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.4,�XREDJACKET. CPT Controller Manual <br /> Basic Components of a CPT Controller ' <br /> This section describes the basic components of a CPT Controller <br /> and parts of the system. <br /> Controller <br /> The CPT Controller has three light-emitting diodes (LEDs) on the <br /> front—green, yellow, and red. (See the section called "LED <br /> Functions"in chapter 5 for more details.) A piezo,or audible alarm, <br /> is attached to the controller along with a key slot for resetting the <br /> alarm and a push button to quiet the sound. <br /> �► <<r s <br /> PIEZO <br /> ALARM <br /> LEDs <br /> QUIET RESET <br /> BUTTON c` KEY <br /> 7;, <br /> FIGURE 2.1 FRONT OF CPT CONTROLLER <br /> The CPT Controller has a normally open, dry contact rated at <br /> 120 VAC and 4 amps. This dry contact activates only for line-leak <br /> hard faults; it may also be used as an auxiliary warning device. <br /> (See the `Troubleshooting"section for a description of faults.) <br /> The CPT Controller is a metal enclosure that contains three circuit <br /> boards. All three boards are on a rack that can slide out for easy <br /> access. Each is described below. <br /> Chapter 2: Red Jacket CPT Controller 2-2 ARE260-240 Rev.A ♦ 6/97 <br />