The easy choice when indication is all you need
IndiTop 8-30 VDC/AC
General information The indication unit IndiTop from Alfa Laval is designed as a simple and easy to use, electrical feedback unit for Alfa Laval sanitary valves. It is compatible with all major PLC (Programmable Logic Controller) digital input cards. It is for use in food, dairy and brewery installations and in biopharmaceutical applications. The unit is mounted on the valve actuator "mushrooms" with two Allen screws and on the valve stem. Once setup either by the quick and easy "5 push setup" or remotely from the PLC, the unit will be able to send feedback about the valve position through a fixed cable.
Sensor System
IndiTop is a unique "No Touch" sensor system without any mechanical adjustments. An indication pin (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 accuracy of ± 1mm. Note that the distance to the indication pin can be 5 mm ± 3 mm.
Feedback Signals
IndiTop is capable of providing two 2 PNP/NPN digital feedback signals in both DC and AC. For cable version the selection of PNP or NPN is done by wiring and for the plug version the selection is done by Item no.
Visual indication through LEDs are constantly displaying the current valve position and power (ON/OFF)
Key Features
- Works with both DC and AC supply voltage (8-30 VDC/AC)
- Two PNP/NPN digital DC/AC feedback signals
- Quick and easy "5 push setup" through pushbuttons
- Able to perform the setup remotely from the PLC
- Keeps the setup during power downs
- Visual indication through LEDs
- No mechanical adjustments or wear
- Only one version. No need for additional spare parts
- ± 5 mm tolerance for saved positions
- No maintenance.
Technical Data
Materials
Plastic parts . . . . . . . . . . . . . . . . . .Nylon PA 6 and POM
Rubber parts . . . . . . . . . . . . . . . . . .SEBS
Metal parts: . . . . . . . . . . . . . . . . . . .Stainless steel DIN 914 A2. Brass
Sensor System
Sensor accuracy: . . . . . . . . . . . . . . .± 1 mm
Distance to magnet: . . . . . . . . . . . . .5 ± 3 mm
Stroke length: . . . . . . . . . . . . . . . . .6 - 80 mm
Electrical interface
5 or 10 metres ¸5 mm fixed PVC cable with 6 x 0,129 mm2 wires.
Plug M12, 5 pin with 0.5 metres, ¸5 mm fixed PVC cable with 6 x 0.129 mm2 wires.
Protection Class
Cable version IP66/67.
Plug version IP66/67.
Power Supply
IndiTop is designed to be a part of the PLC's Input/Output (I/O) system. It should be supplied from the same protected power supply as the other I/O devices. The unit is reverse polarity and short circuit protected. The power supply must meet the requirements of EN 61131-2.
Supply voltage: . . . . . . . . . . . . . . . .8 - 30 VDC/AC
Supply voltage nominal: . . . . . . . . . .24 VDC/AC (RMS) (-15%/ +20%as per EN 61131-2:2003)
Max. ripple: . . . . . . . . . . . . . . . . . . .5% of nominal supply voltage
Supply voltage absolutemax: . . . . . .30 VDC/AC
Supply voltage absolutemin.: . . . . . . .8 VDC/AC
Supply current*): . . . . . . . . . . . . . . .Max. 45 mA
*) The initial current during power-on is higher. The actual shape of the current pulse depends on the power supply used. Typical values are 150mA RMS during 13 ms (regulated PS) to 360 mA RMS during 8 ms (unregulated PS).
The fulfilling of the UL requirements in UL508 requires that the unit is supplied by an isolating source complying with the requirements for class 2 power units (UL1310) or class 2 and 3 transformers (UL1585).
Feedback Signals
Output signals from the sensor unit to the connected digital interface (PLC).
Nominal voltage: . . . . . . . . . . . . . . .Same as supply voltage.
Load current: . . . . . . . . . . . . . . . . . .50 mA typically, 100 mA max.
Voltage drop: . . . . . . . . . . . . . . . . . .Typically 3 V at 100 mA
Selecting PNP/NPN
PNP (sourcing) or NPN (sinking) function is selected through the brown wire in the cable.
PNP (DC/AC) = Brown wire connected to + (DC) / L1 (AC).
NPN (DC/AC) = Brown wire connected to (DC) / N (AC).
Relief plug
The indication unit IndiTop is provided with a relief plug which opens in case of an actuator leakage.
If a leakage occurs the plug remains attached to the unit and can be put in its place again.
Environment
Electrical connectionsThe fixed cable consists of 6 wires. For standard 2 feedback not using the remote setup feature only 4 wires need to be connected to external systems (Red/Black/Green/Yellow). Brown is always connected to either Red (PNP) or Black (NPN) depending on whether PNP or NPN is required. The orange wire must be connected to Red if the remote setup feature is not used. 
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