Johnson Controls Interiors L.L.C. RFMOD2400A Manuale Utente
User Guide Radio Module 2.4G
Issue Date March 29, 2005
© 2005 Johnson Controls, Inc.
1
Radio Module - User Guide
2.4GHz RF Transceiver Module
Figure 1: 2.4GHz Radio Module
Note: This 2.4G RF Module is designed to be used internally only in Johnson Controls
products. It is not intended to be sold as an end item by itself to external customers.
products. It is not intended to be sold as an end item by itself to external customers.
The Johnson Controls 2.4G RF Module is a single printed wiring board that implements a self contained,
complete wireless interface module. The radio section utilizes Chipcon 2420 radio chip, utilizing the
802.15.4 standard and is driven by a 16.000 MHz crystal circuit on board. The 2420 chip drives a balun
which couples the signal through transmit/receive switches to an RF amplifier delivering 15 dbm to a
reverse SMA connector for the antenna.
complete wireless interface module. The radio section utilizes Chipcon 2420 radio chip, utilizing the
802.15.4 standard and is driven by a 16.000 MHz crystal circuit on board. The 2420 chip drives a balun
which couples the signal through transmit/receive switches to an RF amplifier delivering 15 dbm to a
reverse SMA connector for the antenna.
The RF power output for the transmit amplifier is limited to 16 dbm, with a typical power output of
14dbm. The RF Module is designed to be mounted in various plastic enclosures depending on the
requirements of the product and interface protocol.
14dbm. The RF Module is designed to be mounted in various plastic enclosures depending on the
requirements of the product and interface protocol.
The RF Module is a completely self-contained radio module which has its own RF shielding. No other RF
shielding is required or implemented. It is a completely self-contained radio module which modulates its
own RF transmitter. It controls the data flow to the transmitter section compliant with FCC Part 15
requirements.
shielding is required or implemented. It is a completely self-contained radio module which modulates its
own RF transmitter. It controls the data flow to the transmitter section compliant with FCC Part 15
requirements.
There is not a hardware voltage regulator on board. Instead, the micro-controller monitors power supply voltage
on a continuous basis. Should the supply voltage be found to be outside of the normal specified operating
parameters, the unit will refuse to transmit. The unit operates within the stated FCC part 15 requirements when
operated within the specified supply voltage range.
on a continuous basis. Should the supply voltage be found to be outside of the normal specified operating
parameters, the unit will refuse to transmit. The unit operates within the stated FCC part 15 requirements when
operated within the specified supply voltage range.