Two switches series operation

Application:-Operate lamp if two-panel switches are from different two panels. Draw electrical drawing and write PLC programs using ladder diagram language.

Diagram:-Electrical wiring diagram of two switches series operation.

Explanation:-

For series operation of two switches we can use AND gate logic. Here there are two switches, panel 1 switch, and panel 2 switches. As per AND gate we need to put panel 1 switch NO contact in series with panel 2 switch NO contact as shown in the above electrical diagram.

PLC program:-

Write the ladder program for series operation using ladder diagram language. Here for ladder logic, we can use any PLC system. For PLC logic we need digital inputs and outputs.

For our application, all switches are digital inputs and the lamp is a digital output. To define digital input address and output address as per below explanation,

Digital inputs:-

Panel 1 switch=I0.0

Panel 2 switch=I0.1

Digital Output:-

Lamp=Q0.0

Memory coil:-

M=Memory bit

PLC program Explanation:-

In-network 1 we have considered two digital inputs for two switches panel 1 switch and panel 2 switch. So we have taken NO contact of panel 1 switch (I0.0) in series with panel 2 switch (I0.1) for series operation. So when both are ON, memory bit (M0.0) will be ON.

In-network 2 we have taken NO contact of memory bit (M0.0) to operate a lamp (Q0.0).