iSAtech water GmbH
iSAtech Control Unit Prepaid control unit for water kiosks
With the iSAtech Control Unit, users can obtain clean drinking water from water kiosks. When the user places their NFC card on top, the water is dispensed, and the amount is offset against the credit stored on the card. Water can be dispensed until the card is removed or the credit is used up. The device is designed for challenging environmental conditions such as extreme temperatures, humidity, sand, and insect infestation. It can be operated online and offline and can, therefore, also be used in regions with limited network coverage.

The iSAtech Control Unit is available as a built-in version for installation on DIN rails and as a robust, remote control unit for outdoor installation. This means it can be easily and flexibly integrated into existing water kiosks. It is installed next to the water outlet where it is easily accessible and connected to the valve and meter by cable. This keeps the water technology inside well protected. Power can be supplied flexibly via a solar battery or a rechargeable battery.

If the device is equipped with a LoRa radio module, current credit information can be received, and all consumption and credit data can be transmitted to the iSAtech PayU-Cloud via the iSAtech Radio Gateway.

Online and offline availability

Prepaid credit can be provided in two ways: online and offline.

In online mode, the credit can be topped up at a retailer or via mobile payment services. The credit is automatically available at any online control device when the consumer inserts their NFC ID card.

In offline mode, the credit is stored on the NFC credit card, and the consumer can use it at any online and offline control unit.

Technical data

Recharging Credit
Prepaid card
Mobile network/Internet

Technology
NFC/RFID card
ISO/IEC 15693-2,-3; 18000-3
433MHz / 868 MHz / LoRa*

Profile
Private: One consumer
Public water (kiosk): Several consumers
Measurement: Quantities (liters, kWh)
Calculation: Time-based
Measurement and monitoring only

Functions
Supply of water, electricity, heat
Measurement, billing, logging
NFC card offline operation
NFC card online operation
Online monitoring
Configuration with NFC card

Power supply
External power supply 7-28VDC
Internal backup battery 3.6V (optional)

Expansion options
I2C port (optional), 2 I/O ports

Connection with patching box
Reed switch pulse or S0 bus (open collector) max. 5 imp./sec.
Hall effect sensor (optional, configurable, calibratable)
Bi-stable valve 6-12VDC (pulse-controlled)
Force-controlled valve (7-24VDC)
Electromagnetic contactor

Pulse
Configurable (e.g.,1l, 10l, 1kWh)

Display
Graphic LCD display (55mm x 18mm)

Encryption
AES-256

Antenna
Internal
SMA connector (optional)

Conformity
CE mark
R&TTE Directive 2014/53/EU

Protection class
Up to IP67

Temperature
-20°C to 55°C
-40°C to 55°C (optional)

Humidity
0 to 95%

Measurements

Control unit (without connector plug)
Height
97 mm
Width
97 mm
Depth
27 mm

Front panel
Height
150 mm
Width
150 mm

Patching box (without connector plug)
Height
90 mm
Width
35 mm
Depth
35 mm