4 Technical specifications
4.1
ThinkTop, PLC 8-30 VDC interface
“No Touch” sensor system
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1. Sensor unit
2. PLC, feedback
3. Sensor board
4. PLC interface board
5. IR Remote control
6. IR Rx
7. Serial link
8. LEDs
9. +5 V
10. Terminals
11. Terminals
12. Feedback signals
13. Solenoid signals
14. Supply voltage
15. Solenoid common
16. PLC Cable
17. Internal connections
18. Solenoid signals
19. Solenoid common
20. External seat-lift (PNP)
21. Supply sensors
22. External connections
Type: Alfa Laval “No Touch” System. For wire connections: See 5.4 Electrical connection, internal.
Features
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Tolerance programmes.
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Self adjustment programme (SRC/ARC valves only).
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Built-in maintenance monitor.
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Setup by internal push buttons or remote control (IR Keypad).
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Setup and local fault supervision.
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Setup saved at power shutdown.
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Visual LED Indicator lights.
Sensor System
Unique “No Touch” sensor system without any mechanical sensor adjustments. A magnet (indication pin) is mounted on the
valve stem and the magnetic field (axial) is detected by sensor chips inside the sensor board. The measuring angle from each
chip is used to locate the current position of the valve stem with an accuracy of ± 0.1mm. Note that the distance to the
indication pin can be 5 mm ± 3 mm.
Feedback signals
The sensor system can be used for 4 feedback s 1 status signal = 5 digital PNP/NPN feedback signals. Selection of PNP
or NPN is done by a jumper. Two of the feedback signals can be external sensors if necessary.
The status signal is used for detection of the following conditions:
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A set-up is in progress.
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Internal error.
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Maintenance is required (based on time and/or the self adjustment programme).
Tolerance programme
Individual programme according to valve types.
Type 0: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bypass valve type / keep present valve type.
Type 1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SRC/ARC and Series 700 valves, only when self adjustment is enabled - Not recommended.
Type 2: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LKB (LKLA-T).
Type 3: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unique Mixproof, SMP-SC Spillage-Free, and SRC-PV.
Type 4: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMP-SC, SMP-TO, SMP-BC, SMP-BCA, SBV, SRC, ARC, Unique SSV,
Unique SSV Aseptic, Unique-TO and Series 700 valves.
Type 5: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All Parameters Set To Default (also valid for MH valve and SMP-EC
(seat-lift indication not possible for SMP-EC)).
Preset and reset values: Tolerance programme No./Type 5 (± 5mm) and all functions are disabled.
Note! Important to select the right tolerance programme in order to ensure optimum controlled closeness of valves.
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