Which is better PLC or relay?

PLCs are much more reliable and are way easier to troubleshoot. The mechanical functions of relays simply wear out over time. Plus, the wiring required to operate a relay system is much more complicated than a PLC system. This can also cause higher costs to install and upgrade due to extra labor costs.

Is a PLC a relay?

Programmable Logic Control (PLC) is a solid-state computerized industrial controller that performs software logic by using input & output modules, CPU, memory, and others. Relay is an electro-mechanical switching hardware device (Hardware Switching Device).

Is a smart relay a PLC?

The smart relay is a small-scale PLC designed for use in industrial environments. It is also called mini PLC or logic relay in the electrical market. This intelligent logic module is the ideal controller for simple automation tasks.

What are the advantages of the PLC over the hardware relay?

What are the advantages of PLC over relay logic?

• Ability to interface / communicate with computers.
• Simple programming.
• High reliability.
• Easy maintenance.
• Rugged construction – can operate in extremely harsh conditions.
• Small size.
• Easy expandability.
• Economical in long term.

What are the disadvantages of PLC?

Disadvantages of PLC:

• There is too much work required in connecting wires.
• It has fixed circuit operation.
• PLCs manufacturers offer only closed-loop architecture.
• PLC is new technology so that should require training.
• There is a limitation of working of PLCs under high temperature, vibrations conditions.

What is difference between PLC and controller?

A PID Controller is different to a PLC. It still requires inputs and outputs to receive information from the process and send signals back to control it but it contains specialist algorithms designed to control a process with one or multiple control loops.

What is the advantage of using PLC?

Flexible in Nature: One model of PLC can be used for different operations as per requirement. Easy to install and troubleshooting: In hard wired relay based systems, installation time is more as compared to the PLC based control panels.