LGN Control & Indication Units - Part 1
Hygienic Valve Automation

Control & Indication Units

ThinkTop control units combine valve actuation control, position sensing and clear 360° status indication in one hygienic automation platform. The ThinkTop V20, V50 and V70 series support reliable operation, faster commissioning and modern plant connectivity.

Explore the System ThinkTop Models OEM Part Numbers Request a Quotation
ThinkTop Series V20 · V50 · V70
ThinkTop
V20
V20
ThinkTop
V50
V50
ThinkTop
V70
V70
360° LED feedback Clear local status indication from any viewing angle.
Automatic setup Fast commissioning and valve recognition on V50 and V70.
Modern interfaces Digital PNP, IO-Link and AS-Interface options.
Hygienic applications Designed for food, dairy, beverage, pharma and biotech plants.

How a ThinkTop control unit works

The unit is mounted directly on the valve actuator and creates a compact connection between the automation system, pneumatic actuation and real-time valve-position feedback.

Integrated control and feedback

  • Receives commands from the PLC or process-control system.
  • Operates integrated solenoid valves for pneumatic actuation.
  • Detects open, closed and intermediate valve positions.
  • Communicates status through Digital, IO-Link or AS-i interfaces.
  • Provides highly visible 360° LED indication for operators.
  • Supports efficient troubleshooting, maintenance and retrofit projects.
PLC / DCS Control command Digital · IO-Link · AS-i Signal ThinkTop Control & indication 360° LED · Sensors · Solenoids Pneumatic actuation Hygienic Valve Valve-position feedback

ThinkTop product family

The three main platforms cover indication-focused retrofits, standard automated valves and more advanced actuator or CIP configurations.

ThinkTop V20 Compact, cost-effective indication and retrofit solution. ThinkTop V50 Automatic setup and recognition for standard automated valves. ThinkTop V70 Advanced configurations and Burst Seat Clean functionality. Interfaces Digital PNP, IO-Link, AS-i v2.1 and AS-i v3.0. Valve Compatibility Selection guidance for hygienic valves and actuator types. V50 OEM Tables Complete categorized configuration and part-number reference. V70 OEM Tables Complete IO-Link, Digital and AS-i configuration catalogue. Selection & RFQ Engineering checklist, FAQ and quotation requirements.
LGN Control & Indication - Part 2

ThinkTop Model Comparison

The ThinkTop family covers three different automation levels for hygienic valves. Selection depends on the required automation interface, actuator configuration and CIP functionality.

ThinkTop V20

Economical indication unit

  • 360° LED indication
  • Digital, IO-Link or AS-i
  • ±1 mm position accuracy
  • Excellent retrofit solution
  • Compact hygienic housing
ThinkTop V50

Standard automation platform

  • Automatic setup
  • Automatic valve recognition
  • Digital / IO-Link / AS-i
  • Fast commissioning
  • Interchangeable with previous ThinkTop generations
ThinkTop V70

Advanced control platform

  • Burst Seat Clean
  • Advanced actuator support
  • Multiple solenoid configurations
  • Highest automation flexibility
  • Optimized CIP performance

Engineering Comparison

Feature V20 V50 V70
Primary purposeIndicationControl + FeedbackAdvanced Control
Automatic setup—✓✓
Automatic valve recognition—✓✓
Burst Seat Clean——✓
360° LED indication✓✓✓
Digital PNP✓✓✓
IO-Link✓✓✓
AS-iV3.0V2.1 / V3.0V2.1 / V3.0
Typical applicationRetrofitGeneral hygienic valvesHigh-end automated plants
LGN Control & Indication Units - Part 3

ThinkTop V50 — OEM Configuration Table

Complete reference table for ThinkTop V50 IO-Link, Digital PNP, AS-Interface v2.1 and AS-Interface v3.0 configurations. Model groups are separated by color and strong divider lines for faster technical review.

ThinkTop V50 OEM catalogue

Verify the electrical connection, solenoid quantity, pneumatic connection and valve type before requesting a quotation.

21 OEM references
IO-Link Digital PNP AS-i v2.1 AS-i v3.0
Interface Description Denomination El. Connection Solenoids Air Connection Valve Type OEM Part No.
IO-Link Configurations
IO-Link Supply control board: 24 VDC ThinkTop V50 IO-Link M12 0 – – 6-9615 40 0419
IO-Link Supply control board: 24 VDC ThinkTop V50 IO-Link 3/2 M12 1 6mm 3/2 6-9615 40 0420
IO-Link Supply control board: 24 VDC ThinkTop V50 IO-Link 3/2 M12 1 1/4" 3/2 6-9615 40 0421
Digital PNP Configurations
Digital PNP Supply control board: 24 VDC ThinkTop V50 PNP Gland 0 – – 6-9615 40 0401
Digital PNP Supply control board: 24 VDC ThinkTop V50 PNP 3/2 Gland 1 6mm 3/2 6-9615 40 0403
Digital PNP Supply control board: 24 VDC ThinkTop V50 PNP 3/2 Gland 1 1/4" 3/2 6-9615 40 0405
Digital PNP Supply control board: 24 VDC ThinkTop V50 PNP M12 0 – – 6-9615 40 0402
Digital PNP Supply control board: 24 VDC ThinkTop V50 PNP 3/2 M12 1 6mm 3/2 6-9615 40 0404
Digital PNP Supply control board: 24 VDC ThinkTop V50 PNP 3/2 M12 1 1/4" 3/2 6-9615 40 0406
AS-Interface v2.1 / 31-Node Configurations
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv2.1 Gland 0 – – 6-9615 40 0407
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv2.1 3/2 Gland 1 6mm 3/2 6-9615 40 0409
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv2.1 3/2 Gland 1 1/4" 3/2 6-9615 40 0411
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv2.1 M12 0 – – 6-9615 40 0408
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv2.1 3/2 M12 1 6mm 3/2 6-9615 40 0410
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv2.1 3/2 M12 1 1/4" 3/2 6-9615 40 0412
AS-Interface v3.0 / 62-Node Configurations
AS-i v3.0 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv3.0 Gland 0 – – 6-9615 40 0413
AS-i v3.0 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv3.0 3/2 Gland 1 6mm 3/2 6-9615 40 0415
AS-i v3.0 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv3.0 3/2 Gland 1 1/4" 3/2 6-9615 40 0417
AS-i v3.0 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv3.0 M12 0 – – 6-9615 40 0414
AS-i v3.0 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv3.0 3/2 M12 1 6mm 3/2 6-9615 40 0416
AS-i v3.0 Supply control board: 29.5–31.6 VDC ThinkTop V50 AS-iv3.0 3/2 M12 1 1/4" 3/2 6-9615 40 0418
Selection note: The OEM part number must be matched with the required interface, electrical connection, solenoid quantity, air connection and valve type. For retrofit projects, also provide the existing ThinkTop or indication-unit model and photographs of the actuator connection.
LGN Control & Indication Units - Part 4

ThinkTop V70 — IO-Link & AS-i v2.1 OEM Configurations

Complete OEM reference table for ThinkTop V70 IO-Link and AS-Interface v2.1 configurations, including M12 and gland electrical connections, 6 mm and 1/4-inch air connections, and 3/2 or 5/2 pneumatic valve arrangements.

ThinkTop V70 — advanced automation options

These configurations support more complex actuator arrangements and multiple solenoid combinations. Check every field carefully before quotation or retrofit selection.

27 OEM references
IO-Link AS-i v2.1
Interface Description Denomination El. Connection Solenoids Air Connection Valve Type OEM Part No.
IO-Link Configurations
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link M12 0 – – 6-9615 40 0301
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link 3/2 M12 1 6mm 3/2 6-9615 40 0302
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link 3/2 M12 2 6mm 3/2 6-9615 40 0304
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link 3/2 M12 3 6mm 3/2 6-9615 40 0306
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link 5/2 M12 1 6mm 5/2 6-9615 40 0308
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link 3/2 M12 1 1/4" 3/2 6-9615 40 0303
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link 3/2 M12 2 1/4" 3/2 6-9615 40 0305
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link 3/2 M12 3 1/4" 3/2 6-9615 40 0307
IO-Link Supply control board: 24 VDC ThinkTop V70 IO-Link 5/2 M12 1 1/4" 5/2 6-9615 40 0309
AS-Interface v2.1 / 31-Node Configurations
Cable Gland Electrical Connection
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 Gland 0 – – 6-9615 40 0101
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 Gland 1 6mm 3/2 6-9615 40 0103
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 Gland 2 6mm 3/2 6-9615 40 0107
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 Gland 3 6mm 3/2 6-9615 40 0111
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 5/2 Gland 1 6mm 5/2 6-9615 40 0115
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 Gland 1 1/4" 3/2 6-9615 40 0105
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 Gland 2 1/4" 3/2 6-9615 40 0109
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 Gland 3 1/4" 3/2 6-9615 40 0113
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 5/2 Gland 1 1/4" 5/2 6-9615 40 0117
M12 Electrical Connection
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 M12 0 – – 6-9615 40 0102
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 M12 1 6mm 3/2 6-9615 40 0104
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 M12 2 6mm 3/2 6-9615 40 0108
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 M12 3 6mm 3/2 6-9615 40 0112
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 5/2 M12 1 6mm 5/2 6-9615 40 0116
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 M12 1 1/4" 3/2 6-9615 40 0106
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 M12 2 1/4" 3/2 6-9615 40 0110
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 3/2 M12 3 1/4" 3/2 6-9615 40 0114
AS-i v2.1 Supply control board: 29.5–31.6 VDC ThinkTop V70 AS-iv2.1 5/2 M12 1 1/4" 5/2 6-9615 40 0118
Technical note: For zero-solenoid configurations, the air-connection and valve-type fields are shown as dashes. The 5/2 denomination rows have also been aligned with the 5/2 valve-type designation.
LGN OEM Reference Catalogue

ThinkTop® V70 Digital PNP & AS-Interface v3.0

A structured OEM ordering reference for hygienic valve automation, covering Digital PNP and AS-i v3.0 (62-node) variants with cable-gland and M12 electrical entries, up to three solenoid valves, and Ø6 mm or 1/4" pneumatic connections.

Digital PNP · 24 VDC AS-i v3.0 · 62 Node 0–3 Solenoids 3/2 & 5/2

ThinkTop V70 Platform

ThinkTop V70 integrates valve position sensing, pneumatic actuation and visible status indication in one hygienic control head. It is intended for single-seat, mixproof, long-stroke, Air/Air and two-step valve actuator configurations used in food, dairy, beverage and biopharmaceutical processing.

How to Use This Catalogue

Select the communication type first, then the electrical main entry, number of solenoid valves, pneumatic fitting size and solenoid function. The OEM item number in the first column identifies the complete ordered configuration.

Automatic SetupFast valve recognition and commissioning through guided setup routines.
360° IndicationHighly visible status feedback around the complete control-head circumference.
Flexible PneumaticsVariants with zero, one, two or three solenoids and two fitting standards.
Hygienic DutyDesigned for demanding wash-down conditions in sanitary process installations.

ThinkTop V70 Digital PNP

Supply control board: 24 VDC · Product codes 5428 and 5429

18 OEM CONFIGURATIONS
Product code 5428 · Main entry: Cable gland
OEM Item No.Supply Control BoardMain EntrySolenoid ValvesAir Hose ConnectionSolenoid Type
961540000124 VDCCable gland0——
961540000324 VDCCable gland1Ø6 mm3/2
961540000724 VDCCable gland2Ø6 mm3/2
961540001124 VDCCable gland3Ø6 mm3/2
961540001524 VDCCable gland1Ø6 mm5/2
961540000524 VDCCable gland11/4"3/2
961540000924 VDCCable gland21/4"3/2
961540001324 VDCCable gland31/4"3/2
961540001724 VDCCable gland11/4"5/2
Product code 5429 · Main entry: M12 plug
OEM Item No.Supply Control BoardMain EntrySolenoid ValvesAir Hose ConnectionSolenoid Type
961540000224 VDCM12 plug0——
961540000424 VDCM12 plug1Ø6 mm3/2
961540000824 VDCM12 plug2Ø6 mm3/2
961540001224 VDCM12 plug3Ø6 mm3/2
961540001624 VDCM12 plug1Ø6 mm5/2
961540000624 VDCM12 plug11/4"3/2
961540001024 VDCM12 plug21/4"3/2
961540001424 VDCM12 plug31/4"3/2
961540001824 VDCM12 plug11/4"5/2

ThinkTop V70 AS-Interface v3.0 · 62 Node

Supply control board: 29.5–31.6 VDC · Product codes 5432 and 5433

18 OEM CONFIGURATIONS
Product code 5432 · Main entry: Cable gland
OEM Item No.Supply Control BoardMain EntrySolenoid ValvesAir Hose ConnectionSolenoid Type
961540020129.5–31.6 VDCCable gland0——
961540020329.5–31.6 VDCCable gland1Ø6 mm3/2
961540020729.5–31.6 VDCCable gland2Ø6 mm3/2
961540021129.5–31.6 VDCCable gland3Ø6 mm3/2
961540021529.5–31.6 VDCCable gland1Ø6 mm5/2
961540020529.5–31.6 VDCCable gland11/4"3/2
961540020929.5–31.6 VDCCable gland21/4"3/2
961540021329.5–31.6 VDCCable gland31/4"3/2
961540021729.5–31.6 VDCCable gland11/4"5/2
Product code 5433 · Main entry: M12 plug
OEM Item No.Supply Control BoardMain EntrySolenoid ValvesAir Hose ConnectionSolenoid Type
961540020229.5–31.6 VDCM12 plug0——
961540020429.5–31.6 VDCM12 plug1Ø6 mm3/2
961540020829.5–31.6 VDCM12 plug2Ø6 mm3/2
961540021229.5–31.6 VDCM12 plug3Ø6 mm3/2
961540021629.5–31.6 VDCM12 plug1Ø6 mm5/2
961540020629.5–31.6 VDCM12 plug11/4"3/2
961540021029.5–31.6 VDCM12 plug21/4"3/2
961540021429.5–31.6 VDCM12 plug31/4"3/2
961540021829.5–31.6 VDCM12 plug11/4"5/2

Configuration Selection Logic

1CommunicationChoose Digital PNP or AS-Interface v3.0, 62 node.
2Main EntrySelect cable gland or M12 plug according to field wiring.
3SolenoidsSelect zero, one, two or three valves according to actuator duties.
4PneumaticsConfirm Ø6 mm or 1/4" fitting and 3/2 or 5/2 function.
Valve Application Range

Ordering leaflet coverage includes Unique SSV, i-SSV, SSSV, LKLA-T, SMP-BC, DV-ST, Shutter, SBV, Unique Mixproof, long-stroke valves, Air/Air and two-step actuators, except special LKLA variants.

Ordering Verification

Before purchase, verify communication protocol, electrical entry, actuator air logic, solenoid count and pneumatic connection against the installed valve and PLC architecture.

OEM reference note: Item numbers are reproduced as catalogue references for identification and configuration comparison. Alfa Laval and ThinkTop are trademarks of their respective owner. LGN recommends final technical verification before ordering.
LGN OEM Reference Catalogue

ThinkTop® V50 Digital PNP & AS-Interface

Compact hygienic valve sensing and control for butterfly, diaphragm, single-seat and double-seal valve applications, presented with complete OEM configuration references.

Digital 24 VDC PNP AS-i v2.1 · 31 Node AS-i v3.0 · 62 Node 0 or 1 Solenoid

ThinkTop V50 Platform

ThinkTop V50 combines valve position feedback, pneumatic actuation and visual status indication in a compact hygienic control head. The platform is designed for valves requiring zero or one solenoid valve, including butterfly, diaphragm and single-seat valve installations.

Catalogue Selection Logic

Select the communication interface first, then choose cable gland or M12 main entry, followed by the required solenoid quantity and pneumatic hose connection. OEM item numbers below must be matched to the complete configuration.

Auto Setup Fast commissioning with automatic valve-position recognition.
360° Status Highly visible indication supports rapid plant-floor diagnostics.
Compact Control Optimized for valves requiring no solenoid or one 3/2 solenoid.
Wash-down Ready Robust hygienic construction for demanding processing areas.

ThinkTop V50 Digital 24 VDC PNP

Conventional digital PLC interface with cable gland or M12 electrical entry.

OEM SERIES 9615400401–0406
OEM Part Number Supply / Interface Main Entry Solenoid Valves Air Hose Connection Solenoid Type
9615400401 24 VDC Digital PNP Cable gland 0 — —
9615400403 24 VDC Digital PNP Cable gland 1 Ø6 mm 3/2
9615400405 24 VDC Digital PNP Cable gland 1 1/4" 3/2
9615400402 24 VDC Digital PNP M12 plug 0 — —
9615400404 24 VDC Digital PNP M12 plug 1 Ø6 mm 3/2
9615400406 24 VDC Digital PNP M12 plug 1 1/4" 3/2

ThinkTop V50 AS-Interface v2.1 · 31 Node

AS-i network configuration for standard addressing, with cable gland or M12 entry.

OEM SERIES 9615400407–0412
OEM Part Number Interface Main Entry Solenoid Valves Air Hose Connection Solenoid Type
9615400407 AS-Interface v2.1 · 31 Node Cable gland 0 — —
9615400409 AS-Interface v2.1 · 31 Node Cable gland 1 Ø6 mm 3/2
9615400411 AS-Interface v2.1 · 31 Node Cable gland 1 1/4" 3/2
9615400408 AS-Interface v2.1 · 31 Node M12 plug 0 — —
9615400410 AS-Interface v2.1 · 31 Node M12 plug 1 Ø6 mm 3/2
9615400412 AS-Interface v2.1 · 31 Node M12 plug 1 1/4" 3/2

ThinkTop V50 AS-Interface v3.0 · 62 Node

Extended A/B addressing for networks supporting up to 62 nodes.

OEM SERIES 9615400413–0418
OEM Part Number Supply / Interface Main Entry Solenoid Valves Air Hose Connection Solenoid Type
9615400413 29.5–31.6 VDC · AS-i v3.0 Cable gland 0 — —
9615400415 29.5–31.6 VDC · AS-i v3.0 Cable gland 1 Ø6 mm 3/2
9615400417 29.5–31.6 VDC · AS-i v3.0 Cable gland 1 1/4" 3/2
9615400414 29.5–31.6 VDC · AS-i v3.0 M12 plug 0 — —
9615400416 29.5–31.6 VDC · AS-i v3.0 M12 plug 1 Ø6 mm 3/2
9615400418 29.5–31.6 VDC · AS-i v3.0 M12 plug 1 1/4" 3/2
V50 Application Range

Use ThinkTop V50 where the valve function requires zero or one solenoid. More complex valve functions requiring multiple solenoids generally belong to the ThinkTop V70 platform.

Configuration Verification

Before ordering, confirm communication protocol, electrical entry, hose standard, actuator arrangement and the required solenoid configuration against the installed valve.

OEM Selection Sequence

1 Choose Interface Digital PNP, AS-i v2.1 or AS-i v3.0.
2 Select Main Entry Cable gland or M12 plug.
3 Define Solenoid Zero or one integrated 3/2 solenoid.
4 Confirm Air Connection Ø6 mm or 1/4-inch hose connection.
OEM reference note: Item numbers are reproduced as catalogue references for identification and configuration comparison. Alfa Laval and ThinkTop are trademarks of their respective owner. LGN recommends final technical verification before ordering.
LGN OEM Reference Catalogue · Part 7

ThinkTop® Basic Digital 10–30 VDC PNP/NPN

Reliable hygienic valve sensing and pneumatic control with conventional digital PLC communication, available with zero to three solenoid valves and two pneumatic connection standards.

10–30 VDC PNP/NPN 0–3 Solenoids 3/2 or 5/2 Ø6 mm or 1/4"

ThinkTop Basic Digital Platform

ThinkTop Basic Digital integrates valve-position feedback, LED status indication and pneumatic actuation in one robust control head. Its conventional 10–30 VDC PNP/NPN sensor system provides straightforward connection to standard PLC installations.

OEM Configuration Logic

The complete item number is determined by the number of integrated solenoid valves, solenoid valve function and external air-tube connection. The exact OEM reference should always be matched to the installed valve and actuator arrangement.

Digital PLC Interface Compatible with standard 10–30 VDC PNP/NPN control architecture.
Modular Pneumatics Available with zero, one, two or three integrated solenoid valves.
Valve Position Feedback Continuous open and closed position indication for process supervision.
Hygienic Enclosure Designed for wash-down environments in food, dairy and beverage plants.

ThinkTop Basic Digital — Complete OEM Ordering Table

10–30 VDC PNP/NPN sensor system with 24 VDC solenoid supply.

OEM SERIES 96134198xx
OEM Part Number Sensor System Solenoids Solenoid Supply External Air Connection Solenoid Type
9613419801 10–30 VDC PNP/NPN 0 — — —
9613419802 10–30 VDC PNP/NPN 1 24 VDC Ø6 mm 3/2
9613419803 10–30 VDC PNP/NPN 2 24 VDC Ø6 mm 3/2
9613419804 10–30 VDC PNP/NPN 3 24 VDC Ø6 mm 3/2
9613419805 10–30 VDC PNP/NPN 1 24 VDC Ø6 mm 5/2
9613419852 10–30 VDC PNP/NPN 1 24 VDC 1/4" 3/2
9613419853 10–30 VDC PNP/NPN 2 24 VDC 1/4" 3/2
9613419854 10–30 VDC PNP/NPN 3 24 VDC 1/4" 3/2
9613419855 10–30 VDC PNP/NPN 1 24 VDC 1/4" 5/2

3/2 Solenoid Configurations

  • Used for standard spring-return pneumatic actuator functions.
  • Available with one, two or three integrated solenoids.
  • Choose Ø6 mm or 1/4-inch pneumatic tube connection.

5/2 Solenoid Configurations

  • Used where a double-acting pneumatic actuator requires alternating pressure outputs.
  • Catalogue configurations shown with one integrated 5/2 solenoid.
  • Available in both Ø6 mm and 1/4-inch connection versions.

OEM Selection Sequence

1 Verify Sensor Signal Confirm 10–30 VDC PNP/NPN digital PLC compatibility.
2 Count Solenoids Select zero, one, two or three integrated solenoid valves.
3 Choose Valve Function Select 3/2 or 5/2 pneumatic solenoid function.
4 Confirm Air Standard Match Ø6 mm or 1/4-inch external air-tube connection.
OEM reference note: Item numbers are reproduced exactly as catalogue identification references. Alfa Laval and ThinkTop are trademarks of their respective owner. Final compatibility should be confirmed against the valve type, actuator function, electrical architecture and pneumatic connection before ordering.
LGN OEM Reference Catalogue

ThinkTop® Basic AS-Interface v3.0 — 62 Node

Networked hygienic valve sensing and pneumatic control through AS-Interface v3.0, supporting up to 62 nodes and available with zero to three solenoid valves.

AS-Interface 29.5–31.6 VDC 0–3 Solenoids 3/2 or 5/2 Ø6 mm or 1/4"

ThinkTop Basic AS-Interface Platform

ThinkTop Basic AS-Interface integrates valve-position feedback, LED status indication, pneumatic actuation and fieldbus communication in one robust control head. The v3.0 architecture supports up to 62 addressable nodes on an AS-Interface network.

OEM Configuration Logic

The complete item number is determined by solenoid quantity, solenoid function and external air-tube connection. Every OEM reference below corresponds to one exact Alfa Laval catalogue configuration.

AS-Interface Network Two-wire fieldbus communication with 29.5–31.6 VDC supply and support for up to 62 nodes.
Modular Pneumatics Available with zero, one, two or three integrated solenoid valves.
Valve Position Feedback Continuous open and closed position indication for process supervision.
Hygienic Enclosure Designed for wash-down environments in food, dairy and beverage plants.

ThinkTop Basic AS-Interface v3.0 — Complete OEM Ordering Table

AS-Interface v3.0, 62-node communication with 29.5–31.6 VDC network supply.

OEM SERIES 96134844xx
OEM Part Number Communication / Supply Solenoids Solenoid Supply External Air Connection Solenoid Type
9613484401 AS-Interface 29.5–31.6 VDC 0 — — —
9613484402 AS-Interface 29.5–31.6 VDC 1 24 VDC Ø6 mm 3/2
9613484403 AS-Interface 29.5–31.6 VDC 2 24 VDC Ø6 mm 3/2
9613484404 AS-Interface 29.5–31.6 VDC 3 24 VDC Ø6 mm 3/2
9613484405 AS-Interface 29.5–31.6 VDC 1 24 VDC Ø6 mm 5/2
9613484452 AS-Interface 29.5–31.6 VDC 1 24 VDC 1/4" 3/2
9613484453 AS-Interface 29.5–31.6 VDC 2 24 VDC 1/4" 3/2
9613484454 AS-Interface 29.5–31.6 VDC 3 24 VDC 1/4" 3/2
9613484455 AS-Interface 29.5–31.6 VDC 1 24 VDC 1/4" 5/2

3/2 Solenoid Configurations

  • Used for standard spring-return pneumatic actuator functions.
  • Available with one, two or three integrated solenoids.
  • Choose Ø6 mm or 1/4-inch pneumatic tube connection.

5/2 Solenoid Configurations

  • Used where a double-acting pneumatic actuator requires alternating pressure outputs.
  • Catalogue configurations shown with one integrated 5/2 solenoid.
  • Available in both Ø6 mm and 1/4-inch connection versions.

OEM Selection Sequence

1 Verify Sensor Signal Confirm AS-Interface 29.5–31.6 VDC digital PLC compatibility.
2 Count Solenoids Select zero, one, two or three integrated solenoid valves.
3 Choose Valve Function Select 3/2 or 5/2 pneumatic solenoid function.
4 Confirm Air Standard Match Ø6 mm or 1/4-inch external air-tube connection.
OEM reference note: Item numbers are reproduced exactly as catalogue identification references for ThinkTop Basic AS-Interface v3.0 (62 node). Alfa Laval and ThinkTop are trademarks of their respective owner. Final compatibility should be confirmed against the valve type, actuator function, electrical architecture and pneumatic connection before ordering.
LGN OEM Reference Catalogue · Part 9

ThinkTop® Basic Intrinsically Safe

Explosion-safe hygienic valve sensing and pneumatic control for potentially hazardous processing areas, using NAMUR feedback sensors and low-voltage solenoid valves.

8 VDC NAMUR NC 0–3 Solenoids 3/2 or 5/2 Ø6 mm or 1/4"

ThinkTop Basic AS-Interface Platform

ThinkTop Basic AS-Interface integrates valve-position feedback, LED status indication, pneumatic actuation and fieldbus communication in one robust control head. The v3.0 architecture supports up to 62 addressable nodes on an AS-Interface network.

OEM Configuration Logic

The complete OEM item number is determined by the number of 12 VDC solenoid valves and the external pneumatic tube connection. Every reference below corresponds to one exact Alfa Laval catalogue configuration.

NAMUR Intrinsically Safe NAMUR NC feedback sensing designed for certified intrinsically safe circuits and hazardous processing zones.
Modular Pneumatics Available with zero, one or two integrated intrinsically safe 3/2 solenoid valves.
Valve Position Feedback Continuous open and closed position indication for process supervision.
Hygienic Enclosure Designed for wash-down environments in food, dairy and beverage plants.

ThinkTop Basic Intrinsically Safe — Complete OEM Ordering Table

8 VDC NAMUR NC sensor system with optional 12 VDC intrinsically safe 3/2 solenoid valves.

OEM SERIES 96134688xx
OEM Part Number Communication / Supply Solenoids Solenoid Supply External Air Connection Solenoid Type
9613468801 8 VDC NAMUR NC 0 — — —
9613468810 8 VDC NAMUR NC 1 12 VDC Ø6 mm 3/2
9613468811 8 VDC NAMUR NC 2 12 VDC Ø6 mm 3/2
9613468820 8 VDC NAMUR NC 1 12 VDC 1/4" 3/2
9613468821 8 VDC NAMUR NC 2 12 VDC 1/4" 3/2

3/2 Solenoid Configurations

  • Used for standard spring-return pneumatic actuator functions.
  • Available with one, two or three integrated solenoids.
  • Choose Ø6 mm or 1/4-inch pneumatic tube connection.

5/2 Solenoid Configurations

  • Used where a double-acting pneumatic actuator requires alternating pressure outputs.
  • Catalogue configurations shown with one integrated 5/2 solenoid.
  • Available in both Ø6 mm and 1/4-inch connection versions.

OEM Selection Sequence

1 Verify Sensor Signal Confirm 8 VDC NAMUR NC digital PLC compatibility.
2 Count Solenoids Select zero, one, two or three integrated solenoid valves.
3 Choose Valve Function Select 3/2 or 5/2 pneumatic solenoid function.
4 Confirm Air Standard Match Ø6 mm or 1/4-inch external air-tube connection.
OEM reference note: Item numbers are reproduced exactly as Alfa Laval catalogue identification references for ThinkTop Basic Intrinsically Safe. Alfa Laval and ThinkTop are trademarks of their respective owner. Final compatibility should be confirmed against the valve type, actuator function, electrical architecture and pneumatic connection before ordering.
LGN OEM Reference Catalogue · Part 10

IndiTop® Digital

Compact hygienic valve-position indication with dependable open and closed feedback for PLC monitoring, without integrated pneumatic solenoid control.

8 VDC NAMUR NC 0–3 Solenoids 3/2 or 5/2 Ø6 mm or 1/4"

ThinkTop Basic AS-Interface Platform

ThinkTop Basic AS-Interface integrates valve-position feedback, LED status indication, pneumatic actuation and fieldbus communication in one robust control head. The v3.0 architecture supports up to 62 addressable nodes on an AS-Interface network.

OEM Configuration Logic

The complete OEM item number is determined by cable length, connector style and PNP or NPN output configuration. Every reference below represents one exact Alfa Laval catalogue variant.

NAMUR Intrinsically Safe Independent open and closed feedback signals support accurate PLC monitoring.
Modular Pneumatics Suitable for a broad range of Alfa Laval air-actuated hygienic valves.
Valve Position Feedback Continuous open and closed position indication for process supervision.
Hygienic Enclosure Designed for wash-down environments in food, dairy and beverage plants.

IndiTop Digital — Complete OEM Ordering Table

8–30 VDC AC/DC sensor supply with two-position digital feedback.

OEM SERIES 961341810x
OEM Part Number Communication / Supply Solenoids Solenoid Supply External Cable / Connector Solenoid Type
9613418101 8–30 VDC/AC · PNP/NPN Fixed cable 5 m / 16.40 ft 2-position Valve open / closed indication
9613418102 8–30 VDC/AC · PNP/NPN Fixed cable 10 m / 32.80 ft 2-position Valve open / closed indication
9613418103 8–30 VDC/AC · NPN M12 plug incl. counterpart 0.5 m / 1.64 ft 2-position Valve open / closed indication
9613418104 8–30 VDC/AC · PNP M12 plug incl. counterpart 0.5 m / 1.64 ft 2-position Valve open / closed indication

3/2 Electrical Configurations

  • Used for standard spring-return pneumatic actuator functions.
  • Available with one, two or three integrated solenoids.
  • Choose Ø6 mm or 1/4-inch pneumatic tube connection.

5/2 Electrical Configurations

  • Used where a double-acting pneumatic actuator requires alternating pressure outputs.
  • Catalogue configurations shown with one integrated 5/2 solenoid.
  • Available in both Ø6 mm and 1/4-inch connection versions.

OEM Selection Sequence

1 Verify Sensor Signal Confirm 8 VDC NAMUR NC digital PLC compatibility.
2 Count Solenoids Select zero, one, two or three integrated solenoid valves.
3 Choose Valve Function Select 3/2 or 5/2 pneumatic solenoid function.
4 Confirm Air Standard Match Ø6 mm or 1/4-inch external air-tube connection.
OEM reference note: Item numbers are reproduced exactly as Alfa Laval catalogue identification references for IndiTop Digital. Alfa Laval and ThinkTop are trademarks of their respective owner. Final compatibility should be confirmed against the valve type, actuator function, electrical architecture and pneumatic connection before ordering.
LGN OEM Reference Catalogu

Final Engineering Reference, Service & Selection Guide

A practical closing section for selecting, installing, maintaining and ordering hygienic valve control and indication units across ThinkTop V70, V50, ThinkTop Basic and IndiTop platforms.

Selection Matrix Installation Logic Service Guidance SEO FAQ

1. Select the Correct Platform

Use the process requirement, actuator function and plant communication standard as the primary selection criteria.

ENGINEERING SEQUENCE
1

Define the Valve Function

Confirm whether the valve is single-seat, butterfly, mixproof, regulating or another air-actuated hygienic design.

2

Count Pneumatic Outputs

Determine whether zero, one, two or three solenoid functions are required and whether the actuator needs 3/2 or 5/2 control.

3

Confirm Communication

Select Digital PNP, AS-Interface, intrinsically safe NAMUR or feedback-only indication according to the plant PLC architecture.

4

Match Connections

Verify cable gland or M12 electrical entry and Ø6 mm or 1/4-inch pneumatic tube standards.

5

Check Environment

Review wash-down intensity, ambient conditions, hygienic zoning and any hazardous-area classification.

6

Confirm OEM Reference

Match the complete OEM item number to the exact communication, solenoid and connection configuration before ordering.

2. Platform Comparison Matrix

Quick comparison of the main control and indication families covered in Parts 5–10.

MODEL FAMILY GUIDE
Platform Primary Role Communication Typical Solenoid Capacity Best Fit Catalogue Coverage
ThinkTop V70 Advanced valve control and indication Digital PNP / AS-i v3.0 Complex multi-solenoid configurations Mixproof and demanding automated valves Part 5
ThinkTop V50 Compact valve control and indication Digital PNP / AS-i Zero or one solenoid Butterfly and single-seat valve duties Part 6
ThinkTop Basic Digital Conventional digital control 10–30 VDC PNP/NPN Zero to three solenoids Standard PLC installations Part 7
ThinkTop Basic AS-i Networked conventional control AS-Interface v3.0 Zero to three solenoids Distributed valve islands and fieldbus networks Part 8
ThinkTop Basic IS Hazardous-area control NAMUR intrinsically safe Limited low-power solenoid options ATEX-oriented hazardous processing zones Part 9
IndiTop Digital Feedback-only position indication PNP/NPN digital feedback No integrated solenoid control Applications requiring open/closed monitoring only Part 10

3. Installation & Signal Architecture

Typical relationship between the PLC, control unit and pneumatic valve actuator.

FUNCTIONAL SCHEMATIC
PLC / AS-i Master Sends commands and receives valve-status feedback.
→
Control or Indication Unit Sensors valve position and, where applicable, energizes solenoids.
→
Pneumatic Actuator & Valve Executes the required open, close, seat-lift or double-acting movement.

Electrical Installation Checks

  • Verify supply voltage and output logic before energizing the unit.
  • Confirm PNP, NPN, AS-i or NAMUR compatibility with the control system.
  • Use the specified cable entry, M12 pinout and grounding method.
  • Keep cable seals correctly tightened to maintain enclosure protection.

Pneumatic Installation Checks

  • Use clean, dry instrument air within the permitted pressure range.
  • Match Ø6 mm or 1/4-inch external tubing to the ordered configuration.
  • Check 3/2 versus 5/2 valve function before connecting actuator ports.
  • Inspect tubing for kinks, leaks and incorrect port allocation.

4. Service & Spare-Part Ordering Logic

For spare parts, exact identification of the installed unit is more reliable than selecting by visual appearance alone.

SERVICE REFERENCE

Identification Data

Record the complete control-head model, OEM item number, serial or production data, valve type and actuator arrangement.

Electrical Module

Specify the communication type, supply voltage, output logic and connector style before requesting sensors or control electronics.

Solenoid Module

Confirm the number of solenoids, 3/2 or 5/2 function, coil voltage and pneumatic connection standard.

Mechanical Components

Identify the cover, base, adapter, target stem, O-rings, seals and fittings by unit generation and valve family.

Service Kits

Use complete service kits when available rather than mixing seals and internal parts from different unit generations.

Photo Verification

Provide clear photos of the nameplate, internal module, connector side and valve mounting interface when the item number is unreadable.

Important OEM note: Internal spare-part numbers vary by control-head generation, electrical version, solenoid layout and revision level. To avoid publishing mismatched numbers, LGN confirms service parts against the installed unit data before quotation.

5. Troubleshooting Guide

Use these checks before replacing electronic or pneumatic components.

FIELD DIAGNOSTICS
Symptom Likely Cause Recommended Check Escalation
No LED indication Missing supply, incorrect polarity or wiring fault Measure supply voltage and verify connector pinout Check electronics only after wiring
Valve moves but feedback is wrong Incorrect setup, target position or sensor calibration Repeat setup and inspect actuator stroke and target stem Confirm valve type and stroke length
Solenoid clicks but valve does not move Insufficient air, blocked tubing or actuator fault Check air pressure, port assignment and tubing condition Inspect actuator seals and valve mechanics
Intermittent AS-i communication Network voltage drop, addressing or cable issue Check bus voltage, node address and cable integrity Review master diagnostics
Water ingress or corrosion Loose cover, damaged seal or incorrect cable gland Inspect enclosure seals and tightening condition Replace damaged sealing components
Repeated setup failure Valve stroke outside expected range or mechanical obstruction Operate the valve manually and inspect free movement Verify compatibility of control head and actuator

6. Frequently Asked Questions

Common engineering and purchasing questions for hygienic valve control and indication units.

FAQ
What is the difference between ThinkTop V50 and ThinkTop V70?
ThinkTop V50 is intended for simpler valve duties requiring zero or one solenoid, while ThinkTop V70 supports more complex valve functions and multi-solenoid configurations, including demanding mixproof-valve applications.
Can a Digital PNP control head replace an AS-Interface unit?
Not directly. The plant communication architecture, wiring, PLC inputs, network master and item configuration must all match. A change from AS-i to Digital PNP normally requires control-system and wiring modifications.
How do I choose between 3/2 and 5/2 solenoid functions?
A 3/2 solenoid is commonly used for spring-return actuators, while a 5/2 solenoid is typically used for double-acting actuator functions. The valve and actuator pneumatic diagram should be checked before ordering.
Why must the pneumatic connection size be confirmed?
The external tube standard may be Ø6 mm or 1/4 inch. Ordering the wrong connection can require adapters and may create installation or hygiene problems.
Can LGN identify a unit from photos?
Usually yes, provided the photos clearly show the nameplate, connector side, internal module, solenoid arrangement and mounting interface. The complete OEM number remains the safest identification method.
Are control-head spare parts interchangeable between generations?
They should not be assumed interchangeable. Electronics, sensors, covers, bases, solenoid manifolds and service kits can differ by product generation and revision.
What information is required for an accurate quotation?
Provide the complete OEM item number, model, quantity, valve type, actuator function, communication protocol, solenoid configuration, electrical connector and pneumatic connection size.

Need OEM Identification or a Complete Quotation?

Send the control-head item number, valve details, quantity and clear photos. LGN can review compatibility and prepare the correct OEM or equivalent supply proposal.

Request Technical Support
Catalogue disclaimer: OEM names and item numbers are used for identification and cross-reference purposes. Final compatibility must be confirmed against the installed valve, actuator, control architecture and current manufacturer documentation before purchase or installation.