BURKERT 20000846 (Type 8652 AirLINE) is a 16-valve-slot electro-pneumatic automation valve island configured with 16 dual 3/2-way normally closed (CF-C) Type 6534 pilot valves, providing 32 independently controlled pneumatic channels. Developed specifically for process automation environments, the unit integrates an LC display that shows diagnostic alerts in clear text and standardized symbols, while transmitting status messages directly to higher-level controllers. Hardware configuration is optimized for direct cabinet base mounting via an AirLINE Quick stainless steel adapter plate, eliminating pass-through bulkheads and external tubing inside the enclosure.

Equipped with 32 digital inputs distributed across four 8DI electronic modules, BURKERT 20000846 records feedback from mechanical switches, 2-wire sensors, and 3-wire sensors with open-circuit and short-circuit monitoring. Process safety is supported by integrated check valves in exhaust channels 3 (R) and 5 (S), preventing unexpected actuator travel triggered by exhaust back-pressure spikes. An integrated pneumatic HotSwap check valve in supply channel 1 (P) permits valve replacement during active plant operation without interrupting manifold supply pressure.

Technical Specifications

Technical Parameter	Specification
Valve Island Type	Type 8652 AirLINE
Article Number	20000846
Number of Valve Slots	16 slots (16 PCE)
Width per Station	11 mm
Configured Pilot Valves	16x Type 6534 dual 3/2-way CF-C (normally closed)
Actuated Valve Functions	32 pneumatic functions
Body Material	Polyamide (PA)
Seal Material	NBR and PUR
AirLINE Quick Plate Material	Stainless steel 1.4301
Pneumatic Fitting Material	Stainless steel 1.4401
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 auxiliary feed)
Nominal Flow Rate QNn (Air)	310 l/min (reduced ~3% with HotSwap)
Supply Port Connection (1 / P)	Push-in connector D10 mm, stainless steel
Working Port Connections (2, 4)	Push-in connectors D6 mm, stainless steel
Additional Air Supply Ports	Left, right, and intermediate module (D6 and D10 push-in)
Intermediate Feed Quantity	1 PCE (middle supply module installed)
Integrated Check Valves	Ports 3 (R) and 5 (S)
Integrated Pneumatic HotSwap	Port 1 (P)
Digital Inputs	32 inputs (4x 8DI modules, max 30 mA per input)
Operating Voltage	24 V DC (±10%, residual ripple 1 Vss)
Nominal Power per Valve	0.7 W (0.175 W after holding current reduction)
Nominal Current per Valve	29 mA (10 mA after power reduction)
Degree of Protection	IP20 bare; IP65 / NEMA Type 4X installed in closed enclosure
Ambient / Medium Temperature	-10 °C to +55 °C
Storage Temperature	-20 °C to +60 °C
Operating Medium	Oil-free or lubricated dry compressed air, neutral gases (5 µm filtration recommended; ISO 8573-1:2010 Class 7.4.4)
Fieldbus Gateway Module	ME43
Supported Industrial Ethernet Protocols	PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, CC-Link IE Field Basic
Fieldbus Hardware Interface	2x RJ45 ports (X1 and X2)

AirLINE Quick Interface and Mounting

BURKERT 20000846 integrates the AirLINE Quick adapter system, allowing direct mounting to the control cabinet floor or cabinet wall. By passing pneumatic push-in connections directly through the cutout, tubing stays outside the electrical cabinet, reducing space requirements and enabling compact enclosure layouts.

Cabinet Space Optimization

Mounting the valve terminal directly onto the cabinet floor via the AirLINE Quick stainless steel plate eliminates individual bulkheads and simplifies internal wire management, allowing smaller enclosure footprints while sustaining NEMA 4X / IP65 enclosure integrity.

AirLINE Quick Feature	Specification for 20000846
Adapter Plate Material	Stainless steel 1.4301
Push-in Connection Material	Stainless steel 1.4401
Pneumatic Supply / Exhaust Ports	Push-in D10 mm
Pneumatic Working Ports	Push-in D6 mm
Mounting Position	Control cabinet floor or control cabinet wall

Circuit Function and Valve Configuration

All 16 valve slots of 20000846 are fitted with Type 6534 dual 3/2-way servo-controlled solenoid valves in Circuit Function C (CF C), providing 32 independent normally closed pneumatic control circuits. Each valve features manual override with spring return and latching capability.

Circuit Function	Symbol & Type	Valve Action	Flow Rate QNn	Pressure Range
CF C (2x 3/2-way)	Dual 3/2-way solenoid valve, servo-controlled, manual override	Normally closed (NC) in de-energized state	270–310 l/min (air)	-1 to 10 bar (pilot 3 to 10 bar)

Separate Power Supplies

The valve terminal interface uses dedicated power connections. Communication electronics, display logic, and digital input modules are powered via a 5-pin spring-loaded terminal, while the pneumatic valve coils are powered independently via a 2-pin AUX 24 V terminal. This separation prevents electrical disturbances from interfering with fieldbus communications.

Dimensions and Cabinet Installation

BURKERT 20000846 is configured as a 16-valve-slot island with one intermediate pneumatic supply/exhaust module. Dimensions correspond to the 16-fold terminal with intermediate feed.

Terminal Variant	Dimension A (mm)	Dimension B (mm)	Dimension C (Fastening)	Dimension D (mm)	Valve Slots m	Valve Slots m'	Modules n
16-fold with intermediate supply	112	224	10x M5	114.3	7	7	4
20-fold with intermediate supply	134	268	10x M5	158.3	11	7	5
24-fold with intermediate supply	156	312	10x M5	158.3	11	11	6

To ensure proper valve replacement using the HotSwap mechanism inside the control cabinet, observe minimum installation clearances between the terminal assembly, cabinet rear wall, and cabinet door.

Product Assembly and Interfaces

Communication and Display Power Supply (5-pin Spring Terminal)

Terminal Pin	Lead Colour	Signal Assignment
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	0 V DC (GND)

Pneumatic Valve Power Supply (2-pin Spring Terminal)

Terminal Clip	Lead Colour	Signal Assignment
Clip 1	Red	AUX +24 V DC (valve coil supply)
Clip 2	Black	0 V DC (GND)

Industrial Ethernet Dual-Port Interface (X1 and X2 RJ45)

Pin	Industrial Ethernet Signal	Function
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

Digital Input Modules (32 DI)

BURKERT 20000846 incorporates four 8DI electronic modules, delivering 32 digital inputs for direct connection of field feedback devices. Power (24 V DC) is provided directly by each electronic module, limited to 30 mA per channel.

Input Parameter	Specification
Supported Sensor Types	2-wire sensors (10–30 V), 3-wire sensors, mechanical limit switches
Switching Thresholds	V_OFF = 0 to 5 V; V_ON = 10 to 30 V
Input Current at V_ON (typ. 24 V DC)	Max. 5.7 mA per channel
Input Impedance	> 4 kΩ
Galvanic Isolation	No (common reference potential for all channels)
Diagnostics	Wire-break detection on 2-wire sensors, short-circuit detection on 3-wire sensors
Maximum Cable Length	< 30 m (conductor cross-section ≤ 1.5 mm²)

Diagnostic Feedback State	3-Wire Sensor	2-Wire Sensor	Mechanical Limit Switch
Sensor Actuated	Detected	Detected	Detected
Sensor Not Actuated	Detected	Detected	Detected
Short Circuit	Detected	Not applicable	Not applicable
Wire Break	Not applicable	Detected	Not applicable

Network Architecture and Configuration

The ME43 fieldbus gateway on BURKERT 20000846 acts as an Industrial Ethernet master device, interfacing directly with plant PLCs via PROFINET IO, EtherNet/IP, Modbus TCP, EtherCAT, or CC-Link IE Field Basic. Subordinate Type 8652 valve islands can be integrated into the network as büS slaves via standard M12/büS wiring.

Hazardous Area and Operational Safety

BURKERT Type 8652 valve islands carry certifications for installation in hazardous areas when housed in compliant control cabinets.

Regulatory Approval	Classification Details
ATEX Certificate	BVS 20 ATEX E 031 U; II 3G Ex ec IIC Gc / II 3D Ex tc IIIC Dc
IECEx Certificate	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, Div 2, Gr A, B, C, D; Class II, III, Div 2, Gr F, G
China Compulsory Certification (CCC)	Certified for hazardous locations under GB/T 3836
Enclosure Rating	NEMA 250 Type 4X in closed cabinets with stainless steel adapter

Hazardous Location & Hot Swap Restrictions

For installations in Zone 2 and Zone 22 hazardous areas, the valve island must be installed inside an enclosure providing at least IP54 protection for gas (3G/Gc) or IP6X for dust (3D/Dc). Disconnecting or connecting terminal blocks, power plugs, and field wiring while energized is strictly prohibited unless the atmosphere is confirmed non-explosive. The HotSwap valve replacement function must only be executed in hazardous areas when test equipment confirms no explosive atmosphere is present.

Ordering and Component Spare Parts

Component Description	Part / Article Number
Valve Island Type 8652 (16-bank, CF-C, 32 DI, stainless steel AirLINE Quick)	20000846
Replacement Valve Type 6534, 2x 3/2-way CF-C (normally closed, 24 V DC)	301374 (REF 296031)
Replacement Electronic Module with Digital Inputs (8DI)	384872
5-Pin Spring-Loaded Terminal Block (logic and communication power)	920180
2-Pin Spring-Loaded Terminal Block (AUX 24 V valve coil power)	920442
Replacement Gateway Module ME43 Industrial Ethernet	301799
AirLINE Quick Screw Set M5x10 A2 DIN 6912 (10 pcs)	308661
Height Adapter for 16-Fold Base with Intermediate Feed	754962
External Retaining Plate for 16-Fold Base with Intermediate Feed	60005568
Blind Plate for 16-Fold Base with Intermediate Feed	754967