3 to 8 bar • Working Temperature: -15°C to +60°C • Back Pressure: 0.85 to 1 bar • Switching Time: Model 7818: 3 ms • Open/Closed Contact: Model 7828: 2A / 0-48 V 2A / 250 V 50 Hz Silicone-free Regulations • REACH • RoHS • PED Advantages • Detection of end of cylinder rod stroke With Pneumatic Output Totally pneumatic installation 2 possible installations: • Supplied with permanent pressure (P1): produces a pneumatic signal when the back pressure threshold is reached • Supplied from the control valve-cylinder circuit on the opposite side: no unexpected pneumatic signal (S) can appear during pressurisation due to the actuating pressure which supplies the sensor fitting (P1) With Electrical Output • Combined electrical and pneumatic installation • Installation with continuous electrical supply only (BU) • Guarantees an electrical signal when the back pressure threshold is reached Body: technical polymer Seal: NBR Screw: brass Pneumatic Installation Diagram Cylinder in Operation Cylinder in Final Position Operation Cylinder Pressure Cycle Installation Diagram S1 S2 P1 P P1 P P' 0 P P P' S1 S2 P1 P P1 P P' P P Pressure System Control valve reversal Start of cylinder stroke Exhaust back pressure Dynamic pressure End of cylinder stroke Back pressure threshold of the sensor fitting Time S1 and S2: output signals Depending on model, S1, S2 and P1 may be pneumatic or electric. See the installation diagrams opposite. P1: Pilot signal P: Dynamic pressure P': Exhaust back pressure Electrical Installation Diagram / BN / BN / BK / BK To the control valve Piston Diaphragm / BN / BN / BK / BK To the control valve Piston Diaphragm Connection via 3 core 0.5 mm² cable, 2 meters long. Contactor: 5A / 250 V or 5W / 48V P': Exhaust back pressure P: Dynamic pressure P1: Sensor supply pressure S: Output signal
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