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Chapter 2: Overview
2. Overview
2.1 Introduction
The MDR100A-R5 or MDR112A-R5 delivers high-performance wireless serial communications in a variety of network topologies.
The MDR100A-R5 or MDR112A-R5 operates within the 902–928 MHz ISM frequency bands, using frequency- hopping spread-
spectrum (FHSS) technology. It provides reliable wireless asynchronous data transfer between most equipment types that use an
RS-232, RS-422, or RS-485 interface.
The small size and superior performance of the MDR100A-R5 or MDR112A-R5 makes it ideal for many applications. Some typical
uses for this modem include:
• SCADA
• Remote telemetry
• Traffic control
• Industrial controls
• Remote monitoring
• Fleet management
• GPS
• Wireless video
• Robotics
• Display signs
• Railway signaling
2.2 Features
Key performance features of the MDR100A-R5 or MDR112A-R5 include:
• Transmission within a public, license-exempt band of the radio spectrum1—this means that the modems may be used without
access fees or recurring charges (such as those incurred by cellular airtime).
• Transparent, low-latency link providing up to 1.2 Mbps continuous throughput.
• Communicates with virtually all PLCs, RTUs, and serial devices through either an RS-232, RS-422, or RS-485 interface.
• Supports point-to-point, point-to-multipoint, store-and-forward repeater, TDMA.
• Wide temperature specification.
• Maximum allowable transmit power (1 Watt).
• Low power consumption in Sleep Mode (real-time clock wakeup).
• 32 bits of CRC, selectable re-transmission and forward error correction.
• Separate diagnostics port—transparent remote diagnostics and online network control.
• Easy to install and configure—the MDR100A-R5 or MDR112A-R5 uses a subset of standard AT-style commands, similar to those
used by traditional telephone-line modems.
2.3 What's Included
• (2) MDR100A-R5 or MDR112A-R5 Radios with power adapters and Rubber Ducky Antennas
