Page 257 - Bürkert

Digital electropneumatic Positioner for the integrated
mounting on process control valves

8696 Basic version for actuator sizes
Ø 50 mm

• Digital smart positioner
• Automatic teach function
• Contact-free position sensor

• Compact stainless steel design
• Analogue feedback (option)
• Internal control air routing

Compact positioner for integrated mounting on pneumatically operated Dimensions [mm] (see datasheet for more details)
process valves. Remote setpoint adjustment via a 4-20 mA signal. Pilot valve
system without intrinsic compressed air consumption during steady state.
Classic
A contact-free continuous sensor measures the position of the valve
spindle.
Simple installation through automatic tune function and setting through
DIP-switch:
• Close tight function,
• Characteristic curves selection
C
• Reversal of effective direction
• Switching manual /automatic operation
• Binary input
Additional parametrisation options are possible through DTM devices.
A
A software interface can be used for, amongst others, linearisation of the
operation characteristics by using free programmable fixed points.
B
The valve position indication is shown through LED components.
As an option an analogue position feedback can be integrated.
A B C
Technical data 65.4 74.2 123.9
Material
Body PPS, stainless steel
Cover PC
Sealing EPDM
Power supply 24V DC +/-10% Technical data (cont.)
Residual ripple 10% Electrical connection
Setpoint setting 4-20 mA (default setting) / 0-20 mA Multipole connection M12 (8-pins), stainless steel
Output resistance 180 Ω Protection class 3 acc. to VDE 0580
Control medium neutral gases, air DIN ISO 8573-1 Conformity CE acc. to EMV2004/108/EG
Dust concentration Class 5 (<40 µm particle size) Options Analogue position feedback, 4-20 mA
Particle density Class 5 (<10 mg/m ) 3
Pressure condensation point Class 3 (<-20 °C) 1) The supply pressure has to be 0.5-1 bar above the minimum required pilot pressure for the
Oil concentration Class 5 (<25 mg/ m ) 3 valve actuator.
Ambient temperature 0 °C to +55 °C
Pilot air ports Push-in connectors (external Ø 6 mm or ¼ ”) or
Threaded ports G 1/8”
Supply pressure 0-7 bar 1)
Actuator system for single-acting actuators
Actuator series 23XX/2103 Actuator Ø 50 mm
Position detection module Contact-free, wear-free
Stroke range valve spindle 3-32 mm
Installation as required, preferably with actuator in upright
position
Type of protection IP65/67 acc. to EN 60529
(NEMA 4x in preparation)
Power consumption < 3.5 W

256