In some commercial and industrial data communications applications hardwiring devices together is just not practical. Long distances, inaccessibility and frequent re-location of devices are a few such applications.
Wireless Quick Facts
- The IEEE 802.11b standard sets out the specifications for a high-speed, wireless, local area network that incorporates the TCP/IP protocol stack and interfaces with Ethernet LANs. 802.11b typically uses access points to facilitate communications between multiple clients on wireless and connected wired networks.
- Radio modems provide effective solutions for short and medium-range wireless point-to-point, point to multi-point and repeater communications. Radio modems incorporate features such as ‘sleep and sniff’ modes, menu and AT command interfaces and CRC error checking.
- Tech Tip: Replace the cable between a computer and a field device with two RS-232/422/485 to Bluetooth adapters. You can configure the link for 300 bps to 920 kbps wireless communication using a PC Configuration Wizard or AT commands from the connected device.
||802.11b – 2.4 Ghz
Wireless Modems – 900 Mhz and 2.4 Ghz
|Typical Data Rates:
||802.11b – up to 11 Mbps
802.11g - up to 54 Mbps
Wireless Modems – 115.2 kbps
||802.11b – up to several hundred meters
Wireless Modems – up to 20 miles