Specifications

32 Rockwell Automation Publication AG-SG001G-EN-P - April 2015
Chapter 2 Choosing a Telemetry Network
Dedicated Wire
With dedicated wire modems, you can transmit and received data over a pair of
copper conductors for extended distances.
Advantages/Capabilities
• May be able to use existing installed wires
• Simplified design lowers costs
Disadvantages
• Relatively low speed
• Bit error rate dependent on quality of media
Equipment Required
• Dedicated wire modems
• Suitable wire media
Power Line
With special data communication equipment, you can transmit and receive data
over 120V AC or 460V AC power conductors within a factory.
Advantages/Capabilities
• No need for extra cabling.
• Simplified design lowers cost.
• You do not need an FCC license.
Disadvantages
• Transmission cannot occur through transformers without bridges. See the
vendor for the bridges.
• With some vendors, speed may be distance limited.
Equipment Required
• Power line or other power delivery media
• RS-232 interface