Part 2

6 1 6 Example 3497A ConfigurationsEXAMPLE 16HIGH VOLTAGE SWITCHINGDESCRIPTIONA primary application for the High Voltage Actuator assembly (Option 11 5) is toswitch high voltage loads. Since the actuator can handle voltages up to 250V RMSat 2 amps, it is ideally suited for switching line voltages to items such as airsolenoids, pilot lights and motor starters. With the Option 11 5 assembly, you canconnect up to eight inputs per assembly or 40 inputs per 3497A. This exampleshows how to use the high voltage actuator to control (turn on) motor starters.PROCEDUREA typical application for the high voltage actuator is to control (turn on) motorstarters. Although the actuator can directly switch motors up to 34 horsepower, therange of motors it can handle can be greatly increased by using motor starters. Theactuator can be used to control the motor starter, essentially supplying the signalsto turn the starter on.For this example, an assembly process requires that three 80 horsepower rnotorsbe turned on by using motor starters, according to the following sequence. MotorA is started at time t = 0 (by motor starter A), runs for 5 minutes and is then turnedoff by an external circuit. At t+ 5 minutes, motor B is started, runs for 6 minutesand is then shut off. Then, at t+ 11 minutes, motor C is started, runs for 4 minutesand is stopped, completing the cycle.I MOTOR CHANNEL MOTOR RUN SEQUENCEI STARTER NUMBER TIME (MINUTES) NUMBERCONFIGURATIONFigure 203 shows a simplified block diagram and typical connection diagram. Forthis example, motor starters are connected to channels 0, 1 and 2 of an assemblyin slot 2. Although a specific contact protection network is not shown, you shouldconsult Chapter 8, Option 11 5 , Contact Protection Guidelines, before running theprogram shown to ensure that appropriate contact protection is provided.Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com