BURKERT 20012658 (Type 8652) is a 12-slot AirLINE Quick valve island configured for process automation applications. Each of the 12 valve positions is factory-equipped with a dual 3/2-way normally closed solenoid valve (Circuit Function C), providing 24 independently controllable pilot channels. The assembly incorporates an Industrial Ethernet communication gateway supporting PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, and CC-Link IE Field Basic via two RJ45 female connectors. Pneumatic connections are established through an anodised aluminium AirLINE Quick base plate, featuring brass D 3/8" supply connections and brass D 1/4" working ports, with an integrated internal auxiliary pilot air supply.

The system operates across a process pressure range from -1.0 bar to 10.0 bar (vacuum to 10 bar) and requires an internal pilot air pressure between 3 bar and 10 bar. It includes an integrated LC display that presents diagnostic messages and valve status in clear text and standardized symbols. When installed directly on a control cabinet floor or wall using the AirLINE Quick adapter plate, the pneumatic exhaust and working ports discharge through the cabinet cutout, sealing the interior to IP65 while maintaining an IP20 rating on the terminal body.

Technical Data and Operating Parameters

Parameter	Specification
Type / Article Number	Type 8652 / Article no. 20012658
Number of Valve Slots	12 slots (accommodates up to 24 valve functions)
Pre-installed Valve Slices	12x 2x 3/2-way CF-C (normally closed, servo-assisted)
Width per Valve Station	11 mm
Body / Seal Materials	PA (polyamide) / NBR and PUR
AirLINE Quick Plate Material	Anodised aluminium (working connections: nickel-plated brass)
Supply Port / Working Port Size	D 3/8" push-in / D 1/4" push-in (brass)
Auxiliary Pilot Air Supply	Internal supply (3 bar to 10 bar required)
Working Pressure Range	-1.0 bar to 10.0 bar (vacuum to 10 bar)
Nominal Flow Rate $Q_{\text{Nn}}$ (Air)	310 l/min (measured at +20 °C, 6 bar inlet, 1 bar $\Delta P$)
Operating Voltage	24 V DC ($\pm 10%$, residual ripple 1 Vss)
Power per Valve Slice	0.7 W nominal (0.175 W after electronic power reduction)
Current per Valve Slice	29 mA nominal (10 mA after power reduction)
Duty Cycle	100% continuous operation (ED)
Electrical Protection Class	Class III according to DIN EN 61140, VDE 0140
Operating Medium	Oil-free or lubricated compressed dry air, neutral gases (5 µm filtration recommended)
Compressed Air Quality	ISO 8573-1:2010, Class 7.4.4
Ambient & Medium Temperature	-10 °C to +55 °C (storage temperature: -20 °C to +60 °C)
Ingress Protection Rating	IP20 bare terminal; IP65 inside closed cabinet with AirLINE Quick
Explosion Protection (Optional)	ATEX: II 3G Ex ec IIC Gc / II 3D Ex tc IIIC Dc (BVS 20 ATEX E 031 U); IECEx BVS 20.0024 U

AirLINE Quick Adapter Plate and Cabinet Mounting

The AirLINE Quick adapter plate integrates the mechanical valve terminal base directly with the control cabinet floor or wall cutout. Tubing connects directly from the exterior baseplate, eliminating bulkhead fittings, internal tubing runs, and intermediate terminal strips inside the enclosure.

Key installation dimensions for the 4-, 8-, and 12-slot configurations are specified below:

Configuration	A (mm)	B (mm)	C (Fastening)	m	n
4-slot	66	—	4× M5	3	1
8-slot	35	111	8× M5	7	2
12-slot (20012658)	77	154	10× M5	11	3

Mechanical Clearances for Hot Swap

When installing the valve island inside a control cabinet, maintain the required front clearance to allow removal and insertion of individual valve slices under pressure. Review the control cabinet front-edge and rear-wall spacing rules documented in the Type 8652 operating instructions.

Circuit Functions and Valve Configurations

Article 20012658 is assembled with 12 valve slices of Circuit Function C (2x 3/2-way normally closed). The Type 8652 modular platform also accommodates alternative valve slice configurations using 11 mm Type 6534 pilot valves:

Circuit Function	Symbol Code	Description	Standard Flow Rate $Q_{\text{Nn}}$	Switching Time (Open / Close)
2x 3/2-way NC (Configured)	CF C	Dual 3/2-way solenoid valve, servo-assisted, normally closed	270 l/min	15 ms / 15 ms
Single 3/2-way NC	CF C	3/2-way solenoid valve, servo-assisted, normally closed	270 l/min	15 ms / 15 ms
2x 3/2-way NO	CF D	Dual 3/2-way solenoid valve, servo-assisted, normally open	310 l/min	15 ms / 15 ms
5/2-way monostable	CF H	5/2-way solenoid valve, servo-assisted	290 l/min	20 ms / 25 ms
5/2-way bistable	CF Z	5/2-way impulse solenoid valve, 2 coils	290 l/min	20 ms / 25 ms
5/3-way closed	CF L	5/3-way solenoid valve, middle position closed	275 l/min	15 ms / 15 ms
5/3-way ventilated	CF M	5/3-way solenoid valve, middle position ports 2 & 4 pressurized	300 l/min	20 ms / 20 ms
5/3-way exhausted	CF N	5/3-way solenoid valve, middle position ports 2 & 4 exhausted	300 l/min	20 ms / 20 ms

Electrical and Fieldbus Interface

Article 20012658 features separate power supplies for the electronic communication unit and the pneumatic valve coils, enabling external safety emergency disconnection without disrupting fieldbus communications.

Power Supply Terminal Assignments

• Communication and Display Power: 5-pin spring-loaded terminal (conductor cross-section $\le 1.5\text{ mm}^2$):
  • Red: +24 V DC
  • White: CAN_H (büS connection)
  • Green: Shielding
  • Blue: CAN_L (büS connection)
  • Black: 0 V DC (GND)
• Pneumatic Valve Coil Power: 2-pin spring-loaded terminal on interface plate:
  • Terminal 1 (Red): AUX +24 V DC
  • Terminal 2 (Black): 0 V DC (GND)

Industrial Ethernet Fieldbus Ports (X1 and X2)

The pre-installed ME43 gateway provides dual MDI/MDI-X 10/100 Mbps RJ45 ports (X1 and X2) supporting Industrial Ethernet protocols (PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, and CC-Link IE Field Basic):

Pin	Signal	Description
Pin 1	TX+	Transmit Data +
Pin 2	TX-	Transmit Data -
Pin 3	RX+	Receive Data +
Pin 4	N.C.	Not connected
Pin 5	N.C.	Not connected
Pin 6	RX-	Receive Data -
Pin 7	N.C.	Not connected
Pin 8	N.C.	Not connected

Network Topology Example

Type 8652 equipped with Industrial Ethernet acts as a primary master valve terminal, transmitting process data and diagnostics to local büS subnet valve terminals:

Gateway Configuration via Bürkert Communicator

Gateway modules Type ME43 are delivered without factory application profiles. Parameter files, protocol selections, and cyclic process data mappings must be generated and loaded using Bürkert Communicator Type 8920 in conjunction with the USB-büS interface set (Article no. 772426).

Hazardous Location and Safety Standards

Operating Rules in Potentially Explosive Atmospheres

For Type 8652 units operating in Zone 2 / 22 environments under ATEX certificate BVS 20 ATEX E 031 U (II 3G Ex ec IIC Gc / II 3D Ex tc IIIC Dc) or IECEx BVS 20.0024 U:

• Install the terminal within a tool-secured enclosure certified to at least IP54 (gas) or IP6X (dust) according to EN/IEC 60079-0, 60079-7, or 60079-31.
• Do not connect or disconnect electrical terminals (24 V DC power, fieldbus, or SIA contacts) while energized unless the atmosphere is verified as non-explosive.
• Hot Swap replacement of valve slices is strictly prohibited in explosive atmospheres unless an active gas-free work permit is established.
• Transient overvoltage protection must suppress voltage spikes exceeding 140% of the nominal peak supply voltage.

Spare Parts and AirLINE Quick Ordering Information

Replacement Solenoid Valves Type 6534

Valve Model / Function	Pressure Range	Flow Rate $Q_{\text{Nn}}$	Voltage	Article No. (incl. screws)
2x 3/2-way CF-C (Standard)	Vac. to 10 bar	270 l/min	24 V DC	301374
2x 3/2-way CF-C (SIA variant)	Vac. to 10 bar	270 l/min	24 V DC	338802
2x 3/2-way CF-D (Standard)	Vac. to 10 bar	310 l/min	24 V DC	301375
5/2-way CF-H (Standard)	Vac. to 10 bar	290 l/min	24 V DC	301376
5/3-way CF-L (Standard)	Vac. to 10 bar	275 l/min	24 V DC	301380
Dummy / Blanking Plate Valve	—	—	—	335779

AirLINE Quick 12-Slot Accessories

Accessory Description	Quantity	Article No.
Screw set M5×10 A2 DIN 6912 (fastening island to cabinet base)	10 pcs	308661
Height adapter plate for 12-slot base (without intermediate feed)	1 pc	754961
External retaining plate for 12-slot base (cabinet exterior)	1 pc	60005567
Blind cover plate for 12-slot base cutout	1 pc	754966
5-pin spring-loaded terminal (electronics & display power)	1 pc	920180
2-pin spring-loaded terminal (valve coil power)	1 pc	920442