IM70824-GB1

9905

Operating Manual
ThinkTop® Digital 8-30 VDC PNP/NPN

Patented Sensor System

Registered Design
Registered Trademark
 Declaration of Conformity

The designating company

Alfa Laval
Company Name

6000 Kolding
Address

+45 79 32 22 00
Phone No.

hereby declare that

TOP UNIT FOR

VALVE CONTROL & INDICATION ThinkTop®
Denomination Type Year

is in conformity with the following directives with amendments:

- Low Voltage Directive 73/23/EEC

- EMC Directive 89/336/EEC

Bjarne Søndergaard Vice President, R & D

Name Title

Alfa Laval
Company Signature

Designation
 Table of contents

This manual is divided into main sections. Please note that the drawing and the setup diagrams
- See below. on pages 23, 25 and 27 can be unfolded and
support the reading of the manual.

Safety 1. Important information ................................... 2

2. Warning signs .............................................. 2
3. Safety precautions ....................................... 3

1
General information 1. Digital in general .......................................... 4

Specifications 1. ThinkTop®, PLC 8-30 VDC interface ........... 5

1.1 "No Touch" sensor system .................... 5
1.2 Technical specifications sensor
system .................................................. 6
1.3 Technical specifications solenoid
valves .................................................... 8

Installation 1. Installation on air actuators .......................... 9

2. Electrical connection, internal .................... 12

Fault finding 1. Fault finding and LEDs ............................... 13

Setup 1. ThinkTop® complete setup push-buttons

(local keys) ................................................ 15
1.1 Push-button setup procedure ............... 15
2. ThinkTop® complete setup IR Handheld
(keypad) ..................................................... 18
2.1 IR Handheld (keypad) setup procedure .. 18

Maintenance 1. Dismantling of ThinkTop® .......................... 20

2. Reassembly of ThinkTop® ......................... 21

Setup diagrams 1. ThinkTop® setup utilising local 'I'

and 'II' keys ................................................ 23
2. ThinkTop® setup utilising IR keypad .......... 25

Drawings/Parts list 1. Exploded drawing ....................................... 26

2. Drawing/Parts list ....................................... 27

Information 1. Notes ......................................................... 28

2. User feedback ............................................ 28
 Safety

Unsafe practices and other important information are Warnings are emphasized by means of special
emphasized in this manual. signs.

1. Important information
Always read the manual before using the top unit!

2
WARNING! : Indicates that special procedures must be
followed to avoid severe personal injury.

CAUTION! : Indicates that special procedures must be

followed to avoid damage to the ThinkTop®.

NOTE! : Indicates important information to simplify

practices or to make them clearer.

2. Warning signs
: General warning.

: Caustic agents.
 Safety

Pay special attention to the instructions below so that

severe personal injury and/or damage to the top unit
are avoided.

3. Safety precautions
Installation:
: Always read the technical specifications
thoroughly (see pages 5 to 8). 3

: - Always have the ThinkTop® electrically con

nected by authorized personnel.
- Never install the ThinkTop® before valve or
relay is in a safe position.

: If welding close to the ThinkTop®:

- Always earth close to the welding area.
- Disconnect the ThinkTop®.

Maintenance:
: Always read the technical specifications
thoroughly (see pages 5 to 8).

: - Never clean the ThinkTop® with high

pressure cleaning equipment.
- Never use cleaning agents when cleaning
the ThinkTop®.

: Always fit the seals between valve and

ThinkTop® correctly.

: - Never service the ThinkTop® before valve or

relay is in a safe position.
- Never service the ThinkTop® with valve/
actuator under pressure.
 General information

1. Digital in general
The ThinkTop® is designed to ensure optimum valve control in conjunction with Alfa Laval valves and
it is compatible with most PLC systems (Programmable Logic Controllers maker with PNP/NPN
4 interface).

The ThinkTop® can be equipped with 0-3 solenoid valves. The solenoids are electrically controlled by
the Digital and when activated the compressed air is activating the air actuator. All solenoids have
build-in throttle PLC function on both air inlet and outlet which means that it is possible to control the
opening and closing time of the air actuator. The solenoids are also equipped with a manual hold
override.

Visual LED lights are constantly indicating the status of the unit: Valve positions, solenoid activated,
setup and local fault indication etc.

The ThinkTop® is characterized by a simple and modular design. It is exchangeable and is prepared
for upgrading.

Note! Year 2000 Conformity: The ThinkTop® is without year representation.

 Specifications

1. ThinkTop®, PLC 8-30 VDC interface

1.1 “No Touch” sensor system

5
Sensor unit
Sensor PLC Interface
PLC, board board
feedback IR IR Remote Control
Rx

Serial
link LEDs

Feedback signals
+5 V Terminals Solenoid signals
Supply voltage PLC Cable
Solenoid common

Solenoid signals External seat-lift (PNP)

Internal External
Solenoid common Supply sensors connections
connections

Type: Alfa Laval “No Touch” System

For wire connections: See section 2. “Electrical connection, internal” page 12.

Features
Tolerance programmes.
Self adjustment programme (SRC/ARC valves only).
Built-in maintenance monitor.
Setup by internal pushbuttons or remote control (IR Keypad).
Setup and local fault supervision.
Position saved at power shutdown.
Visual LED Indicator lights.

Sensor System
Unique “No Touch” sensor system without any mechanical sensor adjustments. A magnet is mounted
on the valve stem and the magnetic field (axial) is detected by sensor chips inside the sensor unit. The
measuring angle from each chip is used to locate the current position of the valve stem with an accu-
racy of ± 0.1mm. Note that the distance to the magnet can be 5 mm ± 3 mm.

Feedback Signals
The sensor system can be used for 4 feedback signals + 1 status signal = 5 digital PNP/NPN feed-
back signals. Selection of PNP or NPN is done by a jumper. Two of the feedback signals can be used
for external sensors if necessary.

The status signal is used for detection of the following three conditions:
- A set-up is in progress.
- Internal error.
- Maintenance is required (based on time and/or the self adjustment programme).
 Specifications

1.1 “No Touch” sensor system

Tolerance programme:
Individual according to valve types.
* Type 1: SRC / ARC, SMP-BC valves.
6 * Type 2: LKB (LKLA-T) valves.
* Type 3: SMP-EC.
* Type 4: SMP-SC + Spillage free.
* Type 0: (Preset) All Parameters Set To Default.
Preset and reset values: Tolerance programme No. 0 (± 5mm) and all functions are disabled.
NOTE! Important to select the right tolerance programme.

Self Adjustment (SRC/ARC valves only)

The self adjustment feature is an exceptional aspect of the ThinkTop® design. A programme can be
activated to allow an adjustment of the tolerance band if the seals in the valve are being compressed
or are worn. When the tolerance band of the unit has been adjusted 0.3 mm, an alert warning will
appear in the form of a status signal and a flashing maintenance LED. After 0.5 mm adjustment an
alarm warning appears: Loss of feedback signal, status signal and steady maintenance light indicating
a minimum of seal left requiring a replacement of the seal.

Built-in Maintenance Monitor

The unit can be preset to indicate when the time for maintenance of the valve has been reached. A
status signal and flashing maintenance LED can be programmed to return after 3, 6, 9 or 12 months or
more.

1.2 Technical specifications sensor system

Sensor accuracy ........................................................ ± 0,1 mm.
Distance to magnet .................................................... 5 ± 3 mm.
Stroke length ............................................................. 0.1 - 80 mm.
Electrical connection .................................................. Direct cable gland entry (hard wired)
.................................................................................. PG11 (ø4 - ø10 mm).

Terminals
The terminal row of the sensor unit is equipped with screw terminals for both internal as well as
external cables and wires. The terminals are suitable for wires up to 0.75 mm 2.

Power Supply
The unit is reverse polarity and short circuit protected.
Supply voltage ........................................................... 8 - 30 V DC.
Supply current ............................................................ Max. 45 mA (for sensor unit alone)
.................................................................................. (excluding current to the solenoids, external
.................................................................................. proximity switches and the PLC input current).

Feedback signals
Output signals from the sensor unit to the connected digital interface (PLC).
Nominal voltage ......................................................... Must match the selected type of ThinkTop®.
Load current ............................................................... Max. 100 mA.
Voltage drop ............................................................... Max. 2 V at max. load current.
 Specifications

1.2 Technical specifications sensor system

External sensors
The external sensors are used for seat-lift supervision when seat-lift can not be internally detected.
The sensors get their supply voltage from the terminal row.The output signals from the sensors are 7
connected to two inputs on the terminal row on the internal sensor unit. If the actual setup is set for
internal seat-lift, the corresponding external signal is not used, otherwise the external signal logically
controls the corresponding feedback to the PLC (Programmable Logic Controller).

Supply voltage ............................................................ Must match the selected type of ThinkTop®.

Supply current ............................................................ Max. 15 mA per sensor.
Type of sensor ........................................................... Only 3-wire sensor PNP.

Polarity
PNP (sourcing) or NPN (sinking) function is selected with a jumper in term. 12 and 13.
Jumper present = PNP. If changing to NPN remove the jumper and make a power recycle. A power
recycle is always required when changing this function.

ThinkTop® Visual Indications LED Indications

LED A "Open valve" (Yellow)

IR-Receiver
LED D "Setup/Internal fault" (Red)
LED C "Seat-lift 1/2" (Yellow)
LED E "Solenoid valves" (Green)
LED F "Maintenance" (Orange)
LED A "Closed valve" (Yellow)

Feedback signals:
Signal: "Closed Valve" Terminal 1 (Feedback #1)
Signal: "Open Valve" Terminal 2 (Feedback #2)
Signal: "Seat-lift 1" Terminal 3 (Feedback #3)
Signal: "Seat-lift 2" Terminal 4 (Feedback #4)
Signal: "Status" Terminal 5 (Feedback #5)

For wire connections: See section 2. "Electrical connection, internal page 12.

Note: If the programmer wishes to detect a physical closed valve position in an "Open Valve" sensor
position, then there is no longer any consistence between the sensor valve detection position and the
visual indications of the ThinkTop®.

Status signal:
The status signal (Feedback # 5) is used for four purposes:
* To indicate that setup is in progress + (LED D).
* To indicate an error condition + (LED D). (Flashing LED = software error), (steady LED = hardware
error).
* To indicate maintenance due to the self adjustment programme + (LED F).
* To indicate that the time for maintenance has been reached + (LED F).
 Specifications

1.3 Technical specifications solenoid valves

Solenoid signals
Three output signals (with one common) from the terminal row are used for activation of the solenoids.
Depending on the digital interface (Programmable Logic Controller) used, the common could be either
8 positive or negative for DC voltage. The signals are galvanically isolated from the sensor circuits.

Internal connections
Terminals for connection of the solenoids mounted internally in the control head.
The number of solenoids actually mounted in the control head could be 0 - 3.
The signals are taken directly from the terminal row.

Technical data
Up to 3 solenoid valves in each unit.
Type ........................................................................... 3/2 or 5/2 valve (only possible with one 5/2 valve).
Air supply ................................................................... 300-900 kPa (3-9 bar).
Filtered air, max. particles or dirt ................................ 0.01 mm.
Max. oil content ......................................................... 1.0 ppm.
Max. water content .................................................... 0.0075 kg/kg air.
Throughput ................................................................. ø2.5 mm.
Air restriction (throttle function) air inlet/outlet.
Manual hold override.
External air tube connection ....................................... ø6 mm or 1/4".
Nominal voltage .......................................................... 24 V DC.
Nominal power ........................................................... 1.0 W.

Micro environment demand specifications

Temperature
Working: -20°C to +85°C IEC 68-2-1/2
Storage: -40°C to +85°C IEC 68-2-1/2
Temperature change: -25°C to +70°C IEC 68-2-1/4

Vibration 10-55 Hz, 0.7 mm IEC 68-2-6

55-500 Hz, 10g
3*30 min, 1 octave/min

Drop test IEC 68-2-32

Humidity
Constant humidity: +40°C IEC68-2-3
Cyclic humidity: +25°C/+55°C
12 cycles IEC 68-2-30
(working) 93% R.H.

Protection class IP67 IEC 529

Input threshold
Voltage/current: Type 1 input requirements EN 61131-2
Solenoid signals: (1000 + 2*117) VAC rms/1min EN 61131-2

EMC Directive 89/335/EEC EN 50081-1, EN 50082-2

KA 2791.30 Tetra Pak Corporate
Standard
 Installation

1. Installation on air actuators

1 2

Always read the technical specifications

thoroughly (see pages 5 to 8).

1. Fit the air fittings on actuator if not mounted.

2. Fit the activator stem (magnet) and tighten
carefully with a spanner.
- Always have the ThinkTop® electrically con- NOTE!
nected by authorized personnel. The ThinkTop® for the SMP-EC valve has a longer
- Never install the ThinkTop® before valve or activator stem which is going through the shell.
relay is in a safe position. Remember O-ring.

1. Ensure that the unit is correctly mounted by

pressing down on top of the ThinkTop®.
2. Tighten the two Allen screws carefully.
3. Turn the actuator to have LEDs in a front view.
NOTE!
After a relevant period of time (e.g. two
1. Place the ThinkTop® on top of the actuator. weeks) it is recommended to check that all
2. Make sure X-ring is mounted. connections are properly tightened.

4 5

Fit the ø6 mm (1/4") air tubes to ThinkTop® (see Fit the air tubes to the actuator (see drawing "Air
drawing "Air connections" page 11). connections" page 11).
 Installation

1. Installation on air actuators

6 7

10

1. Install cable (if not present) through the

cable gland.
Untighten the three screws and pull off cover of 2. Connect the ThinkTop® electrically (See
ThinkTop®. page 12 "Electrical connection, internal").

8 9

Set up the ThinkTop® (see chapter "Setup" the

following pages).
NOTE!
The unit can be set up with the cover installed by
using the IR keypad. To energize the valve, use
Make sure the cable gland is completely a separate air tube or be in radio contact with the
tightened. control room.
 Installation

Air connections: 11

Air restriction (throttle

function) air inlet/outlet

Air out 1A
Air restriction (throttle
function) air inlet/outlet

Air exhaust
Manual hold override
Air out 1B (5/2 port
solenoid valve only)

Solenoid valve

Air out 2

Air out 3

Air in
 Installation

2. Electrical connection, internal

12
Closed valve
Solenoid 1
Open valve
Solenoid 2
Seat-lift 1 Feedback signals
Solenoid 3 to digital interface
Digital interface Seat-lift 2
Supply +
command signals Status
Supply -
NPN/PNP Jumper Jumper
Solenoid com. connections **)
NPN/PNP Jumper
Earth
Seat-lift 1 *)
Solenoid com.
Seat-lift 2 *) Incoming signals
Internal connec- Solenoid 1
tions to solenoid Supply + *) from external
1-3. Solenoid 2 sensors
Supply - *)
Solenoid 3

*) Note! Terminals 24, 25, 26 and 27 can be used for external seat-lift sensors as well as for any
digital input. Always use an external PNP sensor.
**) Note! Jumper present = PNP. If changing the function a power recycle is necessary. The selec-
tion NPN/PNP is done by the jumper.

Note! Remember to isolate wires that are not in use.

 Fault finding

1. Fault finding and LEDs

Below is stated the meaning of the LEDs' indications for fault finding in connection with the operation of
the ThinkTop®.

13
Red flashing: Unit in set-up mode or internal software fault.
If internal software fault, re-programme unit.
Red
Red steady: Unit in set-up mode or internal hardware fault.
If internal hardware fault, check if magnet is in range and check
correct wiring.

Yellow B 1.Orange flashing: Time for maintenance has run out.

The unit has been self-adjusted into a maintenance alert condition.
Valve maintenance is strongly recommended. After maintenance:
Disabling of maintenance/self-adjustment function is required before
setting new position, however we strongly recommend to make a
complete new setup after valve maintenance.

Orange 2.Orange steady,

yellow flashing
Yellow A
(A and/or B): The unit has been self-adjusted into a maintenance alarm condition
and the feedback is lost (a minimum of seal left).
Valve maintenance is required. After maintenance: Disabling of the
self-adjustment function is required before setting new position,
however we strongly recommend to make a complete new set up after
valve maintenance.

Yellow steady: Position A (closed valve).

Yellow A
 Fault finding

1. Fault finding and LEDs

14
Yellow B Yellow steady: Position B (open valve).

Yellow steady: Position C (seat-lift 1-2 or external sensors).

Yellow

Green steady: Solenoid valves activated.

Green

Note! During setup LED lights have different functions.

 Setup

1. ThinkTop® complete setup push-buttons (local keys)

There are two push-buttons with four functions which are used for the setup procedure:

I “Next” (Press) 15
II “Acknowledge” (Press) I
I Press and hold (5 seconds) II
II Press and hold (5 seconds) LKM

CE

Diagram page 23 can be unfolded and support the reading of the Setup procedure.

In the description below I, II means that pushbutton I or II is pressed. A, B ... F represents the LED’s.

If button(s) are pressed and not released within 60 seconds, goto Common Error Condition.

A 60 second time-out is started as soon as any button(s) are released.

If no button is pressed during the time-out time, goto Normal condition (cancel & exit).

Common Error Condition:

LED D flashing (software error) or steady (hardware error), the “Status” output is set and all other LED’s
turned off.

Write sequence:
LED D flashing.
When II is released, the new values are written to EEPROM from RAM and verified.
If (OK) ⇒ goto Normal Condition.
else goto Common Error Condition.

Reset sequence:
LED D flashing.
When II is released, select preset values ⇒ goto Setup_loop.

1.1 Push-button setup procedure

Step 0: Normal Condition:

I ⇒ goto Setup_loop.

Step 1: Setup_loop:
Enter_setup:
LED D flashing.
I ⇒ goto Tolerance_type.
II ⇒ goto write sequence.
II ⇒ Press and hold for minimum 5 seconds ⇒ goto Normal condition (cancel & exit).
 Setup

1.1 Push-button setup procedure

Step 2: Tolerance_type:
LED D steady. A combination of LED C, E, F and A as a representation of the tolerance
type (Type 0 = C flashing, Type 1 = C steady, Type 2 = C,E steady, Type 3 = C,E,F steady,
16 Type 4 = C, E, F, A steady).
Preset setting type 0.
I ⇒ goto Set_closed.
II ⇒ increment tolerance type ..1,2,3,4,1,.... LED C; E, F and A illuminated accordingly.
Selection stored temporarily.
II ⇒ Press and hold for minimum 5 seconds ⇒ goto reset (select preset values. Type 0 and all
functions are disabled).

Step 3: Set_closed:
LED D and A steady if enabled, A flashing if disabled (preset value).
I ⇒ goto Set_open.
II ⇒ store closed position temporarily and enable function, goto Set_open.
II ⇒ Press and hold for minimum 5 seconds ⇒ disable function, goto Set_closed. Feedback
closed is cleared and LED A is flashing to indicate function disabled (preset value).

Step 4: Set_open:
LED D and B steady if enabled, B flashing if disabled (preset value).
I ⇒ goto Set_seat1.
II ⇒ store open position temporarily and enable function, goto Set_seat1.
II ⇒ Press and hold for minimum 5 seconds ⇒ disable function, goto Set_open. FB open is
cleared and LED B is flashing to indicate function disabled (preset value).

Step 5: Set_seat1:
LED D, C and B steady if enabled, B flashing if disabled (preset value).
I ⇒ goto Set_seat2.
II ⇒ store seatlift_1 position temporarily and enable function, goto Set_seat2.
II ⇒ Press and hold for minimum 5 seconds ⇒ disable function, goto Set_seat1. FB seatlift 1 is
cleared and LED B is flashing to indicate function disabled (preset value).

Step 6: Set_seat2:
LED D, C and A steady if enabled, A flashing if disabled (preset value).
I ⇒ goto Self_adjust.
II ⇒ store seatlift_2 position temporarily and enable function, goto Self_adjust.
II ⇒ Press and hold for minimum 5 seconds ⇒ disable function, goto Set_seat2. FB seatlift 2 is
cleared and LED A is flashing to indicate function disabled (preset value).

Step 7: Self_adjust:
LED D steady. LED E flashing if disabled (preset value)
A combination of LED E, A and B as a representation of the self adjustment type (Type 0 = E
flashing, Type 1 = E, A and B steady, Type 2 = E and A steady, Type 3 = E and B steady)
Preset setting type 0
I ⇒ goto Maintenance_interval.
II ⇒ increment self-adjust type ..1,2,3,1... (2 and 3 not in use) LED E, A and B illuminated
accordingly.
II ⇒ Press and hold for minimum 5 seconds ⇒ disable function, goto Self_adjust. Clear
Self_adjust, LED E is flashing to indicate function disabled (preset value).
 Setup

1.1 Push-button setup procedure

Step 8: Maintenance_interval:
LED D steady. A combination of LED F, C, E and A as a representation of the tolerance type
(Type 0 = F flashing, Type 1 = F steady, Type 2 = F steady + C flashing, Type 3 = F steady + C,
E flashing, Type 4 = F steady + C, E, A flashing. By incrementing more than 360 days, LED's F,
17
C, E and A will flash.
Preset setting type 0.
I ⇒ goto Enter_setup.
II ⇒ Enable function and increment interval (90, 180, 270, 360 days or more).
II ⇒ Press and hold for minimum 5 seconds ⇒ disable function, goto Maintenance_interval. Clear
the counter, LED F is flashing to indicate function disabled (preset value).
NOTE!
To reselect a maintenance interval, function should first be disabled by pressing and holding II for
5 seconds and then pressing II to the appropriate increment. If II is pressed without first disabling
the function, then the present remaining maintenance time will be increased by the increment
interval selected.
 Setup

2. ThinkTop® complete setup IR Handheld (keypad)

0 “Next”
1-5 “Commands” 0 1 2
18
3 4 5

Diagram page XX can be unfolded and support the reading of the setup procedure.

In the description below 0, 1, 2, 3, 4, 5 means that the relevant key on the hand-held unit is pressed.
A, B, C, D, E, F represents the LED’s.

If keys are pressed and not released within 60 seconds, goto Common Error Condition.

A 60 second time-out is started as soon as any key is released.

If no key is pressed during the time-out time, goto Normal Operation (cancel & exit).

Write sequence:
LED D flashing.
Press 1. The new values will be written to EEPROM from RAM and verified.
If (OK) ⇒ goto Normal Condition.
else goto Common Error Condition.

Reset sequence:
LED D flashing.
When 5 is released, select preset values ⇒ goto Setup_loop.

2.1 IR Handheld (keypad) setup procedure

Step 0: Normal Condition:

0 ⇒ goto Setup_loop.

Step 1: Setup_loop:
Enter_setup:
LED D flashing.
0 ⇒ goto Tolerance_type.
1 ⇒ goto write sequence.
2 ⇒ goto Normal Condition (cancel & exit).

Step 2: Tolerance_type:
LED D steady.
Preset setting Type 0. LED C flashing
0 ⇒ goto Set_closed
1 ⇒ select Type 1 tolerance. Store setting temporarily. LED C steady.
2 ⇒ select Type 2 tolerance. Store setting temporarily. LED C,E steady.
3 ⇒ select Type 3 tolerance. Store setting temporarily. LED C,E,F steady.
4 ⇒ select Type 4 tolerance. Store setting temporarily. LED C,E,F,A steady.
5 ⇒ goto reset (select Preset values. Type 0 and all functions are disabled).
 Setup

2.1 IR Handheld (keypad) setup procedure

Step 3: Set_closed:
LED D and A steady if enabled, A flashing if disabled (preset value).
0 ⇒ goto Set_open.
1 ⇒ store closed position temporarily and enable function, goto Set_open.
19
5 ⇒ disable function, goto Set_closed. FB closed is cleared and LED A is flashing to indicate
function disabled (preset value).

Step 4: Set_open:
LED D and B steady if enabled, B flashing if disabled (preset value).
0 ⇒ goto Set_seat1.
1 ⇒ store open position temporarily and enable function, goto Set_seat.
5 ⇒ disable function, goto Set_open. FB open is cleared and LED B is flashing to indicate
function disabled (preset value).

Step 5: Set_seat1:
LED D, C and B steady if enabled, B flashing if disabled (preset value).
0 ⇒ goto Set_seat2.
1 ⇒ store seatlift_1 position temporarily and enable function, goto Set_seat2.
5 ⇒ disable function, goto Set_seat1. FB seatlift 1 is cleared and LED B is flashing to indicate
function disabled (preset value).

Step 6: Set_seat2:
LED D, C and A steady if enabled, A flashing if disabled (preset value).
0 ⇒ goto Self_adjust.
1 ⇒ store seatlift_2 position temporarily and enable function, goto Self_adjust.
5 ⇒ disable function, goto Set_seat2. FB seatlift 2 is cleared and LED A is flashing to indicate
function disabled (preset value).

Step 7: Self_adjust:
LED D steady. LED E flashing if disabled (preset value)
A combination of LED E, A and B as a representation of the self adjustment type (Type 0 = E
flashing, Type 1 = E, A and B steady, Type 2 = E and A steady, Type 3 = E and B steady)
Preset setting type 0
0 ⇒ goto Maintenance_interval.
1 ⇒ select Type 1 (self-adjust. SRC / ARC valves). Store setting temporarily. LED E, A and B
steady.
2 ⇒ select Type 2 (not in use). Store setting temporarily. LED E and A steady.
3 ⇒ select Type 3 (not in use). Store setting temporarily. LED E and B steady.
5 ⇒ disable function, goto Self_adjust. Clear Self_adjust, LED E is flashing to indicate function
disabled (preset value)

Step 8: Maintenance_interval:
LED D steady, F flashing if disabled (preset value).
0 ⇒ goto Enter_setup.
1 ⇒ enable function, set interval of 90 days, goto Enter_setup. LED F steady.
2 ⇒ enable function, set interval of 180 days, goto Enter_setup. LED F steady, C flashing.
3 ⇒ enable function, set interval of 270 days, goto Enter_setup. LED F steady, C, E flashing.
4 ⇒ enable function, set interval of 360 days, goto Enter_setup. LED F steady, C, E, A flashing.
5 ⇒ disable function, goto Maintenance_interval. Clear the counter, LED F is flashing to indicate
function disabled (preset value).
 Maintenance

Study the instructions carefully. Always keep spare X-rings in stock.

Handle scrap correctly.

1. Dismantling of ThinkTop®

1 2

20

1. Remove the ThinkTop® of the actuator. 1. Untighten the three screws.

2. Pull out X-ring and replace it. 2. Pull off cover of ThinkTop®.

3 4

1. To dismantle the adapter (the lower part of

the ThinkTop®) from base (the middle part),
1. Untighten screws. unscrew the three screws.
2. Remove solenoid valves (up to three) and 2. Turn the lower part a little clockwise and pull.
replace them by new ones. 3. Replace adapter if necessary.

To remove the sensor unit untighten screw and

pull out the sensor unit.
 Maintenance

Study the instructions carefully. Always keep spare X-rings in stock.

Handle scrap correctly.

2. Reassembly of ThinkTop®

1 2

21

Assemble base with adapter by turning adapter a

Place sensor unit in base and tighten screw. little anticlockwise and tighten the three screws.

3 4

1. Replace solenoid valves (up to three) by new

ones. Replace cover of ThinkTop® and tighten the three
2. Tighten screws. screws.

1. Replace X-ring.
2. Mount ThinkTop® on actuator.
 Setup diagram

ThinkTop® setup utilising local 'I' and 'II' keys

23

ThinkTop® Visual Indications LED Indications

LED A "Open valve" (Yellow)

IR-Receiver
LED D "Setup/Internal fault" (Red)
LED C "Seat-lift 1/2" (Yellow)
LED E "Solenoid valves" (Green)
LED F "Maintenance" (Orange)
LED A "Closed valve" (Yellow)
 Setup diagram

ThinkTop® setup utilising local 'I' and 'II' keys

23 24
 Setup diagram

ThinkTop® setup utilising IR keypad

25

ThinkTop® Visual Indications LED Indications

LED A "Open valve" (Yellow)

IR-Receiver
LED D "Setup/Internal fault" (Red)
LED C "Seat-lift 1/2" (Yellow)
LED E "Solenoid valves" (Green)
LED F "Maintenance" (Orange)
LED A "Closed valve" (Yellow)
 Setup diagram Exploded drawing

This page shows an exploded drawing of the Digital The items are identical with the items in the Spare
ThinkTop® version. Parts List.

ThinkTop® setup utilising IR keypad ThinkTop®, Digital 8-30 VDC PNP/NPN

25 26
 Drawing/Parts list

The drawing and the parts list include all items The items are identical with the items in the The drawings below show the ThinkTop® The items refer to the parts list on the oppostie
of the top unit. Spare Parts List. unit. part of the page.
When ordering spare parts, please use the Spare
Parts List!

Parts list ThinkTop®, Digital 8-30 VDC PNP/NPN

Pos. Qty. Denomination

1a 1 Shell complete
1b 1 Shell complete 27
2 1 O-ring, NBR
3 1 Screw
4 1 Washer
5 1 Sensor unit Digital 8-30 VDC PNP/NPN
6 1 Solenoid valve
7 3 PT screw
8 1 Base complete
9 1 O-ring, NBR
10 1 Air fitting
11 1 Blow-off valve
12 1 Thread plug, PG7
13 1 Cable gland, PG11
14 1 Pressure control valve
15 1 Adapter complete
1 Adapter, cast
16 1 O-ring
17 1 O-ring
18 1 Allen screw
19 1 Special X-ring
20a 1 Indication pin complete
20b 1 Indication pin complete
21 1 O-ring, EPDM
171.6

Note that this is the basic design, the

clearness should be approximately:

ø 180 x 250 (SRC NC)

ø 180 x 320 (SRC NO)
ø 180 x 300 (LKB (LKLA-T)

ø137
Alfa Laval Flow
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Telephone: +44 1737 85 40 00
Fax: +44 1737 85 40 39
E-mail: flow.hq.alfalaval.com
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