BURKERT 20122496 (Type 8652) is an AirLINE pneumatic valve island engineered for process automation environments. Configured with 16 valve slots, each slot is equipped with a Type 6534 dual 3/2-way normally closed solenoid valve (Circuit Function C), providing 32 independently controllable pilot valve functions in an 11 mm slice format. The valve island communicates over Industrial Ethernet protocols (PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, and CC-Link IE Field Basic) through dual RJ45 connectors, eliminating proprietary fieldbus dependency. Direct cabinet wall or floor mounting is established via an integrated AirLINE Quick adapter plate fabricated from anodised aluminium, providing IP65 protection within an enclosed cabinet enclosure.

Pneumatic connections are realised through brass push-in fittings, with D10 mm primary supply lines and D6 mm working lines routed directly through the baseplate adapter. The pilot stage operates using internal auxiliary pilot air supplied at 3 to 10 bar, enabling system vacuum to 10 bar operating pressure across media temperatures from -10 °C to +55 °C. Solenoid actuation requires a 24 V DC power feed, utilizing electrical power reduction after switching (0.7 W inrush dropping to 0.175 W holding power) to limit thermal generation within dense control enclosures.

Technical Data and Configuration

Feature	Specification
Article number	20122496
Valve island series	Type 8652 AirLINE
Number of valve slots	16 PCE
Valve module configuration	16x 2x 3/2-way CF-C (servo-assisted, normally closed)
Width per station	11 mm
Manual override	Latching, spring return
Communication module	ME43 fieldbus module
Industrial Ethernet protocols	PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, CC-Link IE Field Basic
Ethernet physical ports	2x RJ45 (ports X1 and X2)
Primary supply connection (1)	Push-in connector D10 mm, Brass
Working ports (2, 4)	Push-in connector D6 mm, Brass
Additional supply ports	Push-in D6 mm and D10 mm (left and right feed blocks)
Intermediate feed module	Without intermediate feed (0 PCE)
Operating pressure range	-1.00 bar to 10.00 bar (vacuum to 10 bar)
Auxiliary pilot air pressure	3.00 bar to 10.00 bar (internal feed)
Nominal flow rate QNn (air)	270 l/min per 3/2-way valve (at +20 °C, 6 bar inlet, 1 bar pressure drop)
Valve switching times	Opening: 15 ms, Closing: 15 ms (ISO 12238)
Operating voltage	24 V DC (±10 %, residual ripple 1 Vss)
Valve nominal power	0.7 W nominal, 0.175 W after holding power reduction
Valve nominal current	29 mA nominal, 10 mA after power reduction
Display variant	Basic (without LC display)
Digital inputs	0 (electronic DI module not fitted)
Check valves in exhaust 3 (R) / 5 (S)	No
Pneumatic HotSwap in port 1 (P)	No
Ingress protection	IP20 (bare unit), IP65 (cabinet bottom mounting with AirLINE Quick)
Permissible medium/ambient temperature	-10 °C to +55 °C
Storage temperature	-20 °C to +60 °C
Operating fluid	Lubricated or unlubricated dry air, neutral gases (ISO 8573-1:2010 Class 7.4.4)

AirLINE Quick Mechanical Integration

Direct floor or wall cabinet penetration is handled by the AirLINE Quick interface. By integrating pneumatic push-in bulkheads into an anodised aluminium adapter plate, working lines (D6 mm) and main supply lines (D10 mm) exit directly out of the control cabinet without intermediate bulkheads or terminal strips.

AirLINE Quick Cabinet Floor Mounting

Installing the AirLINE Quick adapter plate directly into the cabinet floor cutout provides an IP65 perimeter seal and reduces panel footprint. Piping connections remain accessible from the cabinet exterior, which accelerates tubing installation and simplifies field maintenance.

Pneumatic Circuit Functions and Valve Modules

Article 20122496 is factory-populated with 16 identical Type 6534 solenoid valve slices in Circuit Function C. Each 11 mm station contains two independently controlled 3/2-way normally closed valves with integrated manual overrides. Air flow rate QNn reaches 270 l/min per pilot valve, measured with 6 bar inlet pressure and a 1 bar differential.

Replacement valve modules for this configuration correspond to Burkert Article no. 301374 (spare part reference REF 296031), which includes the solenoid slice, mounting screws, and interface seals.

Electrical and Industrial Ethernet Connections

The fieldbus architecture is powered by the integrated ME43 communication gateway supporting multi-protocol Industrial Ethernet. Network cabling connects to two switched RJ45 sockets (X1 and X2), enabling line and ring topologies.

RJ45 Pin	Signal Assignment
1	TX+ (Transmit data +)
2	TX- (Transmit data -)
3	RX+ (Receive data +)
4	Not connected (N.C.)
5	Not connected (N.C.)
6	RX- (Receive data -)
7	Not connected (N.C.)
8	Not connected (N.C.)

Power supply connections are divided into two isolated circuits:

1. Logic and Communication Supply (5-Pin Spring Terminal): Powers the fieldbus gateway and internal electronics. Cable cross-sections up to 1.5 mm² are supported. Pin 1: Red (+24 V DC), Pin 2: White (CAN_H / büS), Pin 3: Green (Shield), Pin 4: Blue (CAN_L / büS), Pin 5: Black (GND / 0 V DC).
2. Valve Actuation Power Supply (2-Pin Spring Terminal): Powers pneumatic valve coils via an AUX 24 V line. Pin 1: Red (AUX +24 V DC), Pin 2: Black (GND / 0 V DC).

Independent Coil Supply Circuit

Separating the logic power from the valve actuator supply permits external safety interlocks to interrupt coil power without dropping fieldbus communication or PLC node diagnostic availability.

Dimensions and Installation Clearances

For a 16-valve configuration without intermediate supply modules, the dimensional envelope is defined below (all values in mm):

Variant	A	B	C	D	m	m'	n
16-fold without intermediate feed	99 mm	198 mm	10x M5	—	15	—	4
16-fold with intermediate feed (ref.)	112 mm	224 mm	10x M5	114.3 mm	7	7	4

During cabinet layout, adequate clearance between the front face of the valve island and the cabinet door/mounting plane must be maintained to facilitate manual override operation and wiring service access.

Hazardous Area Conditions and Compliance

When ordered with explosion-proof options PU17 or PX68, Type 8652 complies with ATEX and IECEx standards for Zone 2 (Gas) and Zone 22 (Dust):

• ATEX: BVS 20 ATEX E 031 U, II 3G Ex ec IIC Gc / II 3D Ex tc IIIC Dc
• IECEx: IECEx BVS 20.0024 U, Ex ec IIC Gc / Ex tc IIIC Dc
• North America (cURus HazLoc): Class I, Zone 2, AEx ec IIC Gc / Class II, Zone 22, AEx tc IIIC Dc; Class I, Division 2, Groups A, B, C, D; Class II/III, Division 2, Groups F, G
• China CCC: GB/T 3836 explosive atmospheres compliance

Hazardous Location Wiring Requirements

In hazardous atmospheres, terminal plugs (including 24 V power, SIA, and bus connections) must never be connected or disconnected while energised. Enclosures must provide an ingress protection rating of at least IP54 for gas (3G/Gc) and IP6X for dust (3D/Dc). External transient overvoltage protection must limit voltage surges to 140% of peak rated voltage.

Accessories and Replacement Components

Item Description	Article Number
Replacement solenoid valve Type 6534 (2x 3/2-way CF-C, 24 V DC, incl. screws)	301374
5-pin spring-loaded terminal plug (communication & display power supply)	920180
2-pin spring-loaded terminal plug (pneumatic valve AUX power supply)	920442
Fastening screw set M5 x 10 A2 DIN 6912 (10 pieces for cabinet baseplate mounting)	308661
Height adapter for 16-fold baseplate without intermediate feed	60041928
Retaining plate for 16-fold baseplate without intermediate feed (cabinet exterior)	60005880
Blind plate for 16-fold baseplate without intermediate feed	60041929
Bürkert Communicator configuration software	Type 8920
USB büS interface set 1 (Type 8923 programming kit with cables & terminating resistor)	772426