Description, Data guide – Linx Technologies TRM-915-R250 User Manual
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Description
The 250 Series RF transceiver module is
designed for reliable bi-directional transfer
of serial data over distances of up to 4 miles
(6.4km) line of sight. Operating in the 902 to
928MHz frequency band, the module is capable
of generating +23.5dBm into a 50-ohm load
and achieves an outstanding typical sensitivity
of –105dBm. This high output power gives
the module exceptional range and also helps
overcome noisy environments at shorter ranges.
The module implements a Frequency Hopping Spread Spectrum (FHSS)
protocol along with networking and assured delivery features. It has a
Universal Asynchronous Receiver Transmitter (UART) serial interface that
can be directly connected to microcontrollers, RS-232 converters or USB
adaptors. The module automatically handles all radio functions resulting
in a UART-to-antenna wireless link. All configuration settings and data are
accessed through the UART interface.
Features
• True UART to antenna solution
• Frequency Hopping (FHSS)
• 153.6kbps max RF data rate
• Includes robust protocol (CSMA,
assured delivery, addressing)
• Low Power Standby, Sleep and
Deep Sleep modes
• Adjustable output power
• 32-bit unique address
• 5 volt tolerant I/O
Applications
• Direct RS-232/422/485 Wire
replacement
• Asset tracking
• Automated meter reading
• Industrial/home automation
• Wireless sensors
• Remote data logging
• Fleet management
• Traffic and display signs
• Mass-transit communications
• Oil and gas sensing
• Long-range data links
TRM-915-R250
RF Transceiver Module
Data Guide
Figure 1: Package Dimensions
Revised 3/18/2015
1.200”
(30.48mm)
1.200”
(30.48mm)
0.170”
(4.32mm)
A large-print version of this document is available at
www.linxtechnologies.com.