BURKERT 20142855 (Type 8647 AirLINE SP) is a modular electropneumatic automation valve island developed for integration into Siemens SIMATIC ET 200SP and ET 200SP HA distributed I/O systems. As a Generation Revision 2 (REV.2) assembly, this article is configured as a 4-bank valve unit with an 11 mm width per station, equipped with a stainless steel AirLINE Quick adapter plate for direct control cabinet base mounting. Working ports are positioned at the bottom with D6 stainless steel push-in connectors, and pneumatic supply is provided via G 1/4 stainless steel threaded ports.

Specific Configuration of Article 20142855

Article 20142855 combines pneumatic base hardware and mechanical cabinet adaptation into a factory-assembled unit:

Specification Parameter	Value / Characteristic
Article Number	20142855
Type Family	8647 AirLINE SP
Hardware Revision	Revision 2 (REV.2)
Width per Station	11 mm
Number of Valve Stations	4-bank (accommodates up to 4 pilot valves)
Valve Population Type	Mixed valve population (3/2-way and 5/2-way)
Installation Interface	AirLINE Quick (ALQ VA)
Adapter Plate Material	Stainless steel 1.4301
Supply Port 1 (P)	G 1/4 (Stainless steel)
Exhaust Ports 3 (R), 5 (S)	G 1/4 (Stainless steel)
Working Ports 2 (A), 4 (B)	D6 push-in couplings (Stainless steel 1.4401, bottom exit)
Integrated Non-Return Valves	Yes, in exhaust ports 3 (R) and 5 (S)
Pneumatic HotSwap Function	Yes, integrated P-channel shut-off in supply port 1 (P)
Operating Pressure Range	2.5 bar to 10.0 bar
Medium Temperature Range	0 °C to +50 °C
Ambient Operating Temperature	0 °C to +55 °C
Degree of Protection	IP20 (IP65 in closed enclosure; UL Type 4X via AirLINE Quick)
Explosion Protection Marking	ATEX II 3 G Ex ec IIC T4 Gc / IECEx Ex ec IIC T4 Gc; II 2 G Ex eb IIC Gb / II 2 D Ex tb IIIC Db

AirLINE Quick Stainless Steel Floor Adaptation

Article 20142855 integrates the AirLINE Quick adapter plate manufactured from stainless steel 1.4301. This configuration allows the entire valve block to mount directly over a cutout in the control cabinet base or cabinet wall, replacing bulkhead feedthroughs and extensive internal tubing.

Pneumatic working ports exit downward through the cabinet cutout via D6 stainless steel 1.4401 push-in fittings. Supply and exhaust ports (G 1/4) route through the same stainless steel plate. This architecture reduces required internal control cabinet volume and shortens installation time.

AirLINE Quick Cutout and Rail Support

When installed with AirLINE Quick, the device mounts to the control cabinet base via a solid metal plate and supports the standard DIN rail and attached Siemens modules. Standard rail overhang must not exceed 10 cm on either side of the valve block. AirLINE Quick cannot be combined with SIMATIC ET 200SP HA due to mechanical base differences.

Revision 2 (REV.2) Features and Flange Interface

Article 20142855 belongs to the optimized REV.2 hardware generation. Pneumatic base modules, connection units, and single valve interfaces in REV.2 incorporate structural and fluidic improvements over REV.1.

Key identifying characteristics of REV.2 include:

1. Wavy Channel Arrangement: Working ports feature a staggered, wavy channel geometry on the pneumatic base instead of the parallel channel alignment of REV.1.
2. Blue Release Rings: Push-in hose release rings are colored blue (REV.1 used black release rings).
3. Reduced HotSwap Flow Restriction: The integrated P shut-off mechanism restricts nominal flow by only approximately 20% in REV.2, compared to up to 50% restriction in REV.1.
4. Unified FM20 Flange Profile: REV.2 standardizes pneumatic flange interfaces across single valves (Type 6524 3/2-way, Type 6525 5/2-way) and double valves (Type 6524 2x3/2-way) using the FM20 pattern. In REV.1, single valves used FM14 interfaces while double valves used FM20.

Revision Compatibility Constraint

Single valves manufactured for REV.1 and REV.2 are mechanically and pneumatically incompatible. Replacement single valves on Article 20142855 must strictly be REV.2 valves with FM20 flange interfaces.

Siemens SIMATIC ET 200SP System Architecture

Type 8647 connects directly to the backplane bus of the Siemens SIMATIC ET 200SP system, eliminating external point-to-point fieldbus wiring between pneumatic pilot valves and digital output cards.

Integration Aspect	SIMATIC ET 200SP	SIMATIC ET 200SP HA
Configuration with GSDML (PROFINET IO)	Yes	Yes
Configuration with GSD (PROFIBUS DP)	Yes	No
STEP 7 Classic Integration	Yes (via HSP2105)	No
STEP 7 TIA Portal Integration	Yes (via HSP0225)	No
PCS 7 Integration (V9.0 SP2 or higher)	Yes (via HUP)	Yes (via HUP)
Multiple Valve Blocks per Station	Yes (requires new power supply)	No (maximum 1 valve block)
BaseUnit Immediately Upstream (Left)	Recommended (light-colored BU)	Mandatory (light-colored BU)
Further Modules Downstream (Right)	Yes (requires light-colored BU)	No
AirLINE Quick Compatibility	Yes	No

Electrical load voltage is distributed across the BaseUnit power bus at 24 V DC (±10%). When planning the power supply, install a light-colored BaseUnit (type BU...D or BU...D/T) directly to the left of the valve block to isolate the valve block supply from other peripheral modules.

Technical and Operating Limits

Technical Parameter	Supported Operating Specification
Operating Voltage	24 V DC (±10% permissible tolerance, SELV/PELV)
Residual Ripple	Max. 2.4 Vss
Power Consumption per Valve	0.8 W (single valve); 2 x 0.8 W with power reduction (2x3/2-way)
Switching Time (ISO 12238)	Opening: 12 to 20 ms; Closing: 20 to 28 ms (Type 6524/6525)
Nominal Operating Mode	Continuous operation (100% duty cycle ED)
Operating Medium	Dry compressed air, neutral gases, lubricated or unlubricated
Compressed Air Purity	ISO 8573-1:2010 Class 7.4.4 (particle size max. 5 μm)
Medium Temperature Range	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% occasionally (non-condensing)
Atmospheric Pressure Range	80 kPa to 106 kPa (max. 2000 m above sea level for UL/safety versions)
Electrical Protection Class	Class 3 (DIN EN 61140, VDE 0140); functional grounding via DIN rail required

Compatible Pilot Valve Population

Article 20142855 features 4 valve slots designed for mixed valve population using 11 mm wide pilot valves:

• Type 6524 (3/2-way): Monostable pilot flipper solenoid valve Type 6144 combined with a pneumatic seat valve amplifier. Available in Circuit Function C (normally closed) and Circuit Function D (normally open).
• Type 6524 (2x3/2-way): Integrates two independent 3/2-way valves on an 11 mm station width, maximizing density for single-acting actuators.
• Type 6525 (5/2-way): Monostable flipper pilot valve and pneumatic seat amplifier for double-acting actuators in Circuit Function H.
• Manual Overrides: Standard pilot valves include manual overrides operable via push (momentary) and rotate (detent) actuation.

Type 0460 Incompatibility

Type 0460 impulse slide valves cannot be mounted on valve blocks equipped with AirLINE Quick due to physical dimensional constraints.

Safety Functions, HotSwap, and Protection

Article 20142855 is configured with integrated safety and maintenance mechanisms:

• Pneumatic HotSwap (P Shut-Off): The pneumatic base module incorporates a spring-loaded mechanical shut-off in port 1 (P). A pilot valve can be unscrewed and replaced while the main air supply remains pressurized at up to 10 bar. When removing a valve, check valves automatically close the supply passage with minimal residual venting, preventing system-wide pressure collapse.
• Integrated Check Valves: Non-return check valves integrated into exhaust channels 3 (R) and 5 (S) prevent back-pressure from propagating through common exhaust headers to unintended actuator movements during emergency exhaust cycles.
• External Valve Shutdown (EVS): Electronic base modules with EVS provide a 2-pole pluggable screw terminal (cross-section 0.14 to 1.5 mm², AWG 28 to 16). Opening this potential-free contact disconnects load voltage to all valves on that module while keeping backplane communication, bus diagnostics, and LCD status displays active.
• Siemens F-PM-E Power Module: For functional safety integration, Type 8647 modules marked "FC" and Type 6524/6525 valves can operate within the potential group of a Siemens F-PM-E 24VDC/8A PPM ST fail-safe power module.

ATEX HotSwap Restriction

The pneumatic HotSwap function of individual valves cannot be utilized in hazardous areas under ATEX/IECEx certification. Always de-energize and depressurize the system prior to valve maintenance in potentially explosive atmospheres.

Mechanical Dimensions and Clearances

When installing the valve island on a standard rail inside an enclosure, observe the following physical guidelines:

• Upper Clearance: Maintain a minimum vertical distance of 5 cm between the upper edge of the valve block and adjacent equipment or enclosure walls (minimum 8 cm for modules with EVS) to allow heat dissipation and tool access.
• AirLINE Quick Cutout: Prepare a burr-free opening in the control cabinet base conforming to the AirLINE Quick 4-bank template. Ensure the elastomeric seal is undamaged and seated in the perimeter groove.
• Base Stability Plate: Fasten the external AirLINE Quick stability plate using M5x10 screws tightened to 2.0 Nm.

Connection Port Torques and Push-In Assembly

Observe specified tightening torques when securing pneumatic connections to the valve island:

Port Identification	Thread / Fitting Size	Recommended Torque	Maximum Permissible Torque
Supply Port 1 (P), Exhaust 3/5 (R/S)	G 1/4	4.0 to 7.0 Nm	20.0 Nm
Auxiliary Pilot Air (X)	M5	1.0 to 1.2 Nm	3.0 Nm
AirLINE Quick Push-In Fitting	M7	1.75 to 2.25 Nm	4.0 Nm
External Stability Plate Screws	M5x10	2.0 Nm	2.5 Nm
Valve Retaining Screws (Type 6524/6525)	M2x20 / M2x28	0.25 to 0.3 Nm	0.35 Nm

Tubing Assembly per ISO 14743:2020

Pneumatic tubing must be cut square using dedicated hose cutters. When inserting into the D6 stainless steel push-in couplings, push firmly until the tubing seats past the internal O-ring into the gripping claws. Polyamide (PA) tubing requires a minimum pull-off holding force of 120 N; polyurethane (PU) tubing requires a minimum of 100 N. For flexible PU tubing, internal support sleeves (ID 20099400) are recommended.

Compatible Replacement Valves and Spare Components (REV.2)

For Article 20142855, spare pilot valves and module components must strictly match REV.2 specifications:

Position / Component	Description	Ordering Article No.
Pilot Valve	Type 6524 3/2-way NC (Circuit Function C), 2.5–10 bar, 24 V DC, manual override, REV.2	20029918
Pilot Valve	Type 6524 3/2-way NO (Circuit Function D), 2.5–10 bar, 24 V DC, manual override, REV.2	20029919
Pilot Valve	Type 6525 5/2-way (Circuit Function H), 2.5–10 bar, 24 V DC, manual override, REV.2	20029920
Pilot Valve	Type 6524 2x3/2-way NC (Circuit Function C), 2.5–10 bar, 24 V DC, manual override, REV.2	204710
Pilot Valve (SIA)	Type 6524 3/2-way NC, without manual override, flying leads, 2.5–10 bar, REV.2	20029924
Pilot Valve (SIA)	Type 6525 5/2-way, without manual override, flying leads, 2.5–10 bar, REV.2	20029925
Blanking Cover	Cover plate for unused valve slot (Type 6524/6525 REV.2)	661092
Electrical Cover	Blanking cover for electrical connector on base module	653670
Blind Plate	AirLINE Quick blind plate, 4-fold	20057391
Valve Gasket Kit	Replacement valve seals FM20 for Type 6524 2x3/2-way & single valves (12 pcs)	20016305
Valve Gasket Kit	Replacement valve seals FM24 for Type 6524 single valves (12 pcs)	20024336
Module Gasket Kit	Replacement module seals MP16 (4 pcs)	20024339
Push-In Coupling	D6 stainless steel replacement cartridge fitting (8 pcs)	20024341