Burkert-Type 8691 - Control head for decentralised automation of ELEMENT process valves

Burkert – Type 8691 Control Head for Decentralized Automation of Process Valves (Type ELEMENT)

จุดเด่นของ Type 8691

Colour illuminated status display
Integrated pilot air duct in the actuator
With ATEX II cat. 3G/D / IECEx approval
Contact-free inductive valve position registration (Teach function)
Fieldbus interface AS-Interface, IO-Link or Bürkert system bus (büS)

หมวดหมู่: BURKERT ASi, BURKERT IO-Link, EDIP, EDIP Capable Products, Hygienic/Pharma/Special Process Valves, Industrial Communication, On/Off, Pneumatic Control, Process and Control valves, Process Valves Automation, Shut-off valves(on-off), T- Valves, Tank Bottom Valves

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Control head for decentralised automation of ELEMENT process valves

The control head Type 8691 is designed for decentralized automation of ELEMENT Type 21xx pneumatic process valves. The registration of the valve position is done through a contact-free analogue sensor element, which automatically recognises and saves the valve end position through the Teach function during start-up. The integrated pilot valve controls single or double-acting actuators. As an option a communication interface, AS-Interface, IO-Link or büS (based on CANopen) can be chosen.

The design of the control head and the actuator enables an internal control air routing without external tubings. Besides the electrical position feedback, the status of the device is shown directly on the control head itself through coloured powerful LEDs, even in difficult ambient conditions.

The housing is easy to clean and features proven IP protection and chemically resistant materials for use in hygienic processing in food, beverage and pharmaceutical industries. Focused on wash down applications, the IP protection of the housing is supported by a positive pressure inside the control head. Combined with Bürkert ELEMENT actuators, the pneumatic actuating system enables spring chamber aeration that avoids actuator chamber contamination from the environment.

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type 8691

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General Technical Data

Product properties
Profile	S-B.A.E (A/B-Slave, max. 62 slaves/master) certificate no. 77601 acc. to Specification V3.0 Master class: M3, M4 S-B.F.F (standard slave, max. 31 slaves/master) Master class: M0, M1, M2, M3, M4
Electrical data
Operating voltage	26.5…31.6 V DC, UL: NEC Class 2
Via Bus cable	Acc. to specification
Isolation from bus signal	On request
Protection class	3 acc. to DIN EN 61140
Max. current consumption	120 mA
Current consumption in standard operation	90 mA (acc. to current reduction; valve + 1 end position achieved)
Device with external power supply	External power supply (The power supply unit must contain one secured disconnection acc. to IEC 364 – 4 – 41 (PELV or SELV))
Max. current consumption	55 mA (acc. to current reduction ≤ 30 mA)
Max. current consumption from ASI	55 mA
Contact rating	≤ 1 W via AS-Interface
Watchdog function	Integrated
Sensor operating voltage	24 V ± 10 % (via AS-Interface)
Current carrying capacity	≤ 50 mA short circuit proof
Switching level, high	≥ 10 V
Input current, high	Limited to 6.5 mA
Input current, low	≤ 1.5 mA

*For selecting thecorrect product please refer to the technical data, images and notes for proper use according to the data sheet, or contact Flu-Tech directly.