Explain the purpose of each of the three sets of relay contacts (A, B, and C) in
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Explain the purpose of each of the three sets of relay contacts (A, B, and C) in Figure 7–22.
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3 Audible alarm Magnetic detection switches 9V = B 2 tele Relay coil System ON/OFF FIGURE 7-22 Simplified security alarm system. 10 120 V ac Wall switch House lights
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The three sets of relay contacts in Figure 722 are Set A These contacts are normally closed NC When ...View the full answer
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