BURKERT 20114064 Type 8647 AirLINE SP is a modular electro-pneumatic valve island engineered for direct integration into Siemens SIMATIC ET 200SP and SIMATIC ET 200SP HA distributed I/O systems. This specific assembly features an 8-bank layout accommodating 8 valve stations at an 11.00 mm station width, utilizing a mixed valve population with 3/2-way valve functionality. The operating pressure spans from 2.50 bar to 10.00 bar, with an allowable medium temperature of 0.00 °C to 50.00 °C and an ambient operating temperature of 0.00 °C to 55.00 °C.

Constructed according to Revision 2 (REV.2) specifications, the assembly incorporates an integrated electronic pressure sensor providing analog pressure values via the fieldbus, a pneumatic HotSwap function via channel 1 (P) shutoff, and integrated non-return check valves in exhaust ducts 3 (R) and 5 (S). Certified under ATEX and IECEx for Category II 3 G Ex ec IIC T4 Gc, the system is designed for cabinet mounting with an IP20 ingress protection rating.

System Architecture and Module Composition

AirLINE SP Type 8647 acts as an electro-pneumatic sub-system that mechanically connects and electrically communicates with adjacent Siemens modules along a shared DIN standard rail. The valve island consists of supply connection units, pneumatic base modules, electronic base modules (PQ modules), and integrated pilot solenoid valves.

Connection Units (PSU)

Connection units anchor the valve block to the standard rail, supply primary compressed air, and route exhaust air. Configuration 20114064 includes one integrated electronic pressure sensor module (PSU-L-PS or PSU-R-PS):

• Measures line pressure from 0 to 10 bar relative to atmosphere with 0.2 bar precision.
• Outputs high/low warning and error limits via diagnostic bytes.
• Features five visual LEDs: two module status LEDs (PWR OK, DIAG) and three pressure status LEDs.
• Contains an internal hardware blow fuse protecting the supply circuit.

Valve Units (PQ and Base Modules)

The 8-bank assembly utilizes electronic and pneumatic base units designed for station widths of 11 mm:

• Electronic Base Modules (PQ Modules): Interface electrical control signals from the Siemens backplane bus to the pilot solenoids. They feature a graphical LC display displaying valve status, process feedback, or pressure readings, alongside channel status LEDs and resettable electronic fuses on each output.
• Pneumatic Base Modules: Form the fluidic manifold with bottom-facing D6 push-in connectors. In REV.2, the working ports are arranged in a wavy channel pattern with blue release rings on push-in fittings.

Revision 2 (REV.2) Design Standard

In Revision 2 hardware, single valves (Type 6524 3/2-way, Type 6525 5/2-way) and double valves (Type 6524 2x3/2-way) share a standardized FM20 flange interface. Single valves from REV.1 (FM14 flange) cannot be mounted onto REV.2 pneumatic base modules.

Technical Specifications

Parameter	Technical Value
Product Identifier (SKU)	20114064
Device Type Family	AirLINE SP Type 8647
Generation / Hardware State	Revision 2 (REV.2)
Valve Slot Count	8 slots (8-bank)
Width per Station	11.00 mm
Valve Function	Mixed valve population (3/2-way configuration)
Operating Medium	Compressed air oiled or unoiled, neutral gases (ISO 8573-1: 2010, Class 7.4.4)
Nominal Operating Pressure	2.50 bar to 10.00 bar
Pressure Sensor Measuring Range	0 to 10 bar (overpressure resistance up to 14 bar)
Medium Temperature Range	0.00 °C to +50.00 °C
Permissible Ambient Temperature	0.00 °C to +55.00 °C
Storage Temperature Range	-20.00 °C to +60.00 °C
Relative Humidity	75% average, 85% occasionally (non-condensing)
Explosion Protection Rating	II 3 G Ex ec IIC T4 Gc / Ex ec IIC T4 Gc (ATEX, IECEx)
Ingress Protection Class	IP20 (verified according to EN 60529)
Housing Materials	PA, PC (Valves: PA, PPS, Aluminum; Seals: NBR)
Operating Voltage	24 V DC (±10% SELV/PELV, max. ripple 2.4 Vss)
Load Voltage Bus Current	Up to 3 A maximum depending on activation load
Solenoid Power Consumption	0.8 W per single coil (Type 6524 / 6525)

Pneumatic Configuration and Port Layout

Primary air supply and deaeration occur through G 1/4 female thread connections located on the connection units. Actuator air delivery routes through push-in couplings located on the underside of the pneumatic base module.

Port Allocation Details

Position	Port Identification	Port Function	Connection Dimension
1	R/3, S/5	Common exhaust air	G 1/4 female thread
2	X	Auxiliary pilot air / pilot exhaust	M5 thread
3	P/1	Primary pressure supply	G 1/4 female thread
Working Ports	2, 4	Working outputs to pneumatic actuators	Push-in coupling D6 (bottom)

Tightening Torques for Pneumatic Ports

• G 1/4 Connections (P, R/S): Recommended 4 to 7 Nm (maximum 20 Nm).
• M5 Auxiliary Connections (X): Recommended 1 to 1.2 Nm (maximum 3 Nm).

Pneumatic HotSwap and Non-Return Check Valves

Configuration 20114064 includes integrated check valves in exhaust ducts 3 (R) and 5 (S), which stop back pressure from migrating into non-actuated lines during simultaneous switching or safety venting. The integrated channel 1 (P) shutoff mechanism enables valve replacement under continuous line pressure: when removing a pilot valve, an internal shutoff valve seals the primary pressure line, dropping leakage to a minimal level and preserving full operational pressure across neighboring valve stations. In REV.2, nominal flow reduction through the P-shutoff channel is limited to approximately 20% (compared to 50% in older REV.1 blocks).

Electrical Integration and Control Configuration

AirLINE SP Type 8647 interfaces electrically via the internal backplane bus and power rail of the Siemens SIMATIC ET 200SP or ET 200SP HA base units. Power consumption from the 24 V DC load bus is monitored constantly. If supply voltage drops below 21.6 V (24 V - 10%), the PWR OK LED on connection module PSU-L extinguishes, output channels are shut down to prevent unstable valve states, and a "No supply voltage" diagnostic alert is dispatched.

System Configuration Tools

Integration into automation architectures is supported through:

• GSD / GSDML Files: Direct integration into PROFINET (subfolder Pneumatics (Burkert)) and PROFIBUS DP masters.
• Hardware Support Packages (HSP): HSP0225 for TIA Portal (V14 SP1 or higher) and HSP2105 for STEP 7 Classic (V5.5 SP4 or higher).
• Hardware Update Packages (HUP): Dedicated HUP support under SIMATIC PCS 7 (V9.0 SP2 or higher).

Diagnostic Architecture and Counter Records

Each channel provides independent switching cycle counters for both the pilot solenoid valve and the field actuator. Data record DS 130 provides read-only cycle data for pilot valves, while DS 131 tracks actuator movements. Reset operations are executed over acyclic communication via data record DS 132. Service dates can be recorded in DS 133 (last maintenance) and DS 134 (next maintenance) using BCD notation.

EVS Circuit Isolation

When utilizing base modules with External Valve Shutdown (EVS), connect each EVS terminal solely to a potential-free contact such as a relay output. Never apply external voltage to EVS terminals, and never parallel several EVS terminals across different modules, as cross-coupling creates severe failure hazards.

Installation and Maintenance Procedures

Installation requires mounting onto a grounded DIN rail (profile rail for ET 200SP HA). The valve block is delivered fully assembled and secured with transportation screws that must be released before cabinet installation.

Installation Clearance

Maintain a minimum clearance of 5 cm between the top edge of the valve block and any overhead cabinet obstruction to allow heat dissipation and rail disengagement. If electronic base modules equipped with top-mounted EVS terminals are installed, increase clearance to at least 8 cm.

Valve Replacement under Pressure (HotSwap)

Thanks to the integrated P shutoff mechanism, solenoid valves can be serviced without depressurizing the main air header:

1. Secure downstream actuators mechanically before dismounting valves, as residual pressure in actuator lines A and B exhausts upon valve removal.
2. Loosen the valve fastening screws using a suitable screwdriver.
3. Pull the defective valve along with its profile flange seal off the pneumatic base station.
4. Position the replacement REV.2 valve equipped with a brand-new profile gasket into the guide slot.
5. Tighten the fastening screws in diagonal pairs to ensure uniform seal seating.