November 16, 2012 - CAS DataLoggers released the AirGate Modbus Wireless Gateway, which integrates GPRS technology for more complex remote monitoring applications. It also provides Cloud-based services for effective remote monitoring.
The AirGate lets users quickly integrate their new wireless technology and is ready to go right out of the box for immediate implementation. Common applications include machine monitoring, temperature-sensitive storage, and process overview. Now users can remotely monitor their critical data from anywhere in their building or a remote office, allowing faster response times to emergencies and helping to avoid potentially disastrous product loss. The AirGate-GPRS uses a Cinterion TC65i GSM/GPRS module, which is certified by AT&T. Users can select from the gateway’s 4 operation modes: Modbus Master, multiplexer, USBRS485 converter, and simple wireless RS485 extension.
Additionally, a proprietary protocol based on IEEE 802.15.4 facilitates operation in Star mode, enabling the connection of several wireless segments to the existing Modbus RS-485 network. AirGate models feature up to 16 operating channels and a maximum transmission power of 100 mW. Bright LEDs give users clear status indication.
Operating on a 10-35 Vdc power supply, the gateway can achieve an RF data rate of up to 250 Kbps and a serial port baud rate of 1200 to 115.2 Kbps. Using an operating band of ISM 2.4 Ghz and an antenna gain of 2 dBi, the AirGate's wireless range ranges out to 1000 m (3200 ft). The AirGate also includes an RP SMA female connector plug and two RS485 connectors for Modbus RTU interface.
Data collection is easy with the gateway’s Mini-B USB device. Additionally, the gateway’s wireless capability is protected by strong security, utilizing powerful AES-CBC-128 Data cryptography (Advanced Encryption Standard). The first stage of the cloud based service will route Modbus TCP packets between nodes (so that users will not require a fixed IP); this service is offered free for users with TCP/IP enabled hardware, up to a traffic and number of tags limits.