BURKERT 20074352 (Type 8652) AirLINE is a 4-bank pneumatic valve island engineered for process automation environments, featuring an integrated stainless steel AirLINE Quick adapter plate and Industrial Ethernet communication. The assembly accommodates 4 valve slots fitted with four 2x 3/2-way normally closed (circuit function C) pilot-operated valves, providing 8 independently controlled pneumatic outputs within an 11 mm station width format. Operating over a pressure range from -1.0 to 10.0 bar with internal pilot feed at 3 to 10 bar, the unit provides a nominal airflow rate of 310 l/min.

Equipped with dual RJ45 ports supporting multiprotocol Industrial Ethernet (PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, and CC-Link IE Field Basic), the valve terminal integrates an 8-point digital input module directly on the sub-base. It incorporates process security features including integrated check valves in the exhaust channels 3 (R) and 5 (S) to suppress pressure peaks, as well as a pneumatic HotSwap mechanism in pressure supply port 1 (P) that allows replacing individual valves during live operation.

Technical Data

Specification Parameter	Technical Value
Model Order Number	20074352
Base Type Family	8652 AirLINE
Number of Valve Slots	4 stations (expandable series architecture up to 24 slots)
Pre-installed Valve Configuration	4x 2x 3/2-way Solenoid Valve Type 6534 (CF-C, normally closed)
Width per Valve Station	11 mm
Operating Pressure Range	-1.0 bar to 10.0 bar (vacuum to 10 bar)
Pilot Pressure Range	3 bar to 10 bar (internal auxiliary pilot air)
Flow Rate $Q_{\text{Nn}}$ (Air)	310 l/min (measured at +20 °C, 6 bar inlet, $\Delta p = 1$ bar)
Flow Rate with HotSwap Function	Approx. 3% flow reduction
Operating Voltage	24 V DC (±10%), residual ripple 1 Vss
Power Consumption per Valve	0.7 W nominal (0.175 W after internal power reduction)
Current Draw per Valve	29 mA nominal (10 mA after internal power reduction)
Operating Mode	Continuous operation (100% duty cycle)
Protection Class	III according to DIN EN 61140, VDE 0140
Degree of Protection	IP20 standalone; IP65 inside closed cabinet with AirLINE Quick plate
Operating Medium	Oil-free or lubricated dry compressed air, neutral gases (5 µm filtration recommended)
Air Quality Standard	ISO 8573-1:2010, Class 7.4.4
Ambient and Medium Temperature	-10 °C to +55 °C
Storage Temperature	-20 °C to +60 °C
Type Rating (NEMA 250)	Type 4X in closed enclosures with stainless steel version

AirLINE Quick Stainless Steel Adapter

BURKERT 20074352 is configured with the AirLINE Quick adapter interface constructed from 1.4301 (304) stainless steel and fitted with 1.4401 (316) stainless steel push-in fittings. This design enables the terminal to mount flush into the control cabinet floor or wall cutout, projecting the pneumatic connections directly outside the cabinet enclosure.

• Reduced installation footprint: pneumatic piping connects straight through the cabinet floor, eliminating internal bulkheads and intermediate fittings.
• Enclosure integrity: achieves IP65 cabinet sealing, protecting electrical components inside the cabinet from external washdown fluids and moisture.
• Connection ports: primary supply connection 1 (P) utilizes D10 mm push-in tubing; working outlets 2 and 4 utilize D6 mm push-in tubing.

Valve Configuration and Circuit Functions

The 4 valve slots on the 20074352 assembly are factory-populated with four Type 6534 dual 3/2-way normally closed valves (Circuit Function C / CF C), totaling 8 independently actuatable pilot valves. Each valve slice utilizes a 6164 pilot valve operating a servo-controlled spool.

Valve Position	Circuit Function Code	Valve Construction	Normal State	Nominal Diameter	Switching Time Opening	Switching Time Closing
Position 1	2x 3/2-way (CF-C)	Servo-controlled with manual override	Normally closed	4 mm	15 ms	15 ms
Position 2	2x 3/2-way (CF-C)	Servo-controlled with manual override	Normally closed	4 mm	15 ms	15 ms
Position 3	2x 3/2-way (CF-C)	Servo-controlled with manual override	Normally closed	4 mm	15 ms	15 ms
Position 4	2x 3/2-way (CF-C)	Servo-controlled with manual override	Normally closed	4 mm	15 ms	15 ms

Manual Overrides

Each valve slice includes latching and spring-return manual overrides for local commissioning and manual testing.

Fieldbus Communication and Electrical Connections

The terminal incorporates an ME43 Industrial Ethernet communication module with two RJ45 female connectors (labeled X1 and X2), providing line and ring network topology support across multiple industrial protocols:

• PROFINET IO (including PROFINET S2 system redundancy)
• EtherNet/IP
• Modbus TCP
• EtherCAT
• CC-Link IE Field Basic

Industrial Ethernet RJ45 Pin Assignment (X1 and X2)

Pin Number	Signal Assignment
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 Power Supply Connections

Power supply inputs are divided into two isolated terminals on the base interface board to separate communication and pilot valve power circuits:

Terminal Block	Pin / Clip	Wire Color	Signal Assignment	Conductor Cross-Section
5-Pin Spring Terminal (Logic/Bus/Display)	1	Red	+24 V DC	$\le 1.5\text{ mm}^2$
	2	White	CAN_H (büS connection)	$\le 1.5\text{ mm}^2$
	3	Green	Shielding	$\le 1.5\text{ mm}^2$
	4	Blue	CAN_L (büS connection)	$\le 1.5\text{ mm}^2$
	5	Black	GND (0 V DC)	$\le 1.5\text{ mm}^2$
2-Pin Spring Terminal (Pneumatic Valves)	1	Red	AUX +24 V DC	$\le 1.5\text{ mm}^2$
	2	Black	GND (0 V DC)	$\le 1.5\text{ mm}^2$

Digital Input Module (8 DI)

BURKERT 20074352 integrates an 8-channel electronic input module (8DI) to capture end-position feedback directly from process actuators, limit switches, and inductive proximity switches.

Parameter	Value / Characteristic
Number of Digital Inputs	8 channels
Sensor Voltage Supply	24 V DC via electronic module (max. 30 mA per input)
Compatible Sensor Types	2-wire sensors, 3-wire sensors (10–30 V), mechanical limit switches
Switching Thresholds	$V_{\text{OFF}} = 0\text{ to }5\text{ V}$, $V_{\text{ON}} = 10\text{ to }30\text{ V}$
Input Current at $V_{\text{ON}}$	Max. 5.7 mA per channel (typical at 24 V DC)
Input Impedance	$> 4\text{ k}\Omega$
Galvanic Isolation	None (all channels share common reference ground)
Diagnostic Capabilities	Wire-break detection (2-wire sensors); short-circuit detection (3-wire sensors)
Maximum Wiring Length	$< 30\text{ m}$ (wire gauge $\le 1.5\text{ mm}^2$)

Cabinet Installation and Process Safety

Pneumatic HotSwap Operation

The supply channel 1 (P) features integrated non-return valves behind each valve station. When a solenoid valve is unscrewed and lifted from the manifold, the pneumatic seat seals immediately. This prevents pressure drop in adjacent valve stations, allowing maintenance and valve replacement while the pneumatic system remains pressurized.

Cabinet Clearance

To enable unimpeded replacement of valves via the HotSwap function, maintain minimum clearance to the front edge and side walls of the control cabinet as defined in the Type 8652 operating manual.

Integrated Exhaust Check Valves

Integrated check valves inside exhaust ducts 3 (R) and 5 (S) prevent back-pressure propagation. When multiple valves exhaust simultaneously, exhaust pressure surges cannot actuate spring-return single-acting cylinders or cause unplanned actuator movements.

Hazardous Area Special Conditions

When installed in ATEX/IECEx Zone 2 or Class I, Div 2 hazardous environments (PX68/PU17 approvals), HotSwap operations and terminal block disconnections must only be performed when the system is fully de-energized or after confirming that no explosive atmosphere is present.

Dimensions (4-Fold)

Dimensions for the 4-fold basic variant of Type 8652:

Manifold Variant	Dimension A [mm]	Dimension B [mm]	Mounting Fasteners (C)	Module Pitch Index m	Module Pitch Index n
4-fold (Article 20074352)	66 mm	— (not applicable)	4x M5	3	1
8-fold (Reference)	35 mm	111 mm	8x M5	7	2
12-fold (Reference)	77 mm	154 mm	10x M5	11	3

Standard DIN rail mounting according to EN 50022 ($35\times 7.5\text{ mm}$ or $35\times 15\text{ mm}$) is supported in addition to direct floor/wall cutout installation via the AirLINE Quick plate.

Replacement Valves and Accessories

Component Description	Reference / Article No.	Notes
Replacement Valve Type 6534: 2x 3/2-way CF-C (24 V DC)	Article no. 301374 (REF 296031)	Includes mounting screws; identical to the pre-installed valves on 20074352
Replacement Valve Type 6534: 2x 3/2-way CF-D (normally open)	Article no. 301375 (REF 296032)	Optional alternate circuit function
Replacement Valve Type 6534: 5/2-way CF-H	Article no. 301376 (REF 296033)	5/2-way monostable configuration
Dummy / Blanking Plate Valve	Article no. 335779 (REF 327614)	Used to cover unpopulated valve slots
5-Pin Spring-Loaded Terminal Block	Article no. 920180	Logic, display, and communication supply connector
2-Pin Spring-Loaded Terminal Block	Article no. 920442	Auxiliary power connector for pneumatic valves
Screw Set M5 x 10 A2 DIN 6912	Article no. 308661	Pack of 10 screws for securing valve terminal to base
AirLINE Quick Height Adapter (4-fold)	Article no. 60031491	Height leveling plate without intermediate feed
AirLINE Quick Retaining Plate (4-fold)	Article no. 60005571	Exterior cabinet clamping plate for 4-fold variant
USB-büS Interface Set 1 (Type 8923)	Article no. 772426	For PC parameterization via Bürkert Communicator (Type 8920)