8685 BURKERT | Alldatasheet
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Technical content
Visit product website DATA SHEET Type 2036 Robolux multiway multiport diaphragm valve, pneumatically operated Standard | EU | en | 2023 - 11 - 07 | 04 Control- and feedback head for integrated mounting on Robolux valves Type 2036
- Compact design Contactless valve position registration Coloured illuminated status display Fieldbus AS-Interface (optional) With ATEX II cat. 2G approval Feedback Type 8685 and control head Type 8686 are optimized for integrated mounting on pneumatically operated actuators Type 2036 Robolux. The adjust ment to the individual actuator size is done through DIP-switches. As compact units the devices contain the complete automation functionality of both individually operated actuator pistons. Depending on the configuration, electrical and visual position feedback is done by non-contact switches and LEDs, integrated pilot valves control the actuator pistons and AS-interface communica- tion is available. In this way a complete concept for decentralized automation is feasible. The compact body is especially distinguished by its hygienic design, materials being chemically resistant against cleaning media and a proven IP protection. In addition the Control Head Type 8686 features an integrated compressed air filter to protect the pilot valve function against particles through the compressed air supply. Product variants described in the data sheet may differ from the product presentation and description. Type description Can be combined with Type 8685/8686 © Christian Bürkert GmbH & Co. KG, Subject to alteration
2 | 15Visit product website Table of contents 1. General technical data 3 1.2. Without fi eldbus communication: 24 V DC 1.3. With fi eldbus communication: AS-Interface Type 8685 1.4. With fi eldbus communication: AS-Interface Type 8686 1.5. Ex i version Type 8685 and Type 8686 2. Approvals and conformities 5 2.2. Conformity 2.3. Standards 3. Materials 6 Type 8685 Type 8686 Type
8686 Ex i (NAMUR)
- Dimensions 7 4.2. Type 8686 4.3. Type
- Device/Process connections 10 Without fi eldbus communication 24 V DC: Type 8685 Without fi eldbus communication 24 V DC: Type 8686 AS-Interface connection: Type 8685 and Type 8686 6. Product installation 13 7. Ordering information 14 7.2. Bürkert product fi lter 7.3. Ordering chart 7.4. Ordering chart accessories Standard accessories Adapter kits
3 | 15Visit product website 1. General technical data 1.1. Control and feedback head Type 8685 and Type 8686 Product properties Dimensions Further information can be found in chapter “4. Dimensions” on page 7 Material Body PPS, stainless steel Seal EPDM Cover PC Communication Fieldbus AS-Interface Performance data Position sensor Stroke range for linear actuator Valve spindle RV50 6.0 mm, RV70 9.5 mm, RV110 13.5 mm Position feedback Reed sensors (contactless) Electrical data Operating voltage Pilot valve 24 V DC ± Maximum input voltage 1.) For Ex i variant: see “1.5. Ex i version Type 8685 and Type 8686” on page 5 Residual ripple 10 Power consumption 0.8 W every valve Limit switches 24 V DC ± 8.2 V DC (Ex i-NAMUR switch ampli fi er) Ui < V, Ii < mA, Pi < mW (Ex barrier) Protection class III according to VDE 0580 Electrical connection Multipole version M12 (8-pin), M12 (4-pin) with 1 m cable (AS-Interface) Cable gland version M16 1.5 (cable Ø 6.5 mm), screw terminals (1.0 mm2) Pneumatic data Control medium Neutral gases, air, quality class according to ISO 8573 Dust content Class 5 (< µm particle size) Particle density Class 5 (< mg/m3) Pressure dew point Class 3 (<- °C) Oil content Class 5 (< mg/m3) Air supply filter Exchangeable Mesh size ~0.1 mm Supply pressure 3…7 bar 2.) Pilot air ports Threaded connection G ⅛ Approvals and conformities Further information can be found in chapter “2. Approvals and conformities” on page 5 Environment and installation Operating conditions Ambient temperature 0…+ Degree of protection IP65/67 according to EN 60529 Installation and mechanical data Installation position As required, preferably with actuator in upright position Adapter kits Further information can be found in chapter “Adapter kits” on page 15 1.) Valve supply: Maximum input power Pi = 1.1 mW Maximum input voltage and maximum input current according to the following table Ui [V] 15 18 20 22 25 28 30 35 Ii [mA] 900 440 309 224 158 120 101 73 Internal capacity and inductance negligible 2.) The existing supply pressure must be 0.5…1 bar above the minimum required pilot pressure of the valve actuator.
4 | 15Visit product website 1.2. Without fieldbus communication: 24 V DC Electrical data Operating voltage 24 V DC Residual ripple 10 Power consumption < W Voltage tolerance ± Output Max. 100 mA per output, short-circuit protected Electrical connection Multipole M12 (8-pin) Cable gland M12 1.5 (cable Ø 6.5 mm), screw terminals (1.0 mm2 / maximum port cross-section 0.25 mm2) 1.3. With fieldbus communication: AS-Interface Type 8685 Product properties Pro fi le S-0.A.E (AB slave, max. 62 slaves/master) Electrical data Operating voltage 29.5…31.6 V DC Via bus cable According to speci fi cation Separated from bus signal On request Maximum current consumption (2 terminal position reached) mA Electrical connection M12, 4-pin with 1 m cable on flat cable clip Programming data See operating manual Type 8685 1.4. With fieldbus communication: AS-Interface Type 8686 Product properties Pro fi le S- 7.A.E (AB slave, max. 62 slaves/master) Electrical data Operating voltage 29.5…31.6 V DC Via bus cable According to speci fi cation Separated from bus signal On request Maximum current consumption (2 valves activated and 2 position feedback active) 120 mA Outputs Contact rating ≤ 0.8 W (above AS-Interface) Watchdog function Integrated Inputs Sensor operating voltage 24 V ± % (above AS-Interface) Current carrying capacity ≤ mA short circuit protected Switching level High ≥ V Input current High ≤ 1.5 mA Input current Low ≤ 0.1 mA Electrical connection M12, 4-pin with 1 m cable on flat cable clip Programming data See operating manual Type 8686
5 | 15Visit product website 1.5. Ex i version Type 8685 and Type 8686 Electrical data Operating voltage Limit switches Operates with Ex i-NAMUR switch ampli fi er: 8.2 V DC Operates with Ex barrier 1.): Max. input voltage Ui < 12 V DC Pilot valve Control valve component for Ex valve coils 2.) Limit switches status Only electrical feedback Current consumption Operates with Ex-i-NAMUR switch ampli fi er: 1.2 mA (terminal position reached) 2.1 mA (terminal position not reached) Operates with Ex barrier 1.): Maximum input current Ii < 50 mA Electrical connection Cable gland M12 1.5 (cable Ø 6.5 mm, screw terminals 1.0 mm2/max. port cross-section: 8685: 0.25 mm2, 8686: 0.14 mm2 Approvals and conformities Explosion protection Ignition protection class BVS 13 ATEX E 039 X IIG Ex ia IIC T4 Gb IECEx BVS 13.0047 X Ex ia IIC T4 Gb Further information can be found in chapter “2. Approvals and conformities” on page 5 Environment and installation Operating conditions Medium temperature of adapted process valve Type 2036 T (Medium): 0…130 °C (safety requirement value) 1.) Electrical feed-in through intrinsically safe electric circuit of ignition protection Ex ia IIC. Each circuit (end position) has the following safety related max data: Maximum input voltage Ui V DC / Maximum input current Ii mA Maximum input power Pi mW Internal capacity and inductance negligible 2.) Valve supply: Maximum input power Pi = 1.1 mW Maximum input voltage and maximum input current according to the following table Ui [V] 15 18 20 22 25 28 30 35 Ii [mA] 900 440 309 224 158 120 101 73 Internal capacity and inductance negligible 2. Approvals and conformities 2.1. General notes
- The approvals and conformities listed below must be stated when making enquiries. This is the only way to ensure that the pro duct complies with all required speci fi cations. Not all available versions can be supplied with the below mentioned approvals or conformities. 2.2. Conformity In accordance with the Declaration of Conformity, the product is compliant with the EU Directives. 2.3. Standards The applied standards which are used to demonstrate compliance with the EU Directives are listed in the EU-Type Examination Certificate and/or the EU Declaration of Conformity.
6 | 15Visit product website 3. Materials 3.1. Material specifications Type 8685 No. Element Material
1 Cover PC
2 Seal EPDM
3 Basic housing PPS
4 Screws Stainless steel
5 Cable gland PA
No. Element Material
2 Outer casing EPDM
3 Screws Stainless steel
4 Threaded ports G
⅛ Stainless steel
5 Basic housing PPS
6 Seal EPDM
7 Plug connector M12 Nickel-plated brass
8 Dummy plug PA
No. Element Material ⅛ Stainless steel
7 Cable connection PA
7 | 15Visit product website 4. Dimensions 4.1. Type 8685 Note: Dimensions in mm Ø 90.8 86.2 14.1 17.1 6 Ø 7.3 40° 55.8 64.5
8 | 15Visit product website 4.2. Type 8686 Note: Dimensions in mm 115.4 Ø 90.8 14.1 17.1 613.5 31.7 14.6 14.6 40° 55.5 50.3 54.1 43.5 Ø 118
9 | 15Visit product website 4.3. Type 8686 Ex i (NAMUR) Note: Dimensions in mm 14.4 13.5 31.7 ~Ø 90.8 115.4 14.1 17.1 64.5 40° 43.5 38 54.1 50.3 Ø 118 14.6
10 | 15Visit product website 5. Device/Process connections 5.1. Electrical connections Without fieldbus communication 24 V DC: Type 8685 Cable gland Top1 Top2 Bot1 Bot2
24 V GND
Description on circuit board Description V Operating voltage + (24 V DC) GND Operating voltage – (GND) Top 1 End positions above, Top actuator 1 Bot 1 End positions below, Bot actuator 1 Top 2 End positions above, Top actuator 2 Bot 2 End positions below, Bot actuator 2 Ex i (NAMUR): cable gland Bot1 + Top1 -Bot1 - Top1 + Top2 + Top2 - Bot2 + Bot2 - Description on circuit board Description Top 1 + End positions above + actuator 1 Top 1 – End positions above – actuator 1 Bot 1 + End positions below + actuator 1 Bot 1 – End positions below – actuator 1 Top 2 + End positions above + actuator 2 Top 2 – End positions above – actuator 2 Bot 2 + End positions below + actuator 2 Bot 2 – End positions below – actuator 2
11 | 15Visit product website Without fieldbus communication 24 V DC: Type 8686 Cable gland 24 V GND Valve1 Valve2 Top1 Bot1 Top2 Bot2 Description on circuit board
Description
Bot 2 End positions below, Bot actuator 2 Top 2 End positions above, Top actuator 2 Bot 1 End positions below, Bot actuator 1 Top 1 End positions above, Top actuator 1 Valve 2 Valve control Y2 + (actuator 2 operated) Valve 1 Valve control Y1 + (actuator 1 operated) GND Operating voltage – V DC Operating voltage + Multipole connection M12, 8-pin Note: Use only straight cable sockets. Pin Description Assignment
1 Limit switches 3 End positions below, Bot actuator 2
2 Limit switches 4 End positions above, Top actuator 2
3 Limit switches 1 End positions below, Bot actuator 1
4 Limit switches 2 End positions above, Top actuator 1
5 Valve 2 Valve control Y2 +
6 Valve 1 Valve control Y1 +
7 GND Operating voltage –
V DC Operating voltage + Ex i (NAMUR): cable gland TOP1- TOP 1+ BTM2- BTM2+ BTM1- BTM1+ TOP2- TOP2+ RV 110 70 50 RV 50 70 110 Actuator Actuator Y1-Y1+ Y2-Y2+ Description on circuit board Description TOP 1 + End positions above + actuator 1 TOP 1 – End positions above – actuator 1 BTM 1 + End positions below + actuator 1 BTM 1 – End positions below – actuator 1 TOP 2 + End positions above + actuator 2 TOP 2 – End positions above – actuator 2 BTM 2 + End positions below + actuator 2 BTM 2 – End positions below – actuator 2 Y1 + Supply line valve1 Y1 – Return circuit valve1 Y2 + Supply line valve2 Y2 – Return circuit valve2
12 | 15Visit product website AS-Interface connection: Type 8685 and Type 8686 Circular plug M12, 4-pin Pin Description Control head Type 8686 Feedback head Type 8685
1 Bus +
3 Bus –
13 | 15Visit product website 6. Product installation 6.1. Combination options with pneumatic process valves ELEMENT Note: A complete process valve system Type 8806 consists of control head Type 8686 or position feedback Type 8685, a control valve Type 2036 Robolux and an adapter set. The following information is required to select a complete system: Article no. of the desired positioner control head Type 8686 or feedback Type 8685 Article no. of the desired control valve Type
2036 Robolux
You order two components and receive a completely assembled and tested valve. Examples of control valve systems Feedback head Control head Desired process valve Type 8685 Type 8685 Ex Type 8686 Type 8686 Ex Type 2036 Robolux Complete process valve system Process valve system with position feedback On/Off Robolux Type 8806-DI-S 2036 8685 Process valve system with position feedback On/Off Robolux Type 8806-DI-T 2036 8686
14 | 15Visit product website 7. Ordering information 7.1. Bürkert eShop Bürkert eShop – Easy ordering and quick delivery You want to fi nd your desired Bürkert product or spare part quickly and order directly? Our online shop is available for you 24/7. Sign up and enjoy all the bene fi ts. Order online now 7.2. Bürkert product filter Bürkert product filter – Get quickly to the right product You want to select products comfortably based on your technical requirements? Use the Bürkert product fi lter and fi nd suitable articles for your application quickly and easily. Try out our product filter 7.3. Ordering chart Type Communication Electrical connection Pneumatic function Position feed- back Pilot air ports Article no.
8685 Without Cable gland Without 2 switching points Threaded connection G
⅛ 231306 AS-Interface A/B Cable gland with 1 m cable on flat cable clip Without 2 switching points Threaded connection G ⅛ 231307 Ex i (NAMUR) Cable gland Without 2 switching points Threaded connection G ⅛ 242249
8686 Without M12 (8-pin) 2x single-acting
3.0 2 switching points Threaded connection G ⅛ 231292 AS-Interface A/B Cable gland with 1 m cable on flat cable clip 2x single-acting DN 3.0 2 switching points Threaded connection G ⅛ 231293 Ex i (NAMUR) Cable gland 2x single-acting DN 3.0 2 switching points Threaded connection G ⅛ 242250 Further versions on request Additional Type
8686 ASI - variants with external power supply
V DC - variants with cable gland
15 | 15Visit product website 7.4. Ordering chart accessories Standard accessories Note: Must be ordered separately. Description Article no. M12 circular socket with cable, 8-pin, cable length: 5 m, for input and output signals 919267 M12 circular socket with cable, 8-pin, cable length: 2 m, for input and output signals 919061 AS-Interface flat cable clamp, M12 outlet, stainless steel outlet 799646 Silencer G ⅛ 780779 Pilot tool for cover mounting 674077 Adapter kits Note: Must be ordered separately. Description Actuator size Article no. Adapter set for Type