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FCC Approved RM2420 RF Communication Module Data Sheet

RAE Systems has partnered with Ember to manufacture and promote

module-level products. RAE Systems manufactures the EM2420 RF

Communications Module as the RM2420 RF Communications Module.

The RM2420 module offers a complete microcontroller/transceiver solution

Containing all hardware features necessary for development of a low-

data-rate, low-power wireless application. The primary components

include a 2.4GHz, IEEE 802.15.4 compliant Zigbee-ready transceiver

(RM2420), an 8-bit microcontroller (ATmega128L or ATmega64L), a 40-pin

interface connector, a reverse-polar SAM antenna connector, three low profile

crystals (32.768KHz, 16MHz) and power management circuitry.

The RM2420 Module is available to companies who have purchased the Ember EM2420 Developer’s Kit and it

complies with part 15 of the FCC rules.

Specifications

Frequency Band

16 channels of operation in the 2.4GHz world wide ISM band. 5MHz

channel spacing.

High Performance

RX sensitivity of better than -90 dBm at 1% packet error rate for a 20

byte payload.

Efficient

Built-in CRC and AES-128 encryption. Buffered full packet transmit and

receive. High performance SPI data and control interface operates up to

10MHz.

Power

+3.3V +

.3V from carrier board, 3.0V to 3.6V from battery pack

Microcontroller

ATmega128L (U2) or Atmega64L (U2).

Radio

RM2420 (U5)

Rx sensitivity; -94dBm (1% PER, 20-byte packet) Type

Tx power: 0dBm max

Interfaces

40-pin surface-mount RM2420 RCM header (J1)

2-pin surface-mount right-angle battery connector (J2)

Flexible

Designed for a broad spectrum of applications including IEEE 802.15.4

and Zigbee compliant devices.

Range

Line of sight range of 75 meters. Available option of a +10dBm output

amplifier for longer range transmission.

250kbps OQPSK Direct Sequence Spread Spectrum radio in

accordance with the IEEE 802.15.4 specification. 0dBm output power.

Dimensions

1 x 1.75 inches

Antenna Interface

50-Ohm reverse polar SMA

Operating Temperature Range

-40ºC to +85ºC

External Power Pin

Used to power external sensors (J1.7)

20mA max

Summary of content (5 pages)

PAGE 1
FCC Approved RM2420 RF Communication Module Data Sheet RAE Systems has partnered with Ember to manufacture and promote module-level products. RAE Systems manufactures the EM2420 RF Communications Module as the RM2420 RF Communications Module. The RM2420 module offers a complete microcontroller/transceiver solution Containing all hardware features necessary for development of a lowdata-rate, low-power wireless application. The primary components include a 2.4GHz, IEEE 802.15.
PAGE 2
Indicators Two LEDs, one red, one yellow (DS1, DS2) Specifications (continued) Operating Voltage 1.8 V (1.6 V to 2.0 V) Internal Regulator Disabled 3.3 V (2.0V to 3.6 V) Internal Regulator Enabled Current Consumption 0.5 µA Sleep 20.7 mA TX @ 0 dBm 19.7 mA RX / Idle Frequency Range 2405 to 2480 MHz Output Power -32 to +0 dBm Data Rate 250 kbps FCC ID SU3RM2420 - Complies with Part 15 of the FCC rules.
PAGE 3
Channel Frequencies These channels are equivalent to IEEE 802.15.4 channels 11 to 26. RM2420 Channel Frequencies (GHz) Pin Layout Pin 1 2 3 ATmega 128/64 Pin Name GND GND PD3 (TXD1/INT3) 4 5 nRESET PD2 (RXD1/INT2) 6 7 PG1 (nRD) +3.3V out 8 9 10 11 +3.
PAGE 4
19 NC Pin 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Dedicated for use with carrier board emulator/debug module ATmega 128/64 Pin Name Description PC6 Dedicated connection to green LED (DS3 on carrier board) for debugging purposes PB3 Master In/Slave Out SPI (used to configure the EM2420) PG2 General purpose I/O PB2 (MOSI) Master Out/Slave In SPI (used to configure the RM2420) AVCC Analog voltage reference pin PB1 (SCK) SPI clock (used to configure the RM2420) AGND Analog ground pin
PAGE 5
This device must be operated as supplied by RAE Systems. Any changes or modifications made the device RM2420 can be jeopardize, but there is one exception. The radio’s antenna can be replaced as long as the specification of the antenna matches the original (ant-2.4-cw-rcs-sma by Linx technologies).