BURKERT 20033774 (Type 8652) is an AirLINE 12-slot electro-pneumatic valve island factory-configured for process automation architectures requiring PROFIBUS DPV1 fieldbus communication. The unit integrates 12 pneumatic valve slots populated with 7 active dual 3/2-way normally closed solenoid valve modules (circuit function C) and 5 blind plates for future expansion. Pneumatic supply and exhaust routing pass through an anodised aluminium AirLINE Quick adapter plate featuring D10 mm brass supply push-in fittings and D6 mm brass working port push-in fittings.

Process safety features built into article 20033774 include integrated check valves installed directly in exhaust channels 3 (R) and 5 (S), preventing unexpected actuator travel caused by backpressure spikes. The supply port 1 (P) incorporates a pneumatic HotSwap mechanism, allowing hot replacement of individual 6534 pilot valves under active operating pressure with an air flow reduction of approximately 3%.

Pre-Configured Slot Allocation

Article 20033774 provides factory assembly across 12 station positions with internal auxiliary pilot feed and zero intermediate supply feeds:

Valve Position	Installed Module	Circuit Function	Status
Position 1	2x 3/2-way solenoid valve	CF-C (Normally Closed)	Active
Position 2	2x 3/2-way solenoid valve	CF-C (Normally Closed)	Active
Position 3	2x 3/2-way solenoid valve	CF-C (Normally Closed)	Active
Position 4	2x 3/2-way solenoid valve	CF-C (Normally Closed)	Active
Position 5	2x 3/2-way solenoid valve	CF-C (Normally Closed)	Active
Position 6	2x 3/2-way solenoid valve	CF-C (Normally Closed)	Active
Position 7	Blind plate module	—	Inactive / Spare
Position 8	Blind plate module	—	Inactive / Spare
Position 9	2x 3/2-way solenoid valve	CF-C (Normally Closed)	Active
Position 10	Blind plate module	—	Inactive / Spare
Position 11	Blind plate module	—	Inactive / Spare
Position 12	Blind plate module	—	Inactive / Spare

Technical Specifications

Parameter	Specification
Body Material	PA (Polyamide)
Seal Material	NBR and PUR
Station Width	11 mm per valve slice
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 $Q_{Nn}$ (Air)	310 l/min (at +20 °C, 6 bar inlet, 1 bar differential pressure)
Flow Reduction with HotSwap	Approx. 3% reduction
Operating Medium	Oil-free or lubricated dry compressed air, neutral gases
Compressed Air Quality	ISO 8573-1:2010, Class 7.4.4 (5 μm filtration recommended)
Operating Voltage	24 V DC (±10%), residual ripple 1 Vss
Nominal Power per Valve	0.7 W inrush; 0.175 W continuous holding after power reduction
Nominal Current per Valve	29 mA inrush; 10 mA holding after power reduction
Duty Cycle	100% continuous operation (ED)
Switching Times (ISO 12238)	Opening: 15 ms; Closing: 15 ms
Protection Class	III according to DIN EN 61140, VDE 0140
Degree of Protection	IP20 bare terminal; IP65 inside closed cabinet with AirLINE Quick
Ambient & Medium Temperature	-10 °C to +55 °C
Storage Temperature	-20 °C to +60 °C

AirLINE Quick Adapter Plate

The AirLINE Quick adapter interface attaches article 20033774 directly into the control cabinet floor or wall cut-out, routing pneumatic lines directly to the cabinet exterior. This eliminates internal bulkhead fittings and saves enclosure volume.

Interface Feature	Technical Specification
Adapter Plate Material	Anodised aluminium
Supply Port Connection Size	Push-in D10 mm, nickel-plated brass / brass
Working Port Connection Size	Push-in D6 mm, nickel-plated brass / brass
Available Station Capacities	8, 16, 24, 32, 40, and 48 valve functions
Mounting Orientation	Control cabinet floor or control cabinet wall

Electrical and Communication Interfaces

Fieldbus communication is handled through a 9-pin Sub-D female interface implementing the PROFIBUS DPV1 protocol:

Pin	PROFIBUS DPV1 Sub-D (9-Pin) Assignment
1	Shielding
2	M24 (optional)
3	RxD/TxD-P (B-line)
4	CNTR-P (optional)
5	DGND
6	+5 V (supply for bus terminating resistor)
7	+24 V (optional)
8	RxD/TxD-N (A-line)
9	CNTR-N (optional)

Power supply inputs require separate circuits for logic/communication and pneumatic valve actuation:

5-Pin Spring Terminal (Logic/Display)	Color	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)

2-Pin Spring Terminal (Pneumatic Valves)	Terminal	Color	Signal Assignment
Pin 1	1	Red	AUX +24 V DC
Pin 2	2	Black	0 V DC (GND)

Power Supply Separation

Pneumatic pilot valves and fieldbus logic modules must be powered independently using dedicated supply lines to isolate switching noise and ensure fail-safe emergency cut-off capability.

Dimensions

Variant	A (mm)	B (mm)	C (Mounting Screws)	m (Pitch)	n (Stations)
4-fold	66	—	4 × M5	3	1
8-fold	35	111	8 × M5	7	2
12-fold (20033774)	77	154	10 × M5	11	3

Mounting is supported either on standard DIN rails (EN 50022 35 × 7.5 or 35 × 15) or directly via M5 mounting screws through the AirLINE Quick plate.

Cabinet Installation and HotSwap Maintenance

To replace valve slices under line pressure using the pneumatic HotSwap function, maintain minimum clearance between the valve island front and the cabinet door or obstacle. The assembly integrates an interface plate without modular shut-off and requires free swivel space for unlatching valve modules.

Explosion Protection Conditions

Hazardous Area Operating Restrictions

When installed under ATEX/IECEx Zone 2/22 conditions (II 3G Ex ec IIC Gc / II 3D Ex tc IIIC Dc, certificate BVS 20 ATEX E 031 U / IECEx BVS 20.0024 U):

• Do not connect or disconnect electrical spring terminals while circuits are energized.
• Pneumatic HotSwap replacement of valves is prohibited in explosive atmospheres unless the area is proven non-hazardous by testing equipment.
• The terminal must be housed in an enclosure providing at least IP54 (Zone 2) or IP6X (Zone 22) according to EN/IEC 60079-0.
• Transient protection must limit voltage spikes to 140% of the nominal peak supply voltage.

Replacement Valves and Accessories

Component Description	Order Article No.
Type 6534 Replacement Valve, 2x 3/2-way CF-C, 24 V DC (incl. screws)	301374 (REF_296031)
Type 6534 Blind Plate / Dummy Valve (incl. screws)	335779 (REF_327614)
Fieldbus Gateway Module Type ME43 – Profibus DP	301803
5-Pin Spring-Loaded Terminal Block (Bus/Display Supply)	920180
2-Pin Spring-Loaded Terminal Block (Valve Supply AUX 24 V)	920442
AirLINE Quick Height Adapter 12-Slot (without intermediate feed)	754961
AirLINE Quick Retaining Plate 12-Slot (without intermediate feed)	60005567
Fastening Screw Set M5 × 10 A2 DIN 6912 (10 pcs)	308661
Bürkert Communicator Software Type 8920	Type 8920
USB büS Interface Set 1 (Type 8923) for PC configuration	772426