Solid State Relay (SSR)

Solid State Relays are semiconductor equivalents of the electromechanical relay and can be used to control electrical loads without the use of moving parts. Just like a normal electro-mechanical relay, SSR’s provide complete electrical isolation between their input and output contacts with its output acting like a conventional electrical switch in that it has very high, almost infinite resistance when nonconducting (open), and a very low resistance when conducting (closed). Solid state relays can be designed to switch both AC or DC currents by using an SCR, TRIAC, or switching transistor output instead of the usual mechanical normally-open (NO) contacts.

Makes: OMRON, AUTONICS, FUJI, CRYDOM, UNISON, MULTISPAN, FOTEK, PHOENIX, CARLO GAVAZI, CROUZERT

2.COUNTER

A Counter is a device that counts the number of objects or the number of operations. It is called a Counter because it counts the number of ON/OFF signals input from an input device, such as a switch or sensor. It is fairly simple for people to count ten or twenty objects, but larger numbers make counting increasingly difficult. Counters outperform people when it comes to counting accurately. Preset Counters, Totalizing Counters, Time Counters and Electromagnetic Counters. A Preset Counter counts until the present value reaches a preset value, and then it activates a control output to operate an output device. The term preset in Preset Counter means that you can set a value in advance. A Total Counter does not output a control signal.

Make : OMORN, AUTONICS,KUBLER

3.Connecting cables

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1.The communication between a PLC (Programmable Logic Controller) and an HMI ( Human-Machine Interface) typically involves exchanging data to facilitate monitoring, control, and visualization of industrial processes. This communication serves to provide real-time data from the PLC to the HMI for display and interaction, as well as to send control commands from the HMI to the PLC for process control. There are several methods and communication protocols used for PLC-HMI communication.

2.Serial Communication:

• 1) RS-232: This is a standard serial communication protocol commonly used for short-distance communication between a PLC and an HMI. RS-232 typically involves direct wired connections between the PLC and HMI using serial cables.


• 2) RS-485: RS-485 is another serial communication protocol used for longer-distance communication between multiple devices, including PLCs and HMIs. RS-485 allows for multi-drop communication, enabling several HMIs to communicate with one or more PLCs on the same network.

3.Ethernet Communication:

• 1. Ethernet/IP: Ethernet/IP is a widely used industrial protocol that allows for fast and efficient communication between PLCs, HMIs, and other industrial devices over Ethernet networks. It is an open protocol that is supported by many PLC and HMI manufacturers.


• 2. Modbus TCP: Modbus TCP is a protocol based on the Modbus communication protocol, which is commonly used for communication between PLCs and HMIs over Ethernet networks. It is a simple and widely supported protocol that allows for easy integration of devices from different manufacturers.

4. Fieldbus Communicatio

• PROFIBUS: PROFIBUS is a fieldbus protocol commonly used for communication between PLCs, HMIs, and other industrial devices in process automation and manufacturing systems. It provides high-speed communication and supports real-time data exchange.


• DeviceNet: DeviceNet is another fieldbus protocol used for communication between PLCs, HMIs, and devices such as sensors and actuators in industrial automation systems. It is a low-cost and easy-to-use protocol suitable for simple control and monitoring applications.

5. Middleware/Software Communication:

• Some PLC and HMI systems may use middleware or software applications to facilitate communication between the PLC and HMI. These middleware solutions often use standard communication protocols such as OPC (OLE for Process Control) or MQTT (Message Queuing Telemetry Transport) to enable data exchange between the PLC and HMI.

Overall, the type of communication between a PLC and an HMI depends on factors such as distance, speed, complexity, and compatibility with existing systems. The choice of communication method and protocol should be based on the specific requirements and constraints of the industrial application.

Servo motors connectors, Servo motor encoder cables,Servodrive cables, Plc programming cables, Power cables.

4.Contactor

A contactor is an electrically controlled switch that's used to open and close an electrical power circuit. Contactors are often used in industrial and commercial settings to control motors, lighting systems, and other electrical loads. They can handle higher currents than standard relays, which are used for low current switching.

Makes: Schneider, Fotek, Siemens, Fuji.