Electromechanical relay logic Question 1: In ladder logic symbolism, an electrom

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Electromechanical relay logic Question 1: In ladder logic symbolism, an electromechanical relay coil is shown as a circle, and the contact(s) actuated by the coil as two parallel lines, almost like a capacitor symbol. Given this knowledge, interpret the following ladder logic diagram: CRI CR2 How do we know which relay contact is actuated by which relay coil? How does this convention differ from that of standard electrical/electronic schematic diagrams, wh shown as an actual coil of wire (inductor symbol) with the contact "linked" to the coil by a dashed line? Also, what type of logic function behavior (AND, OR, NAND, or NOR) does the above circuit exhibit? ere the relay coil is Question 2: There is a problem somewhere in this relay logic circuit. Lamp 2 operates exactly as it should, but lamp 1 never turns on. Identify all possible failures in the circuit that could cause this problem, and then explain how you would troubleshoot the problem as efficiently as possible (taking the least amount of electrical asurements to identify the specific problem). GRI Lamp 1 Lamp 2

Explanation / Answer

2. When switch A is On then CR1 is activated and if switch B is on then CR 2 is On. Rung 3 represents either CR1 or CR2 is on then CR3 Is on. Led 1 will be activated with the inverted logic of CR3 so if any switch is pressed then led 1 does now glow. Rung5 works as and gate

1. When swith A is pressed the first coil is excited and it will activate the contact Of CR1. It is a AND gate because when both switch is on then both contact goes high and rung output will be 1.

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