BURKERT 20033486 (Type 8652) is a 12-slot AirLINE valve island configured for process automation applications, combining high pneumatic density with multi-protocol Industrial Ethernet communications. This pre-assembled unit is fitted with ten bistable 5/2-way impulse solenoid valves (circuit function Z) across valve slots 1 through 10, accompanied by two blind plates at positions 11 and 12 for future expansion. The valve island incorporates three 8-channel digital input modules (24 DI total) to collect discrete sensor signals directly at the pneumatic manifold.

Designed specifically for installation on control cabinet floors or rear panels, the assembly integrates a stainless steel 1.4301 AirLINE Quick adapter plate with stainless steel pneumatic fittings. The process connections comprise D10 mm push-in air supply lines and D6 mm push-in working ports. Pneumatic safety mechanisms include integrated check valves in exhaust ports 3 (R) and 5 (S) to suppress pressure peaks, as well as a pneumatic HotSwap function at port 1 (P) that allows valve replacement during continuous system operation.

Pneumatic Configuration and Valve Functions

The 12-station manifold operates with an internal auxiliary pilot air supply across an operating pressure range of -1.0 bar to 10.0 bar (vacuum up to 10 bar) and a pilot pressure requirement of 3.0 bar to 10.0 bar. Each 11 mm wide valve station is serviced by a low-power pilot valve (Type 6164) actuating the Type 6534 pneumatic spool valve.

Positions 1 to 10 utilize circuit function Z (CF Z), which provides a 5/2-way bistable impulse function with two coils and integrated manual overrides. Pressure applied at port 1 directs output pressure alternately to port 2 or port 4. Once pulsed, the valve retains its switched position until the opposing coil is energized. Positions 11 and 12 are blanked off using dedicated dummy plates (article 335779).

Valve Position	Function Type	Circuit Function Symbol / Designation	Manual Override	Nominal Width
Position 1 to 10	5/2-way bistable impulse valve	Circuit function Z (CF Z), dual coil	Latching / spring return	4 mm
Position 11	Blind plate	Dummy plate module	—	—
Position 12	Blind plate	Dummy plate module	—	—

Standard Type 8652 valve stations deliver a nominal flow rate $Q_{\text{Nn}}$ of 310 l/min (measured with air at +20 °C, 6 bar inlet pressure, and 1 bar differential pressure). When utilizing the integrated pneumatic HotSwap function in supply port 1, the nominal flow rate is reduced by approximately 3% to 290–300 l/min.

Pilot Air Quality

Operate the valve island with dry, oil-free or lubricated compressed air complying with ISO 8573-1:2010 Class 7.4.4. Upstream filtration to 5 µm is recommended to ensure long operating life.

AirLINE Quick Stainless Steel Mounting System

The unit is equipped with the AirLINE Quick adapter system constructed from stainless steel 1.4301, complemented by working push-in couplings made of stainless steel 1.4401. This configuration allows direct mechanical mounting into a cutout on the bottom or wall of the control cabinet. Pneumatic supply and working lines connect on the outside of the enclosure, eliminating cabinet bulkhead fittings, reducing internal tubing clutter, and minimizing overall cabinet volume.

Feature	Specification
Adapter Plate Material	Stainless steel 1.4301
Pneumatic Fitting Material	Stainless steel 1.4401
Supply / Exhaust Ports	Push-in connector D10 mm (3/8")
Working Ports (2 and 4)	Push-in connector D6 mm (1/4")
Auxiliary Supply (Left)	Additional D6 mm and D10 mm push-in connectors
Enclosure Rating	IP65 when mounted in a closed control cabinet; NEMA 250 Type 4X

Digital Input Electronic Modules (24 DI)

BURKERT 20033486 incorporates three 8-channel digital input (8DI) electronic modules, providing 24 independent inputs for reading feedback signals from pneumatic actuators, process valves, or position sensors. Sensors are powered with 24 V DC directly from the electronic module, with current consumption limited to a maximum of 30 mA per digital input.

Parameter	Specification Value
Compatible Sensors	2-wire sensors (10–30 V), 3-wire sensors, mechanical limit switches
Switching Thresholds	$V_{\text{OFF}} = 0\dots5\text{ V DC}$, $V_{\text{ON}} = 10\dots30\text{ V DC}$
Input Current at $V_{\text{ON}}$	Max. 5.7 mA per channel (typical at 24 V DC)
Input Impedance	> 4 kΩ
Diagnostic Functions	Open-circuit detection (2-wire sensors), short-circuit detection (3-wire sensors)
Galvanic Isolation	No; all input channels share a common reference potential
Maximum Cable Length	< 30 m (conductor cross-section $\le 1.5\text{ mm}^2$)

Depending on the connected sensor technology, the digital input module reports diagnostic status directly on the integrated LC display and over the fieldbus:

Reported Sensor State	3-Wire Sensor	2-Wire Sensor	Mechanical Limit Switch
Sensor Actuated	Yes	Yes	Yes
Sensor Not Actuated	Yes	Yes	Yes
Short-Circuit Fault	Yes	—	—
Wire-Break Fault	—	Yes	—

ME43 Fieldbus Gateway and Industrial Ethernet Interface

Communications are managed through an integrated Type ME43 fieldbus gateway module supporting Industrial Ethernet protocols: PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, and CC-Link IE Field Basic, along with PROFINET S2 system redundancy for high-availability architectures. The physical interface consists of two shielded RJ45 ports (X1 and X2) enabling line or ring network topologies without requiring external industrial switches.

The illuminated LC display provides status indication, valve cycle counts, and diagnostic messages formatted in clear text and graphic symbols. Diagnostic messages are simultaneously transferred to the higher-level PLC. For engineering and configuration, the unit interfaces with the Bürkert Communicator software (Type 8920) via büS.

Pin	RJ45 Signal Assignment (X1 / X2)
1	TX+ (Transmit Data +)
2	TX- (Transmit Data -)
3	RX+ (Receive Data +)
4	N.C. (Not connected)
5	N.C. (Not connected)
6	RX- (Receive Data -)
7	N.C. (Not connected)
8	N.C. (Not connected)

Electrical Connections and Dual Power Supply

The island utilizes electrically segregated power feeds for the digital electronics and the pneumatic solenoid coils. Separate power routing protects communication networks from inductive switching transients and permits independent safety disconnection of valve coils.

Communication and Display Supply (5-Pin Spring Terminal)

Terminal	Wire Color	Assignment
1	Red	+24 V DC electronics power
2	White	CAN_H (büS connection)
3	Green	Shielding
4	Blue	CAN_L (büS connection)
5	Black	GND (0 V DC)

Pneumatic Valve Coil Supply (2-Pin Spring Terminal)

Terminal	Clip Number	Wire Color	Assignment
AUX 24 V	1	Red	+24 V DC auxiliary valve power
GND	2	Black	GND (0 V DC valve ground)

Electrical Limits

Conductor cross-sections up to 1.5 mm² are supported by both spring-loaded terminal blocks. Transient overvoltage suppression must be configured so that peak surges do not exceed 140% of the 24 V DC nominal supply voltage.

Dimensions and Control Cabinet Mounting

BURKERT 20033486 has a 12-slot width profile. Mechanical installation can be completed directly through cabinet base cutouts using AirLINE Quick or mounted onto standard DIN rails (EN 50022 35 × 7.5 mm or 35 × 15 mm).

Variant	Dimension A [mm]	Dimension B [mm]	Fixing Screws C	Pitch m	Pitch n
4-fold	66	—	4 × M5	3	1
8-fold	35	111	8 × M5	7	2
12-fold (20033486)	77	154	10 × M5	11	3

For reference across the Type 8652 family, larger manifold profiles include intermediate feed modules as detailed below:

Variant	A [mm]	B [mm]	Screws C	D [mm]	m	$m'$	n
16-fold with intermediate feed	112	224	10 × M5	114.3	7	7	4
20-fold with intermediate feed	134	268	10 × M5	158.3	11	7	5
24-fold with intermediate feed	156	312	10 × M5	158.3	11	11	6
16-fold without intermediate feed	99	198	10 × M5	—	15	—	4
20-fold without intermediate feed	121	242	10 × M5	—	19	—	5
24-fold without intermediate feed	143	286	10 × M5	—	23	—	6

Cabinet Installation Clearances

When positioning the valve terminal inside an enclosure, maintain minimum clearances between the terminal front edge and the cabinet door to permit hot swapping of solenoid valves.

General Technical Specifications

Category	Parameter	Specification Value
Materials	Housing Body	Polyamide (PA)
	Seals	NBR and PUR
	AirLINE Quick Base	Stainless steel 1.4301
	Push-in Connections	Stainless steel 1.4401 (working) / Stainless steel (supply)
Pneumatic Data	Operating Medium	Compressed air, neutral gases (ISO 8573-1:2010 Class 7.4.4)
	Operating Pressure	-1.0 bar to 10.0 bar (vacuum up to 10 bar)
	Auxiliary Pilot Pressure	3.0 bar to 10.0 bar (internal feed)
	Nominal Flow Rate $Q_{\text{Nn}}$	310 l/min (standard); reduced by ~3% with HotSwap
	Width per Station	11 mm
	Total Valve Slots	12 (expandable up to 24 slots / 48 functions in family)
Electrical Data	Operating Voltage	24 V DC (±10%), residual ripple 1 Vss
	Coil Power Consumption	0.7 W nominal (0.175 W after electronic power reduction)
	Coil Current Draw	29 mA nominal (10 mA after power reduction)
	Duty Cycle	Continuous operation (100% ED)
	Protection Class	Class III per DIN EN 61140 / VDE 0140
Environmental	Degree of Protection	IP20 standalone; IP65 in closed cabinet with AirLINE Quick
	Ambient Operating Temp.	-10 °C to +55 °C
	Storage Temperature	-20 °C to +60 °C
	Mounting Orientation	Unrestricted (any orientation)

Safety-Related Shut-off and Hazardous Area Compliance

Type 8652 supports safety-related shut-off architectures through optional SIA (safety shut-off) variants and module-based safety shutdown modules. In these configurations, external dry contacts directly interrupt the 24 V DC coil power circuit without requiring fieldbus interaction.

Hazardous Area Special Conditions

When installed in Zone 2 / Zone 22 hazardous locations (ATEX II 3G Ex ec IIC Gc, II 3D Ex tc IIIC Dc, IECEx BVS 20.0024 U, cURus Class I Div 2), the valve island must be installed in an enclosure rated at least IP54 for gas atmospheres or IP6X for dust atmospheres. Do not disconnect electrical terminals or perform HotSwap valve replacements while energized unless the atmosphere is verified to be non-hazardous.

Spare Parts and Ordering Numbers

Article No.	Component Description
20033486	Type 8652 valve island, 12-bank, 10x CF-Z, 2x blind, 24 DI, D10/D6 VA, Industrial Ethernet
301377	Type 6534 replacement valve, CF Z (5/2-way bistable impulse, 24 V DC, 290 l/min)
335779	Dummy plate module for unpopulated valve slots
384872	8DI electronic module with digital inputs (limit switch feedback)
384873	Electronic module without digital inputs
301799	ME43 fieldbus gateway module (PROFINET, EtherNet/IP, Modbus TCP, EtherCAT)
920180	5-pin spring-loaded terminal block (electronics / communication power)
920442	2-pin spring-loaded terminal block (AUX 24 V pneumatic coil power)
754961	Height adapter for 12-fold AirLINE Quick base plate
60005567	Retaining plate for 12-fold base plate (cabinet exterior mounting)
308661	M5 × 10 A2 DIN 6912 fastening screw set (pack of 10)