The IEEE 802.15.4 specification is the basis of ZigBee radios, such as RFM line of ZMN modules, which provide for low-cost, low-power mesh networking. For applications that need cost and power savings but do not require mesh networking and its attendant overhead, RFM LPR24XX (1 mW RF power) and LPR24XXER (extended range with 65 mW RF power) provide excellent peer-to-peer and star topology wireless networking at 2.4 GHz in industrial and factory settings.
Each RFM 802.15.4 module is treated just like other integrated circuits, with reflow soldering to the host PCBs—there is no need for expensive, unreliable connectors. With its small footprint (0.8” x 1.2” for LPR2400; 0.8” x 1.6” for LPR2400ER), there is no size penalty associated with the convenience of a module. A RFM Networking Layer eases integration and adds support for sophisticated networks through a simple-to-use command language.
Data Sheet |
Freq. (MHz) |
Transmit Power |
Channels |
Data Rate |
802.15.4 Modules |
| LPR2400 |
2.4 GHz |
1 mW |
16 |
250 Kbps |
| LPR2400ER |
2.4 GHz |
10/100 mW |
16 |
250 Kbps |
| LPR2400ERA |
2.4 GHz |
10/100 mW |
16 |
250 Kbps |
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802.15.4 Development Kits |
| LPR24ERDK-B |
Basic development kit for the LPR2400ER module including two RS-232 serial modems, two LPR2400ER high power modules, demonstration software, power supplies, antennas, and batteries
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| LPR2400ERDK Pro |
Development kit for the LPR2400ER module including five RS-232 serial modems, two LPR2400ER high power modules, demonstration software, power supplies, antennas, and batteries
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802.15.4 Wireless Serial Data Modem
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The ZN-241G is a low-cost, 802.15.4 wireless data modem that can provide an auto-configured, wireless replacement for RS-232 cable in office environments, and can also serve as a platform for multi-drop RS-485 networks in industrial settings. Housed in a ruggedized metal enclosure, the ZN-241G replaces hard wiring in commercial environments that make wired connections challenging or impractical or that require frequent reconfiguration.
For point-to-point communications, ZN-241Gs configure the link automatically; all that’s required is plugging the devices into two serial interfaces and turning on power. Point-to-multipoint links are set up by via an included utility that simplifies the configuration of network IDs and channels, and a repeater function allows a remote node to relay data through another remote node when the direct path is blocked. The ZN-241G offers RS-232, USB, and RS-485 interface options, and operates license-free worldwide at 2.4 GHz with over-the-air data rates of up to 250 Kbps.
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ZN-241G
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(Standalone RS-232 serial 802.15.4 modem providing 100mW transmit power with included 2dB dipole antenna)
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ZN-241GSK
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(Started kit including 2 ZN-241Gs, 2 2dB dipole antennas, 2 power supplies, 2 serial cables and Windows-based configuration utility)
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ZN-241GI
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(Same as ZN-241G but with half-duplex RS-485 interface and screw terminal connections for serial data and power supply)
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ZN-241GU
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(Same as ZN-241G but with a USB interface)
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ZN-241GOEM
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(10 Pack of the ZN-241G without antenna, power supply or serial cable)
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ZN-241GIOEM
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(10 Pack of the ZN-241GM without antenna or power supply)
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ZN-241GUOEM
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(10 Pack of the ZN-241GU without antenna, power supply, or USB cable)
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