897 /Feedback Type 897 can be combined with... Compact design Integrated pilot valve with manual override Internal control air routing Bright LED position indicator Automatic end position adjustment Type 00 Angle seat valve Type 0 Globe seat valve Type 0 Diaphragm valve Type 000 Angle seat valve The 897 pneumatic control unit is optimised for integrated mounting on the ELEMENT XX process valve and CLASSIC 0xx series. Mechanical or inductive limit switches register the position of the valve. The integrated pilot valve controls single-acting actuators. The design of the control unit and the actuator enables an internal control air routing without external tubings. Besides the electrical position feedback signal the status of the device is shown directly on the control head itself via LEDs. The housing is easy to clean and features proven electrical IP protection and chemically resistant materials for use in hygienic processing, in food, beverage and pharmaceutical industries. Combined with Bürkert ELEMENT actuators the unique pilot valve system enables a compressed air recycling that avoids actuator chambers contamination from the environment. * Supply voltage according to UL NEC Class for versions with culus approval. ) The supply pressure has to be 0. - bar above the minimum required pilot pressure for the valve actuator. Technical Data Material - Body Cover Sealing Operating voltage * Pilot valve Micro switch Initiator Control medium Dust concentration Particle density Pressure condensation point PPS PC EPDM V DC ±0% - residual ripple 0%, consumption W V Version: 0 8 V AC/DC, max. A 0V Version: 0 0 V AC/DC, max. A 0 to 0 V DC - max.00 ma per initiator neutral gases, air quality class DIN ISO 87- Class : max. particle size 0 μm Class : max. particle density 0 mg/m³ Class : max. -0 C or min. 0 C below the lowest operating temperature Class : max. mg/m³ Oil concentration Supply pressure to 7 bar ) Pilot air ports Threaded ports G /8 or push-in connector (tube Ø mm / / ) Position feedback x micro switch (0 8 V AC/DC, max. A) x micro switch (0 0 V AC/DC, max. A) x initiator ( V DC), PNP shutter -wire x initiator NAMUR (8, V DC) (-wire) x initiator ( V DC), Schließer (-wire) Stroke range valve spindle Ambient temperature with/without pilot valve with/without pilot valve with pilot valve without pilot valve to mm 0 to +ºC (II D Ex tc IIIC TºC Dc, II G Ex na IIC T Gc) 0 to +ºC (II D Ex ia IIIC T C Db IP, II G Ex ia IIC T Gb) -0 to +ºC (II G Ex ia IIC T Gb) -0 to +0ºC (II G Ex ia IIC T Gb) as required, preferably with actuator in upright position IP and IP7 according to EN 09, Type X Installation Protection category Protection class according to VDE 080 Conformity according to CE in compliance with EMV 00/08/EG Ignition protection II D Ex tc IIIC TºC Dc II G Ex na IIC T Gc II D Ex ia IIIC TºC Db IP II G Ex ia IIC T Gb Approval Electrical connection Multipole culus certifi cate no. E879 M, 8-pole Mx. SW (cable 0. bis. mm² -8 mm), terminal screws p. /8
897 Ordering information for process valve system with integrated pneumatic control unit A complete process valve system consists of a pneumatic control unit Type 897 and a process valve Type ELEMENT xx or CLASSIC 0xx. The following information is necessary for the selection of a complete system: Item no. of the desired pneumatic control unit Type 897 (see Ordering chart) Item no. of the selected process valve Type xx or Type 0xx If you order two components, you receive a complete assembled and certified valve. When you click on the orange box "More info." below, you will come to our website for the resp. product where you can download the datasheet. Example for process valve systems Unit Type 897 Desired process valve, example 00 Angle-seat valve 0 Diaphragm valve 000 Angle-seat valve Complete process valve system Process valve system On/Off ELEMENT Type 880-YE-U 00+897 Process valve system On/Off ELEMENT Type 880-DF-U 0+897 Process valve system On/Off Classic Type 880-YA-U 000+897 p. /8
Ordering chart (other versions on request) End position feedback 897 Item no. Inductive Switch -wire PNP Inductive Switch -wire NAMUR Inductive Switch -wire V DC Micro Switch V DC Micro Switch 0-0V AC/DC Electrical connection ATEX / IECEx Cat. D/G Zone / ) ATEX / IECEx Cat. D/G Zone / ) ATEX/ IECEX Cat. G Zone ) culus Pilot air ports threaded ports Actuator series ELEMENT Type xx Actuator series CLASSIC Types 0xx Unit (pilot valve /-way, single acting NO/NC) yes G/8 8 8 na yes G/8 / M na 8 89 yes G/8 87 na yes G/8 / M na 8 yes G/8 89 na yes G/8 / M na 8 M connector yes G/8 8 88 na yes G/8 / M na 8 80 yes G/8 8 8 na yes G/8 / M na 8 8 yes G/8 8 na yes G/8 / M na 8 yes G/8 8 8 na yes G/8 / M na 8 88 yes G/8 8 na yes G/8 / M na 8 M Multipole yes G/8 0 78 na Without end position feedback yes G/8 0 79 na yes G/8 0 80 na Feedback (without pilot valve) yes G/8 8 8 na yes without na 8 87 yes G/8 8 na yes without na 8 yes G/8 87 na yes without na 88 M connector yes G/8 0 7 na yes without na 0 7 yes G/8 8 80 na yes without na 8 8 yes G/8 80 na yes without na 8 yes G/8 8 80 na yes without na 8 8 yes G/8 8 na yes without na 80 yes G/8 8 8 na yes without na 8 8 yes G/8 8 808 na yes without na 8 8 Note: culus only valid for versions without ATEX approval ) II D Ex tc IIIC T / II G Ex na IIC T Gc ) II D Ex ia IIIC T C Db IP / II G Ex ia IIC T Gb ) II G Ex ia IIC T Gb Approvals FM Additional Feedback switchpoint NPN-coded Push-in pilot air ports (tube Ø mm; / ) p. /8
Ordering chart adapter kit (has to be ordered separately) 897 Description Actuator size Control function Item no. Adapter kit ELEMENT Types xx Adapter kit CLASSIC Types 0xx Unit / Feedback Ø0mm single acting / universal 8 9 Unit Ø0mm single acting 98 7 Unit Ø0mm Seat valve types 000 / 0 single acting 8 Unit Ø0mm Diaphragm valve types 00 / 0 single acting 8 8 Unit Ømm ) single acting 8 Feedback Ø0mm universal 98 7 Feedback Ø0//80mm universal 8 Feedback Ø00/mm universal 8 Feedback Ø7/mm universal 8 9 For installation kits to rd party process valves please see datasheet "Installation Kits for hygienic process valves" or contact your sales office for related drawings or individual engineering support ) When combining actuator size Ø mm with 897 CLASSIC reduced switching dynamics should be expected. Please choose Type 890 for shorter response times. Ordering chart accessories Description Item no. M socket, 8-pins, m assembled cable 99 0 M socket, 8-pins, m assembled cable 99 7 Silencer G/8 780 779 Silencer, push-in connector 90 Stroke limitation actuator CLASSIC Ø0/mm 89 Stroke limitation actuator CLASSIC Ø80mm 89 Stroke limitation actuator CLASSIC Ø00/mm 89 Materials Transparent cap PC Basic body PPS Sealing EPDM Plug M PA Brass nickel plated Screws Stainless steel Push-in connector Threaded ports G/8 POM / stainless steel stainless steel p. /8
Dimensions [mm] for mounting on process valve ELEMENT Types xx 897, 7,7,7,7 0, 9 9 0,,, p. /8
Dimensions [mm] Control Unit for mounting on process valve CLASSIC Types 0xx 897 Ø. 7.7.7.... 0.9 89.9 0. 8. 8. 9 9 0..7 7. Feedback for mounting on process valve CLASSIC Types 0xx 0.. p. /8
Connection options Multipole, plug M 8-pins 897 8 7 Plug configuration with -wire inductive switch, V DC Pin no. Wire Configuration External circuit colour ) white INI Bottom OUT Output Output ( V) brown INI Top OUT Output Output ( V) green INI - () Supply yellow INI + ( V DC) Supply + V DC grey 0/ V 0/ V DC ±0% pink Residual ripple 0% ) The indicated colours refer to the connecting cable available as an accessory (99 0), M x. (cable-ø 0 mm), terminal screws (. mm ) Port configuration with micro switch, V DC / 0 V AC/DC Terminal Configuration External circuit Screw terminals Terminal No Micro switch top Micro switch bottom NO NC Joint connection NO NC Joint connection Port configuration with -wire inductive switch, V DC Terminal Configuration INI + ( V DC) Supply INI Supply INI Top OUT Output INI Bottom OUT Output 0/ V DC External circuit + V DC Output Output 0/ V DC ±0% Residual ripple 0% p. 7/8
Port configuration with -wire inductive proximity switches 897 Screw terminals -wire inductive proximity switches (NAMUR) Terminal Configuration External circuit INI Top + Explosion Non-hazardous protected area area 7) Terminal No INI Top - INI Bottom + INI Bottom - + / / NAMUR- Sensor R +8, V DC 0 V 8) -wire inductive proximity switches, V Terminal Configuration External circuit INI Top + INI Top - INI Bottom + / / load + INI Bottom - + 7) (Acc. to NAMUR recommendation). Please note the prototype test certifi cate from Turck KEMA 0 ATEX 090X 8) Barrier signal, see PTB 07 ATEX 08 To find your nearest Bürkert facility, click on the orange box In case of special application conditions, please consult for advice. Subject to alteration. Christian Bürkert GmbH & Co. KG 0/_EU-en_0089 p. 8/8