Burkert 20075853 Type 8647 AirLINE SP is a modular electropneumatic automation system and 12-bank pneumatic valve island engineered for direct integration into Siemens SIMATIC ET 200SP and SIMATIC ET 200SP HA distributed I/O systems. Based on an 11 mm width per station, this pre-assembled valve block configuration provides 12 valve slots with bottom-oriented D6 mm push-in working connections and G 1/4 pneumatic supply and exhaust connections. The unit operates within a nominal pressure range of 2.5 bar to 10.0 bar and a medium temperature span of 0 °C to +50 °C, using dried, oil-free or lubricated compressed air filtered to 5 µm in accordance with ISO 8573-1:2010 Class 7.4.4. Built to Revision 2 (REV.2) mechanical standards, Burkert 20075853 features integrated pneumatic HotSwap check valves in channel 1 (P) for replacement of individual valves while pressurized, alongside integrated non-return check valves in exhaust channels 3 (R) and 5 (S) to prevent spurious actuator switching caused by exhaust line pressure spikes.

System Architecture and Siemens I/O Integration

Burkert Type 8647 operates as an integral component of the Siemens distributed peripheral system. The valve block connects mechanically and electrically to the standard rail and interfaces directly with the backplane bus of the SIMATIC ET 200SP or SIMATIC ET 200SP HA interface modules (IM 155-6 PN or IM 155-6 DP). Process, configuration, and diagnostic data are transferred cyclically via PROFINET IO or PROFIBUS DP without requiring discrete point-to-point field wiring between the PLC output cards and pilot solenoid coils.

+-----------------------------------------------------------------------------------------+ | Siemens SIMATIC ET 200SP / ET 200SP HA | | +----------------+ +-----------------+ +------------------------------------------+ | | | Interface Mod. | | Siemens I/O | | Burkert Type 8647 AirLINE SP (20075853) | | | | (IM 155-6 PN) | | BaseUnits | | +--------+ +--------------+ +----------+ | | | | | | (Power Supply) | | | PSU-L | | 12x Valve | | PSU-R | | | | | | | BU...D / BU...D/T| | (G 1/4) | | Slots (11mm) | | (G 1/4) | | | | +-------+--------+ +--------+--------+ +----+---+ +-------+------+ +----+-----+ | | +----------|--------------------|----------------|-------------|-------------|------------+ | | | | | +== Backplane Bus ===+================+=============+=============+

Software integration is supported through multiple configuration options:

• Siemens TIA Portal: Configuration via Hardware Support Package (HSP0225 from TIA Portal V14 SP1) or PROFINET GSDML file.
• SIMATIC STEP 7 Classic: Configuration via HSP2105 (STEP 7 V5.5 SP4 or higher) or standard PROFIBUS GSD file.
• SIMATIC PCS 7: Full integration via Hardware Update Package (HUP from PCS 7 V9.0 SP2) for both standard and high-availability ET 200SP HA setups.

Station Configuration Limits

Specification	ET 200SP Station	ET 200SP HA Station
Maximum modules per island	64 modules (I/O modules + valve units)	56 modules (I/O modules + valve units)
Multiple valve blocks per station	Yes (requires new BaseUnit power feed)	No (maximum 1 valve block per station)
Valve block position on station	Flexible; Siemens I/O modules allowed to the right	Rightmost position only; no I/O modules to the right
BaseUnit upstream of valve block	Recommended (BU...D or BU...D/T)	Mandatory (BU...D or BU...D/T with cover)
AirLINE Quick base adaptation	Permitted (subject to baseplate sizing)	Not supported by design

Technical Specifications of 20075853

Parameter	Technical Specification
Article number	20075853
Model designation	Valve island 8647 11 mm 12-bank
Width per station	11 mm per valve position
Total valve slots	12 valve slots
Hardware generation	Revision 2 (REV.2)
Valve population	Mixed valve population (3/2-way function)
Supply connection (1/P)	G 1/4 female thread
Exhaust connections (3/R, 5/S)	G 1/4 female thread
Working connection (2/A, 4/B) size	D6 mm push-in coupling
Working connection orientation	Bottom face of pneumatic base module
Operating pressure range	2.5 bar to 10.0 bar (gauge pressure)
Medium temperature	0 °C to +50 °C
Ambient operating temperature	0 °C to +55 °C
Storage temperature	-20 °C to +60 °C
Permissible relative humidity	75% average, 85% occasional, non-condensing
Operating medium	Dry compressed air, neutral gases, lubricated or non-lubricated (ISO 8573-1:2010 Class 7.4.4, 5 µm filter)
Integrated P HotSwap function	Yes (check valve in port 1 of pneumatic base module)
Integrated exhaust check valves	Yes (ports 3/R and 5/S)
Nominal flow rate QNn (air)	300 l/min (reduced by approx. 20% with active P shut-off)
Operating voltage	24 V DC (±10%, residual ripple max 2.4 Vss, SELV/PELV)
Power consumption per single valve	0.8 W (continuous operation, 100% ED)
Power consumption per double valve	2 × 0.8 W (with integrated power reduction)
Degree of protection	IP20 (according to EN 60529); up to IP65 in sealed enclosure
Mounting arrangement	DIN rail (standard mounting rail, horizontal or vertical)

Revision 2 (REV.2) Design Features

Burkert Type 8647 Revision 2 introduces optimized fluidic geometries and standardized mechanical interfaces across both base units and plug-in solenoid valves. The distinguishing features between REV.1 and REV.2 include:

• Working connection layout: REV.2 features an alternating wavy channel arrangement for ports 2 (A) and 4 (B), contrasting with the linear parallel pattern on REV.1.
• Hose connector release rings: REV.2 utilizes blue release rings on all push-in fittings; REV.1 uses black rings.
• HotSwap flow restriction: REV.2 reduces flow loss during active P shut-off to approximately 20%, compared to up to 50% restriction on REV.1 bases.
• Standardized valve flange profile: Single valves (3/2-way and 5/2-way) and double valves (2×3/2-way) in REV.2 share a unified FM20 pneumatic flange profile. Mechanical coding on the valve housing prevents incompatible REV.1 single valves (FM14) from being mounted to REV.2 base modules.
• Marking on type label: Assemblies and modules are identified by the explicit designation "Rev.2" on their respective identification labels.

Flange Interface Compatibility

Single valves Type 6524 and Type 6525 designed for REV.1 (FM14 interface) and REV.2 (FM20 interface) cannot be interchanged. Always install REV.2 replacement valves on REV.2 base units.

Compatible Solenoid Pilot Valves and Circuit Functions

Burkert Type 8647 accommodates high-response pilot solenoid valves built with flipper armature technology (Type 6144) acting on pneumatic seat valves. These valves deliver switching times of 15 ms to 28 ms with low coil power consumption (0.8 W per coil).

Available Circuit Functions

• Circuit Function C (CF C): 3/2-way normally closed valve, servo-controlled, with manual override (or 2×3/2-way configuration within an 11 mm width).
• Circuit Function D (CF D): 3/2-way normally open valve, servo-controlled, with manual override.
• Circuit Function H (CF H): 5/2-way valve, servo-controlled, with manual override.
• Circuit Function L (CF L): 5/3-way valve (Type 0460 spool valve), middle position locked.
• Circuit Function N (CF N): 5/3-way valve (Type 0460 spool valve), middle position exhausted.
• Circuit Function Z (CF Z): 5/2-way bistable impulse valve (Type 0460 spool valve) with dual coils.

Pilot Valve Specifications for REV.2

Valve Type	Circuit Function	Orifice [mm]	Flow Rate QNn [l/min]	Pressure Range [bar]	Opening Time [ms]	Closing Time [ms]	Article No. (REV.2)
6524	3/2 NC (CF C)	4.0	300	2.5 to 10	15	28	20029918
6524	3/2 NC (Aux Air)	4.0	300	1.0 to 10	15	20	20029921
6524	3/2 NC (Vacuum)	4.0	300	Vac to 7	15	20	20029923
6524	3/2 NO (CF D)	4.0	300	2.5 to 10	15	28	20029919
6525	5/2 (CF H)	4.0	300	2.5 to 10	20	28	20029920
6524	2× 3/2 NC (CF C)	4.0	300	2.5 to 10	12	20	204710
0460	5/3 Closed (CF L)	2.5	200	2.0 to 7	15	20	154184
0460	5/3 Exhaust (CF N)	2.5	200	2.0 to 7	15	20	154185
0460	5/2 Impulse (CF Z)	2.5	200	2.0 to 7	15	15	154183

Safety Shutdown Concepts (EVS, SIA, and F-PM-E)

Type 8647 incorporates dedicated hardware architectures to satisfy diverse functional safety and plant trip requirements:

1. External Valve Shutdown (EVS)

Electronic base modules designated with "EVS" incorporate a pluggable 2-pole screw-type terminal on the top face. Opening this circuit produces an immediate single-pole disconnection of the 24 V DC load supply to all valves connected to that specific base module. The module logic, communication bus, and LC display remain active, reporting "EVS active" to the host controller.

• Terminal wire cross-section: 0.14 mm² to 1.5 mm² (AWG 28 to 16).
• Required contact rating: 1.5 A / 24 V DC potential-free contact (e.g., from an RQ or F-RQ relay module).
• Wiring restriction: Maximum line length of 2 m within the same control cabinet enclosure.

2. Safety Individual Actuation (SIA)

SIA variants of Type 6524 and Type 6525 valves are manufactured without manual overrides and feature an independent secondary wire harness with flying leads. This allows dedicated single-channel safety tripping by an external safety relay, independent of adjacent valves.

3. Fail-Safe Power Module (Siemens F-PM-E)

For architected safety control conforming to EN ISO 13849-1 and IEC 62061, Type 8647 valve blocks can be positioned downstream of a Siemens F-PM-E 24VDC/8A PPM ST fail-safe power module. When safety shutdown occurs, the F-PM-E disconnects the load supply to the entire potential group, causing all 6524/6525 valves to return to their de-energized rest positions. Compatible REV.2 modules are marked with "FC".

F-PM-E Configuration Parameters

To avoid nuisance tripping during cyclical dark tests, set the following parameters on the Siemens F-PM-E module:

• Maximum readback time for dark test and switch-off test: 1.5 ms to 2.5 ms
• Maximum readback time for switch-on test: 0.8 ms

Installation and Pneumatic Connection

Mounting onto Standard Rails

The valve block is delivered fully assembled and mechanically latched. When installing on a 35 mm DIN rail (or ET 200SP HA profile rail), maintain a minimum top clearance of 5 cm to adjacent cable ducts or enclosure walls (8 cm when utilizing EVS pluggable terminals). Tighten the integrated fastening screws clockwise with a torque of approximately 1.8 Nm.

Pneumatic Ports and Tightening Torques

Connection	Marking	Function	Thread Size	Recommended Torque [Nm]	Max Torque [Nm]
Connection Unit Port 1	P / 1	Compressed air supply	G 1/4	4.0 to 7.0	20.0
Connection Unit Port 3/5	R / 3, S / 5	Common exhaust air	G 1/4	4.0 to 7.0	20.0
Connection Unit Port X	X	Auxiliary pilot air / Pilot exhaust	M5	1.0 to 1.2	3.0
Valve Working Ports	2 (A), 4 (B)	Actuator service lines	D6 push-in	Hand insertion	Hand insertion

ISO 14743 Push-In Tube Installation Guidelines

To ensure positive sealing and mechanical retention in D6 push-in fittings:

1. Use certified polyamide (PA) or polyurethane (PU) tubing meeting ISO 14743:2020 tolerance limits (PA 6 mm OD: ±0.08 mm; PU 6 mm OD: ±0.10 mm).
2. Cut tubing squarely with an approved tube cutter; avoid angular cuts or jagged edges.
3. Push the tube firmly past the internal release ring and stainless steel gripping collet into the internal stop.
4. Check that tensile extraction force complies with the standard minimum test values (120 N for PA 6 mm; 100 N for PU 6 mm). For soft PU tubing subjected to higher temperatures, insert support sleeves (ID 20099400).

Diagnostics, Commissioning, and Maintenance

Type 8647 incorporates multi-tier diagnostics presented via hardware LEDs, an alphanumeric/graphic LC display on each electronic base module, and cyclical fieldbus telegrams:

• PSU-L Connection Unit LED: Green "PWR OK" indicates correct 24 V DC supply voltage on the power bus.
• Electronic Base Module LEDs: "DIAG" LED (green flashing = unparameterized; red flashing = active diagnostic alarm; steady red = module fault); "PWR" LED (green = load voltage present).
• LC Display Status Indications: Graphic symbols display individual valve channel energization (0 to 7 or 0 to 15), actuator end-position feedback (open/closed when connected to digital input modules), and alternating diagnostic text (such as "Short Circuit Ch. x", "Wire Break Ch. x", "EVS active", or "PROFIenergy").
• Dual Switching Cycle Counters: Every channel maintains two independent 32-bit cycle registers in remanent memory—one for the pilot solenoid valve (DS 130) and one for the driven process actuator (DS 131). Warning thresholds can be parameterized to trigger preventive maintenance requests before mechanical wear leads to field failure.

HotSwap Valve Replacement Procedure

Thanks to the integrated P shut-off feature in model 20075853, individual valves can be replaced without depressurizing the main air supply manifold:

1. Loosen the two diagonal fastening screws on the valve using an appropriate screwdriver.
2. Withdraw the valve from the base module. The integrated P shut-off seal immediately closes port 1, releasing a brief functional air burst before sealing the channel to minimize residual leakage.
3. Inspect the mounting face and verify that new seals (FM20 profile seal) are properly seated in the replacement valve.
4. Position the replacement valve onto the 11 mm station guide pins and tighten the screws in diagonal pairs to 0.25–0.30 Nm.

Spare Parts and Accessories for REV.2

Item Description	Quantity / Scope	Article No.
Replacement Valve Type 6524 3/2-way NC (2.5–10 bar, 24 V DC, REV.2)	1 piece	20029918
Replacement Valve Type 6524 3/2-way NO (2.5–10 bar, 24 V DC, REV.2)	1 piece	20029919
Replacement Valve Type 6525 5/2-way (2.5–10 bar, 24 V DC, REV.2)	1 piece	20029920
Replacement Valve Type 6524 2× 3/2-way NC (2.5–10 bar, 24 V DC, REV.1/2)	1 piece	204710
Cover plate for vacant valve position (REV.2, 11 mm station)	1 piece	661092
Cover for unused electrical plug-in connection	1 piece	653670
Valve seal kit FM20 (for Type 6524 2×3/2-way & REV.2 valves)	12 seals	20016305
Valve seal kit FM24 (for Type 6524 3/2-way REV.2 single valves)	12 seals	20024336
Module seal kit MP16 (intermediate block gaskets for REV.2)	4 seals	20024339
Push-in tube connector D6 mm, nickel-plated brass	8 pieces	20024340
Push-in tube connector D6 mm, stainless steel 1.4401	8 pieces	20024341