OG_LMD-400-R-AB_v11e Circuit Design, Inc.
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OPERATION GUIDE
GENERAL DESCRIPTION & FEATURES
General Description
The LMD-400-R (438-442 MHz & 458-462 MHz) is a synthesized multi channel transceiver module
for use under the EN 300 113 Land mobile services. This simple, compact and low power
transceiver is designed for embedding in user equipment and suitable for various low power
industrial telecontrol and telemetry applications requiring high performance and reliability.
All high frequency circuits are enclosed inside a robust housing to provide superior resistance
against shock and vibration. Using a TCXO as the reference oscillator circuit of the radio component
ensures high frequency stability in the temperature range from -20 to +60 °C.
The LMD-400-R is the same size and pin-compatible with Circuit Design’s EN 300220 compliant
license-exempt transceiver model STD-302N-R that has been widely used as a standard transceiver
for remote control in industrial radio applications.
FCC Part 90 certified US version is available in 458 - 462.5 MHz. A custom variant in the 400 MHz
band, with 4 MHz switching range is available for volume orders.
Features
Programmable RF channel with 12.5 kHz channel space
10 mW, GFSK, 4800 bps
Low power operation 3- 5.5V, 52mA/TX, 42mA/RX
High receiver selectivity & blocking
Small size 50 x 30 x 9 mm
Excellent mechanical durability, high vibration & shock resistance
Wide operation range - 20 to +60 °C
EN 300 113 compliant
Applications
Industrial remote control
Telemetry
Remote monitoring / Security
Data acquisition/ SCADA
