BURKERT 20032526 (Type 8652 AirLINE) is a preconfigured 20-slot modular valve terminal engineered specifically for process automation installations. This specific article combines an Industrial Ethernet communication interface supporting PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, and CC-Link IE Field Basic via two RJ45 ports with a stainless steel AirLINE Quick base plate. The assembly accommodates 20 valve stations in an 11 mm slice grid, comprising 14 bistable 5/2-way valves, 3 double 3/2-way normally closed valves, 1 monostable 5/2-way valve, 2 blind covers, and 1 intermediate supply module for optimized air distribution.

Operating across a pneumatic pressure span of -1.00 bar to 10.00 bar with internal pilot air delivery between 3 bar and 10 bar, BURKERT 20032526 integrates stainless steel push-in fittings: D 3/8" on the air supply and exhaust ports and D 1/4" on the actuator working lines. An LC display on the terminal visualizes diagnostic text and standardized icons directly at the unit, while diagnostic telemetry is routed over the industrial network to the supervisory PLC. The electrical subsystem is rated for 24 V DC (±10%) and incorporates an electronic input module supplying 8 digital inputs for field sensor feedback.

Configured 20-Slot Valve Assignment

Article 20032526 is factory-assembled with a dedicated valve slice layout across its 20 stations. The pilot valves utilize low-wear miniature solenoid technology operating at 24 V DC with an initial nominal coil power of 0.7 W, dropping automatically to 0.175 W (10 mA) after actuation to minimize heat generation within control cabinets.

Valve Position	Circuit Function	Description	Manual Override	Nominal Flow Rate (QNn)
Position 1 to 14	CF-Z	5/2-way solenoid valve, impulse/bistable with 2 coils	Latching / spring return	290 l/min
Position 15 to 17	CF-C	2x 3/2-way solenoid valve, normally closed	Latching / spring return	270 l/min
Position 18	CF-H	5/2-way solenoid valve, monostable/spring return	Latching / spring return	290 l/min
Position 19	Blind plate	Dummy plate for pneumatic sealing and future expansion	None	—
Position 20	Blind plate	Dummy plate for pneumatic sealing and future expansion	None	—

Each pneumatic slice features an individual station width of 11 mm. The integrated intermediate pneumatic feed module (1 PCE) is installed between the valve slices to deliver additional supply volume and balance exhaust backpressures across the 20-bank manifold.

AirLINE Quick Adapter and Cabinet Floor Mounting

Article 20032526 features the AirLINE Quick adapter system constructed from stainless steel 1.4301 (ALQ VA) with stainless steel 1.4401 push-in pneumatic connections. This mechanical interface mounts directly through a cutout in the control cabinet bottom or wall, eliminating individual panel-mount bulkhead fittings and internal cabinet pneumatic tubing.

AirLINE Quick Features

• Direct mounting to control cabinet floor or wall cutout
• Stainless steel 1.4301 adapter plate material
• Stainless steel 1.4401 pneumatic connections
• Push-in air supply / exhaust ports: D 10 mm (3/8")
• Push-in working ports to field actuators: D 6 mm (1/4")
• Enclosure protection rating: IP65 inside closed control cabinets, Type 4X rating according to NEMA 250
• Substantial space savings inside the control enclosure, enabling compact panel layouts

Technical Specifications

Parameter Group	Technical Parameter	Value / Specification
Pneumatic Data	Working medium	Dry lubricated or oil-free compressed air, neutral gases (5 µm filtration recommended)
	Air quality class	ISO 8573-1:2010, Class 7.4.4
	Working pressure range	Vacuum to 10 bar (-1.00 bar to 10.00 bar)
	Auxiliary pilot pressure	3 bar to 10 bar (internal auxiliary pilot air)
	Standard nominal flow (QNn)	310 l/min (measured at +20 °C, 6 bar inlet pressure, 1 bar pressure difference)
	Operating mode	Continuous operation (100% duty cycle)
	Valve switching times	Opening: 15–20 ms, Closing: 15–25 ms (measured according to ISO 12238)
Electrical Data	Operating voltage	24 V DC (±10%)
	Residual ripple	1 Vss
	Nominal power per valve	0.7 W per coil (0.175 W after holding current reduction)
	Nominal current per valve	29 mA (10 mA after current reduction)
	Protection class	Class III according to DIN EN 61140, VDE 0140
Mechanical & Materials	Body housing material	PA (Polyamide)
	Seal materials	NBR and PUR
	Adapter plate material	Stainless steel 1.4301
	Pneumatic port fittings	Stainless steel 1.4401
	Station width per valve	11 mm
Thermal & Ambient	Ambient temperature range	-10 °C to +55 °C
	Medium temperature range	-10 °C to +55 °C
	Storage temperature range	-20 °C to +60 °C
	Degree of protection	IP20 (bare unit), IP65 (installed on closed cabinet with AirLINE Quick)

Industrial Ethernet Communication & Electrical Interfaces

BURKERT 20032526 incorporates an ME43 fieldbus gateway module configured for multi-protocol Industrial Ethernet. Network integration is implemented through two M12-equivalent RJ45 ports (X1 and X2), enabling line and ring topologies without requiring external industrial switches.

Industrial Ethernet RJ45 Pin Assignment (X1 and X2)

Pin	Signal	Assignment Description
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

Separate Power Supplies

The valve terminal utilizes physically separated power connections for electronics and valve actuators. Logic, communications, and LC displays are energized via a 5-pin spring-loaded terminal. Solenoid valve coils are powered through an independent 2-pin spring-loaded auxiliary terminal (AUX 24 V). This allows emergency disconnection of valve actuation power without dropping network communication or process diagnostics.

Power Supply Terminal Pinouts

Terminal Block	Terminal / Pin	Wire Colour	Assignment
5-pin spring-loaded terminal (Logic & Display)	Pin 1	Red	+24 V DC
	Pin 2	White	CAN_H (büS connection)
	Pin 3	Green	Shielding
	Pin 4	Blue	CAN_L (büS connection)
	Pin 5	Black	GND (0 V DC)
2-pin spring-loaded terminal (Valve Actuation Power)	Terminal 1	Red	AUX 24 V DC
	Terminal 2	Black	GND (0 V DC)

Both terminal connections accept rigid or flexible conductors up to 1.5 mm² cross-section.

Digital Inputs and Sensor Interfacing

In article 20032526, electronic module 5 is equipped with an 8-channel digital input board (8DI), providing feedback processing from discrete plant sensors and limit switches.

8DI Module Technical Parameters

• Supply output: 24 V DC provided to sensors, current limited to maximum 30 mA per input
• Compatible sensor types: standard 3-wire sensors, 2-wire sensors (10–30 V DC), and mechanical limit switches
• Input threshold voltages: $V_{OFF} = 0\dots5\text{ V DC}$, $V_{ON} = 10\dots30\text{ V DC}$
• Input current at $V_{ON}$: maximum 5.7 mA per channel (typical at 24 V DC)
• Input impedance: > 4 kΩ
• Galvanic isolation: None (all channels share common reference ground)
• Maximum field cable length: < 30 m (conductor cross-section ≤ 1.5 mm²)

Sensor Diagnostics Matrix

Diagnostic Condition	3-Wire Sensors	2-Wire Sensors	Mechanical Limit Switches
Sensor actuated	Yes	Yes	Yes
Sensor not actuated	Yes	Yes	Yes
Short-circuit detection	Yes	—	—
Wire-break detection	—	Yes	—

Network Topology and System Integration

BURKERT 20032526 can function as a primary master valve terminal on Industrial Ethernet while coordinating downstream büS/CANopen valve islands or Bürkert EDIP devices.

Parameters, cycle configurations, and live diagnostic monitoring can be managed via Bürkert Communicator software (Type 8920) through a USB büS interface set.

Dimensions and Installation Guidelines

Mounting inside an electrical enclosure requires maintaining specific physical clearances around the valve slices and AirLINE Quick plate.

Dimensional Values for 20-Slot Variant with Intermediate Supply

Dimension Code	Description	Value (mm)
A	Mounting hole spacing to intermediate module	134 mm
B	Total mounting hole length span	268 mm
C	Fastening screw holes	10 x M5
D	Center-to-center offset dimension	158.3 mm
m	Valve station count group 1	11 slots
m'	Valve station count group 2	7 slots
n	Mounting section count	5

Maintenance Clearance

When positioning the valve island within the cabinet, maintain adequate clearance to the front door and side panels to facilitate module servicing and display inspection. Refer to the Type 8652 operating instructions for exact spatial guidelines.

Approvals, Standards & Hazardous Location Compliance

BURKERT 20032526 complies with the following industrial standards and safety certifications:

• cULus Listed: Electrical Equipment for Measurement, Control, and Laboratory Use pursuant to UL 61010-1 and CAN/CSA-C22.2 No. 61010-1.
• Enclosure Protection: NEMA 250 Type 4X rating when mounted in closed stainless steel enclosures using the stainless steel AirLINE Quick interface.
• CE / EU Directives: Conforms to applicable European directives.

Hazardous Location Operations

For installations in classified hazardous environments (ATEX/IECEx Zone 2/22, cURus HazLoc Class I Div 2 Groups A–D, Class II/III Div 2 Groups F–G):

1. The valve island must be installed inside an enclosure providing at least IP54 protection for gas atmospheres or IP6X for combustible dust atmospheres.
2. Ensure transient voltage suppression prevents power disturbances from exceeding 140% of peak rated voltage.
3. Do not disconnect or insert terminal plugs (24 V power, SIA, EVS, digital inputs) while energized in an explosive atmosphere unless the location is verified to be non-hazardous.
4. Hot-swapping valve slices is strictly prohibited in hazardous atmospheres unless the surrounding area is confirmed non-explosive using approved testing apparatus.

Ordering Data & Replacement Components

Replacement Pilot Valves (Type 6534)

Circuit Function	Operating Principle	QNn (Air)	Pressure Range	Opening Time	Closing Time	Voltage	Order Article No. (incl. screws)
CF-Z	5/2-way bistable impulse with 2 coils	290 l/min	Vac. to 10 bar	20 ms	25 ms	24 V DC	301377 (Spare set: 296034)
CF-C	2x 3/2-way normally closed	270 l/min	Vac. to 10 bar	15 ms	15 ms	24 V DC	301374 (Spare set: 296031)
CF-H	5/2-way monostable	290 l/min	Vac. to 10 bar	20 ms	25 ms	24 V DC	301376 (Spare set: 296033)
Blind Plate	Dummy valve cover	—	—	—	—	—	335779 (Spare set: 327614)

Associated Hardware and AirLINE Quick Accessories

Item Description	Quantity	Order Article No.
Spring-loaded terminal 5-pin (Logic and LC display power supply)	1 PCE	920180
Spring-loaded terminal 2-pin (Valve actuation power AUX 24 V)	1 PCE	920442
ME43 Fieldbus Gateway Module (Industrial Ethernet: PROFINET, EtherNet/IP, Modbus TCP, EtherCAT)	1 PCE	301799
AirLINE Quick Height Adapter for 20-slot base with intermediate feed	1 PCE	754963
AirLINE Quick Retaining Plate for 20-slot base with intermediate feed	1 PCE	60005569
AirLINE Quick Blind Plate for 20-slot base with intermediate feed	1 PCE	754968
Fastening screw set M5 x 10 A2 DIN 6912 (for securing island to cabinet floor)	10 PCE	308661
USB büS Interface Set 1 (Type 8923) for Bürkert Communicator software	1 Set	772426
Bürkert Communicator Software	Software	Type 8920