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Control Head for hygienic process valves

Type 8681 / Ident No. 196415

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

Technical attributes

Type 8681
Function Control head
Valve function manual actuation Yes
Pneumatic function 1 double acting No
Pneumatic function 1 single acting Yes
QNn value (gas) 110 l/min
Temperature environment min 5 °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 voltage min 0 V
End position feedback voltage max 24 V
End position feedback current min 0 A
End position feedback current max 0.1 A
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 Screw terminal with cable feed-through
Voltage / rated voltage 12 V
Voltage / rated voltage 28 V
Supply system-internal No
Supply via BUS No
Supply via separating barrier No
AC voltage No
DC voltage Yes
Input 2 type digital transistor connection NPN No
Input 2 type digital transistor connection PNP Yes
Output 2 digital transistor connection NPN No
Output 2 digital transistor connection PNP Yes
Control interface DIP switch
Mounting type 3rd Party actuator
Protection type (IP max. with suitable connector) 65/67
Weight 0,800000 kg
Weight 0,800000 kg
Certification type
Certification number
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Applications & Tools

CAD Model

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Language / Country
3D_ANIMATION 3D-Animation - 8681 3D-PDF-DE-PV-C8681_pdf.pdf 3.8 MB DE
3D_ANIMATION 3D-Animation - 8681 3D-PDF-EN-PV-C8681_pdf.pdf 3.8 MB EN
ABD EU-DoC|EU Declaration 1000206862-B_8681_EU-DoC.pdf 1 MB EN,FR,DE
SOW EDS File A.04 8681_EDS_140930.zip 52 kB
DTS 8681, 869x, 879x Adaptionen DS8681-InstallKits-DE-DE.pdf 4.3 MB DE / DE
DTS 8681, 869x, 879x Install Kits DS8681-InstallKits-EU-EN.pdf 4.3 MB EN / EU
DTS Control Head DS8681-Standard-CA-EN.pdf 3 MB EN / CA
DTS Steuerkopf DS8681-Standard-DE-DE.pdf 896.2 kB DE / DE
DTS Control Head DS8681-Standard-EU-EN.pdf 895.1 kB EN / EU
DTS Control Head DS8681-Standard-US-EN.pdf 3 MB EN / US
MISC Flyer Control Head Type 8681 150.1 kB EN / EU
MAN Additional Information Ex MA6013-CodePX01-03-EU-ML.pdf 234.6 kB EN,FR,DE / EU
MAN Replacement Control Head MA8681-Conversion-EU-ML.pdf 2.9 MB EN,FR,DE / EU
MAN Steuerkopf MA8681-Quickstart-EU-ML.pdf 1.6 MB EN,FR,DE / EU
MAN Steuerkopf MA8681-Standard-DE-DE.pdf 3 MB DE / DE
MAN Control Head MA8681-Standard-EU-EN.pdf 3 MB EN / EU
MAN Tête de commande MA8681-Standard-EU-FR.pdf 3.1 MB FR / EU
MAN Manual for Service Software MA8681-Supplem.-SW-EU-ML.pdf 6.1 MB EN,DE / EU
MAN USB-Interface MA8694-Supplement-EU-ML.pdf 2 MB EN,FR,DE / EU
SOW PC-Programm Typ 8681 2.18 Setup_PCTool8681_2_18_0_0_160504.zip 1.5 MB