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bürkert
 

    Control head for decentralized automation of hygienic process valves

    Type 8681 / Ident No. 196443

    Produkt-Foto Typ 8681

    The depiction of the products may differ from the actual specific design.

    • Produkt-Foto Typ 8681
    • Produkt-Foto Typ 8681

    Control head type 8681

    • Universal attachment for hygienic process valves
    • Contactless position measurement system with 3 switching points (Teach-In function)
    • Coloured status display
    • Manual override operative with closed housing
    • Fieldbus AS-Interface or DeviceNet (option)

    For selecting the correct product please refer to the technical data, images and notes for proper use according to the data sheet.

    Product description

    The control head Type 8681 is optimized for decentralised automation of hygienic process valves. Thanks to its universal adapter it can be combined with all normal commercial butterfly valves, ball valves, single and double seated valves. With a decentralised automation concept, the control head takes over all pneumatic actuation, feedback and diagnostic functions including field bus communication. 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. Depending on the process valve type, up to 3 pneumatic actuator chambers can be controlled independently from each other. The switching speeds of both movement directions can be set separately. A built-in check valve prevents incorrect switching of process valve actuator chambers which could result from back-pressure. The process valve switching positions are detected by an inductive, analogue position sensor and reported to the PLC system. Up to 3 switching points can be adjusted automatically by a Teach-In function. Additionally a fourth switching position can be read in and fed back via an external inductive proximity switch. The coloured status display signals the particular process valve switching position or indicates a diagnostic function such as maintenance required status or fault conditions. The pilot valves are equipped with a manual override. If the device housing is closed, the patented magnetically encoded manual override tool can be used to open the process valve from the exterior. Bus communication is available with AS-interface or DeviceNet.


    Commodity Codes
    90268020
    Country
    DE

    Technical attributes

    Name
    Value
    Unit
    Type 8681
    Product sub-group Control head / Position indicator
    Function Control head
    Valve function manual actuation Yes
    Pneumatic pilot valve 1 6144
    Pneumatic pilot valve 2 6144
    Pneumatic function 1 double acting No
    Pneumatic function 1 single acting Yes
    Pneumatic function 2 double acting No
    Pneumatic function 2 single acting Yes
    Pneumatic function 3 double acting No
    Pneumatic function 3 single acting Yes
    Valve diameter 4 mm
    Valve 2 diameter 4 mm
    Valve 3 diameter 4 mm
    QNn value (gas) 110 l/min
    QNn value 2 (gas) 110 l/min
    QNn value 3 (gas) 110 l/min
    Temperature environment min -10 °C
    Temperature environment max 55 °C
    End position feedback internal 3 PCE
    End position feedback external 1 PCE
    End position feedback type Inductive displacement transducer PNP
    End position feedback DC voltage Yes
    End position feedback AC voltage No
    End position feedback top yellow
    End position feedback bottom green
    Displacement transducer type internal linear
    Displacement transducer signal digital
    For Actuator size 40 mm Yes
    For Actuator size 50mm Yes
    For Actuator size 63mm Yes
    For Actuator size 70mm Yes
    For Actuator size 80mm Yes
    For Actuator size 90mm Yes
    For Actuator size 100mm Yes
    For Actuator size 125mm Yes
    For Actuator size 130mm Yes
    For Actuator size 175mm Yes
    For Actuator size 225mm Yes
    Main valve with integrated filter Choke with screw slot
    Port connection 1 type Inner thread
    Port connection 1 thread type G
    Port connection 1 thread marking 1/4
    Port connection 2 type Inner thread
    Port connection 2 thread type G
    Port connection 2 thread marking 1/8
    Port connection 3 type Inner thread
    Port connection 3 thread type G
    Port connection 3 thread marking 1/4
    Electrical connection sort Plug - M12
    Electrical connection type male
    Electrical connection wire length 100 mm
    Electrical connection material Stainless steel
    Voltage / rated voltage 29.5 V
    Voltage / rated voltage 31.6 V
    Supply system-internal No
    Supply via BUS Yes
    Supply via separating barrier No
    AC voltage No
    DC voltage Yes
    Input 1 type digital serial (bus)
    Output 1 type digital Serial (bus)
    Communication interface protocol AS-i
    Control interface DIP switch
    Mounting type 3rd Party actuator
    Protection type (IP max. with suitable connector) IP65/67
    Weight 0,860000 kg
    Show full table Collapse table

    Downloads

    Data Sheets

    Description
    Filesize
    Language / Country
    DTS Type 8681 data sheet | control head for automation of hygienic process valves 1.6 MB EN / EU
    DTS Type 8681 data sheet | control head for automation of hygienic process valves [CA units] 3 MB EN / CA
    DTS Type 8681 data sheet | control head for automation of hygienic process valves [US units] 3 MB EN / US
    DTS Type 8681 data sheet | installation kits for hygienic process valves 5.8 MB EN / EU
    DTS Typ 8681 Datenblatt | Adaptionen für hygienische Prozessventile 5.8 MB DE / DE
    DTS Typ 8681 Datenblatt | Steuerkopf für hygienische Prozessventile 1.6 MB DE / DE

    User Manuals

    Description
    Filesize
    Language / Country
    MAN Additional manual Type 6013 | PX01 - PX03 Use in the explosion-hazard area 125 kB EN,FR,DE / EU
    MAN Additional manual Type 8681 8694 869X 879X | USB Interface for serial communication 2.1 MB EN,FR,DE / EU
    MAN Operating Instructions Type 8681 | Control Head 3 MB EN / EU
    MAN Quickstart Type 8681 | PC service program for control head Type 8681 6.1 MB EN,DE / EU
    MAN Quickstart Type 8681 | Tête de commande 1.6 MB EN,FR,DE / EU
    MAN Service manual Type 8681 | Replacement control head Type 1066 with control head Type 8681 2.9 MB EN,FR,DE / EU
    MAN Software manual | Central configuration management 1.3 MB EN / EU
    MAN Bedienungsanleitung Typ 8681 | Steuerkopf 3 MB DE / DE
    MAN Manuel de service Type 8681 | Tête de commande 3.1 MB FR / EU
    MAN Manuel du logiciel | Gestion centrale de la configuration 1.3 MB FR / FR
    MAN Software-Anleitung | ZentraleKonfigurationsverwaltung 1.3 MB DE / DE

    Software

    Description
    Filesize
    Language / Country
    SOW EDS File A.04 52 kB ML
    SOW PC-Programm Typ 8681 2.18 1.5 MB ML

    EU Declaration

    Description
    Filesize
    Language / Country
    ABD EU-DoC|EU Declaration 1 MB EN,FR,DE

    Interactive Animation

    Description
    Filesize
    Language / Country
    3D_ANIMATION 3D-Animation - 8681 3.8 MB DE
    3D_ANIMATION 3D-Animation - 8681 3.8 MB EN

    Flyers and Catalogues

    Description
    Filesize
    Language / Country
    MISC Flyer Best Practice - Fruit syrup production process is sweeter thanks to smart valve control from Bürkert. 447.2 kB EN / GB
    MISC Flyer Best Practice - New control heads in the Fromagerie Bel dairy plant for consistent quality cheese. 352.5 kB EN / GB
    MISC For hygienic process valves. 150.1 kB EN / EU

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