The BURKERT 8644 AirLINE SP electropneumatic automation system represents a universal interface between process and system control. It integrates electric and pneumatic building blocks into an assembly, enabling a modular and flexible structure of fieldbus modules, pilot valves, and I/O modules thanks to simple locking technology on the standard rail.

The system features direct connection to the WAGO I/O System 750, an innovative fieldbus interface, compact design, high flexibility, and high flow rates.

General Technical Data

Product properties	Type 0460, Type 6524, Type 6525	Type 0461, Type 6526, Type 6527
Material
Body	PA (polyamide), aluminium (Type 0460)	PA (polyamide), aluminium (Type 0461)
Seal	FKM, NBR and PUR	NBR
Maximum installation width
Width per station	11 mm	16.5 mm
Manual override	Standard	Standard
Number of valve slots	For single valves: max. 64 For impulse and double valves: max. 32	Max. 32 When using Type 0461: 24
Maximum number of valve functions	Max. 64	Max. 32
Pneumatic intermediate supply	Necessary for single valves after 24 valve functions. Necessary after 16 valve functions for double valves	Necessary after 16 valve functions
Performance data
Pressure data	Overpressure to atmospheric pressure	Overpressure to atmospheric pressure
Pressure range	Vac...10 bar	Vac...10 bar
External supply air	>2.5 bar (Type 0460: not possible)	>2.5 bar (Type 0461: not possible)
Flow rate $Q_{\text{Nn}}$ value air	200...300 l/min	500...700 l/min
Nominal operating mode	Continuous operation (100 % duty cycle)	Continuous operation (100 % duty cycle)
Electrical data
Operating voltage	24 V DC	24 V DC
Voltage tolerance	+20%/-15% (when using Type 0460: ±10%)	+20%/-15% (when using Type 0461: ±10%)
Residual ripple (at DC)	1 Vss	1 Vss
Nominal power of each valve	For single valves: 0.8 W For impulse and double valves: 2× 0.8 W with power reduction	2 W, 1 W
Nominal current of each valve	43 mA (28 mA holding current after 120 ms) 41 mA (when using Type 0460)	85 mA (52 mA holding current after 120 ms) 41 mA (when using Type 0461)
Protection class	III according to VDE 106, IEC 60536	III according to VDE 106, IEC 60536
Medium data
Operating medium	Oil-free or lubricated compressed dry air (5 μm filter recommended)	Oil-free or lubricated compressed dry air (5 μm filter recommended)
Compressed air quality	ISO 8573 - 1: 2010, Class 7.4.4	ISO 8573 - 1: 2010, Class 7.4.4
Approvals and conformities
Degree of protection	IP20 IP65 in closed control cabinets	IP20 IP65 in closed control cabinets
Product connections
Working connection	D 4, D 6, D 1/4, D 8, NPT 1/8, G 1/8	D 8, NPT 3/8, G 1/8
Air supply connection	G 1/4, NPT 1/4, D 10, G 3/8, NPT 3/8	G 3/8, NPT 3/8
Communication module	WAGO I/O System 750	WAGO I/O System 750
Communication interface	PROFIBUS DP, INTERBUS, DeviceNet, CANopen, Ethernet. Others on request	PROFIBUS DP, INTERBUS, DeviceNet, CANopen, Ethernet. Others on request
Environment and installation
Installation position	As required, preferably with actuator upright	As required, preferably with actuator upright
Storage temperature	-20 °C...+60 °C	-20 °C...+60 °C
Ambient temperature	0 °C...+55 °C (when using Type 0460: 0 °C...+50 °C)	0 °C...+55 °C (when using Type 0461: 0 °C...+50 °C)

Circuit Functions

Symbol	Description
	Circuit function C (CF C) 3/2-way solenoid valve Servo-controlled, with manual override Normally closed
	Circuit function C (CF C) 2 × 3/2-way solenoid valve Servo-controlled, with manual override Normally closed
	Circuit function D (CF D) 3/2-way solenoid valve Servo-controlled, with manual override Normally open
	Circuit function H (CF H) 5/2-way solenoid valve Servo-controlled, with manual override Pressure applied via port (1), therefore one of the two ports (2) or (4) is under pressure.
	Circuit function L (CF L) 5/3-way solenoid valve With manual override In middle position all ports locked
	Circuit function N (CF N) 5/3-way solenoid valve With manual override In middle position ports 2 and 4 exhausted
	Circuit function Z (CF Z) 5/2-way solenoid valve Impulse variant with 2 coils and manual override Pressure applied via port (1), therefore one of the two ports (2) or (4) is under pressure.

Approvals and Conformities

• Explosion protection: As a category 3 device suitable for zone 2 (optional). ATEX: PTB 15 ATEX 2001 XII 3G Ex ec IIC T4 Gc. IECEx: IECEx PTB 16.0014 X Ex ec IIC T4 Gc.
• North America (USA/Canada): Optional: UL Listed for the USA and Canada according to UL 61010-1 and CAN/CSA-C22.2 No. 61010-1.

Dimensions

Type 8644 with valves Type 6524/6525 (11 mm width per station)

Type 8644 with single valve Type 6526/6527 (16.5 mm width per station)

Example Configuration