PlantLinc
PLR5000 User’s Guide
P/N 161-09888-001
DATA-LINC
Group
3
Introduction
The PLR5000 transceiver modems are high performance wireless radio modems designed for heavy-duty
industrial data communications in the 902-928 MHz license-free band. It employs advanced spread spectrum
frequency hopping and error detection technology to achieve very reliable, noise and interference immune
operation. An RF data rate of 38.4 Kbps and superior sensitivity provide ultra reliable data integrity at data
rates from 1200 to 38.4 Kbps. Full duplex operation at data rates up to 19.2 Kbps provide the fast response
times needed for polling communications. The PLR5000 has a range of up to 4 miles (6.5 km) with line-of-
sight and an omni directional antenna.
The PLR5000 can be operated in a number of different modes to satisfy a broad range of communications
requirements. It can be configured for point-to-point or multipoint operation with a unlimited number of
remote sites on a single Master depending on data throughput requirements. Repeaters can be used in the
system to eliminate dead RF zones that are blocked by obstructions.
External antennas can be used with up to one hundred feet of coax. With external antennas, radio modems can
be located inside buildings or metallic enclosures.
The PLR5000 will operate in virtually any environment where RS232 data communications are required. The
transceiver RS232 interface is a standard DB9-F connector that is configured for Data Communications
Equipment (DCE) operation. The PLR5000 will connect with a straight through RS232 cable to a device
configured for Data Terminal Equipment (DTE) operation.
The user guide covers the operating modes and configurations that are available to users of the PLR5000. It
also provides the user with bench testing instructions, technical information and specifications for the
PLR5000.
In most applications, the PLR5000 radios come from Data-Linc Group pre-configured for the application in
which they are going to be used. Generally, no other configuration is required. If you are unsure if the modem
needs further configuration, please contact Data-Linc Group.
Loop Back Bench Test
This procedure provides a simple and easy demonstration of proper operation of the Data-Linc Group
PLR5000 radio modems. The Loop Back Bench Test should be conducted to ensure system functionality
prior to actual installation, and to allow the installer to become familiar with operation of the radio modems.
A few minutes on the bench can save time in the field.
1. The PLR5000 radios that you have received are typically pre-configured by Data-Linc Group to
function as a system. No changes in configuration should be made with out first consulting the factory.
2. Attach the bench test antenna included with the radio modem.
3. Locate the PLR5000 labeled “MASTER.” Using a standard RS232 cable, connect the radio modem to a
communication port on a computer that has a communications utility such as HyperTerminal, ProComm
Plus or Terminal for Win3.x. Set the data rate (BPS) of the terminal program to match the port rate of the
PLR5000 Plug the power supply into an AC outlet of the correct voltage, and connect the power supply to
the PLR5000. The red LED marked “P” (power) on the radio modem front panel should turn on.
