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Programmable Logic Controllers
Found 2,168 products
Compact Multiprotocol I/O Module for Ethernet, 8 IO-Link Master Channels, 4 Universal Digital PNP Channels, 2 A, Channel Diagnostics, PROFINET device, EtherNet/IP device or Modbus TCP slave, Integrated Ethernet switch, Supports 10 Mbps / 100 Mbps, 2x M12, 4-pin, D-coded, Ethernet fieldbus connection, Glass fiber reinforced housing, Shock and vibration tested, Fully potted module electronics, Protection classes IP65, IP67, IP69K, M12 ports for IO-Link master, 5-pin, IO-Link master port class A an
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Passive actuator/sensor junction box, 4 ports, M12 I/O slot with terminal chamber for the supply cable, Voltage 30 V, Housing material: Nylon, Housing color: black, Protection class IP67, RoHS-compliant, CE compliant, , LED (PNP circuit), , I/O slot (pinout): 4-pin + PE
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BL compact™ fieldbus station for DeviceNet™, 4 Analog Inputs for Current or Voltage and 2 Analog Outputs for Current, On-machine Compact fieldbus I/O block, DeviceNet™ slave, 125 / 250 / 500 kbps, Two 5-pole M12 connectors for fieldbus connection, 2 rotary switches for node address, IP67, IP69K, M12 I/O connectors, LEDs indicating status and diagnostics, Electronics galvanically separated from the field level via optocouplers, 4 analog inputs for current or voltage, 0/4…20 mA or -10/0…+10 VDC (s
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Actuator and Sensor Junction Box, 4 Port, , M12 eurofast Junction Box, 4 ports, Top exit 1 1/8" minifast home run connector, Plastic housing
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BL67 base module, 1 × M12 Connector, 5-pin, Paired, , Passive connection components for sensors and actuators, Quick replacement of electronics in wired state, Mechanical coding prevents accidental plugging of the wrong electronic module, Protection class IP67, M12 connection technology, 5-pin, 2 slots, Pairwise assignment
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BL compact™ multiprotocol fieldbus station for Industrial Ethernet, 4 Analog Inputs for Current or Voltage and 2 Analog Outputs for Current, On-machine Compact fieldbus I/O block, EtherNet/IP™, Modbus® TCP, or PROFINET slave, Integrated Ethernet Switch, 10 Mbps / 100 Mbps supported, Two 4-pole M12, D-coded, connectors for fieldbus connection, 2 rotary switches for node address, IP67, IP69K, M12 I/O connectors, LEDs indicating status and diagnostics, Electronics galvanically separated from the fi
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bus node CPX-FB13 for modular electrical terminal CPX. Dimensions W x L x H: (* (including interlinking block), * 50 mm x 107 mm x 50 mm), Fieldbus interface: (* 2x M12x1, 5-pin, B-coded, * Sub-D socket, 9-pin, * Sub-D plug, for self-assembly), Device-spe
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interlinking block CPX-GE-EV-S-7/8-4POL for modular electrical terminal CPX, with system supply. Max. power supply: 10 A, Power supply: System supply, Corrosion resistance classification CRC: 1 - Low corrosion stress, Product weight: 125 g, Electrical con
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input module CPX-8DE-D With channel oriented diagnosis. Dimensions W x L x H: (* (incl. interlinking block and connection technology), * 50 mm x 107 mm x 50 mm), No. of inputs: 8, Diagnosis: Short circuit/overload per channel, Parameters configuring: (* I
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Item | Manufacturer | Price | Stock | Delivery | |
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TBEN-L4-8IOL/CS30128 Compact Multiprotocol I/O Module for Ethernet, 8 IO-Link Master Channels, 4 Universal Digital PNP Channels, 2 A, Channel Diagnostics, PROFINET device, EtherNet/IP device or Modbus TCP slave, Integrated Ethernet switch, Supports 10 Mbps / 100 Mbps, 2x M12, 4-pin, D-coded, Ethernet fieldbus connection, Glass fiber reinforced housing, Shock and vibration tested, Fully potted module electronics, Protection classes IP65, IP67, IP69K, M12 ports for IO-Link master, 5-pin, IO-Link master port class A an | Turck | Quick Quote | |||
TB-4M12-5P3-K-F/0612 Passive actuator/sensor junction box, 4 ports, M12 I/O slot with terminal chamber for the supply cable, Voltage 30 V, Housing material: Nylon, Housing color: black, Protection class IP67, RoHS-compliant, CE compliant, , LED (PNP circuit), , I/O slot (pinout): 4-pin + PE | Turck | Quick Quote | |||
BLCDN-6M12L-4AI-VI-2AO-I BL compact™ fieldbus station for DeviceNet™, 4 Analog Inputs for Current or Voltage and 2 Analog Outputs for Current, On-machine Compact fieldbus I/O block, DeviceNet™ slave, 125 / 250 / 500 kbps, Two 5-pole M12 connectors for fieldbus connection, 2 rotary switches for node address, IP67, IP69K, M12 I/O connectors, LEDs indicating status and diagnostics, Electronics galvanically separated from the field level via optocouplers, 4 analog inputs for current or voltage, 0/4…20 mA or -10/0…+10 VDC (s | Turck | Quick Quote | |||
4MB12Z-4P2-RSF120 Actuator and Sensor Junction Box, 4 Port, , M12 eurofast Junction Box, 4 ports, Top exit 1 1/8" minifast home run connector, Plastic housing | Turck | Quick Quote | |||
BL67-B-2M12-P BL67 base module, 1 × M12 Connector, 5-pin, Paired, , Passive connection components for sensors and actuators, Quick replacement of electronics in wired state, Mechanical coding prevents accidental plugging of the wrong electronic module, Protection class IP67, M12 connection technology, 5-pin, 2 slots, Pairwise assignment | Turck | Quick Quote | |||
BLCEN-6M12LT-4AI-VI-2AO-I BL compact™ multiprotocol fieldbus station for Industrial Ethernet, 4 Analog Inputs for Current or Voltage and 2 Analog Outputs for Current, On-machine Compact fieldbus I/O block, EtherNet/IP™, Modbus® TCP, or PROFINET slave, Integrated Ethernet Switch, 10 Mbps / 100 Mbps supported, Two 4-pole M12, D-coded, connectors for fieldbus connection, 2 rotary switches for node address, IP67, IP69K, M12 I/O connectors, LEDs indicating status and diagnostics, Electronics galvanically separated from the fi | Turck | Quick Quote | |||
5326867 Shield clamp CAMA-C6-SK-S2 Materials note: Conforms to RoHS | Festo | Quick Quote | |||
195740 bus node CPX-FB13 for modular electrical terminal CPX. Dimensions W x L x H: (* (including interlinking block), * 50 mm x 107 mm x 50 mm), Fieldbus interface: (* 2x M12x1, 5-pin, B-coded, * Sub-D socket, 9-pin, * Sub-D plug, for self-assembly), Device-spe | Festo | Quick Quote | |||
541248 interlinking block CPX-GE-EV-S-7/8-4POL for modular electrical terminal CPX, with system supply. Max. power supply: 10 A, Power supply: System supply, Corrosion resistance classification CRC: 1 - Low corrosion stress, Product weight: 125 g, Electrical con | Festo | Quick Quote | |||
541480 input module CPX-8DE-D With channel oriented diagnosis. Dimensions W x L x H: (* (incl. interlinking block and connection technology), * 50 mm x 107 mm x 50 mm), No. of inputs: 8, Diagnosis: Short circuit/overload per channel, Parameters configuring: (* I | Festo | Quick Quote |
Programmable Logic Controllers
General Guide & Overview
Programmable Logic Controllers (PLCs) are digital computers used in industrial organizations to control computer systems. They monitor inputs and make decisions about related outputs, making them an essential component in predictive maintenance systems. PLCs have a rich history, with the first one being developed by Dick Morley in 1968. Over the years, PLC technology has evolved, from physical relays and timers to PC-based software.
PLCs can be classified into different types, such as PLCs, PACs, SCADA, DCS, and DDC, each serving specific automation needs. They consist of key components, including inputs, outputs, CPUs, communications, and HMIs. PLCs operate through a scan cycle, continuously monitoring inputs, executing control programs, and controlling outputs.
Different programming languages, such as ladder logic, structured text, instruction list, function block diagram, and sequential function chart, are used to program PLCs. Compact and modular PLCs offer flexibility and scalability. PLC maintenance is essential for optimal performance, with tasks such as cleaning dust, replacing modules, and checking connections.
Types and Components of PLCs
Programmable Logic Controllers (PLCs) come in various types, each designed to meet specific automation needs. Two main types of PLCs are compact PLCs and modular PLCs. Compact PLCs are integrated single-unit systems with the processor, power supply, and I/O modules all housed together. They are ideal for smaller applications due to their smaller physical footprint. On the other hand, modular PLCs offer flexibility and scalability, allowing for easier system expansion. They are often preferred by larger or growing companies that require more extensive control.
A PLC consists of several critical components that work together to perform its function. These components include inputs, outputs, CPUs, and communication capabilities. Inputs are connected to sensors and devices to gather data and information. The gathered data is then processed by the CPU, the brain of the PLC, which evaluates and makes decisions based on the input. The output devices, connected to outputs, control various components such as valves and motors to execute the desired actions.
PLCs also have communication capabilities, enabling integration with other devices and systems in the industrial environment. This ensures seamless coordination and interaction between different elements of the automation system. PLCs are an essential part of automation systems, providing reliable control and efficient operation across various industries.
PLC Maintenance Best Practices
Proper PLC maintenance is crucial for ensuring optimal performance and minimizing breakdowns. By following a comprehensive PLC maintenance checklist, you can keep your system running smoothly and prevent costly downtime.
Here are some important PLC maintenance tasks:
Cleaning dust from input and output devices to prevent signal interference and component failure.
Changing filters regularly to control dust accumulation and maintain proper ventilation within the PLC system.
Inspecting connections for secureness to avoid loose connections that can disrupt communication and reduce reliability.
Replacing worn-out modules to prevent malfunctions and ensure accurate processing of data and commands.
Increasing awareness of unusual activity by monitoring error logs and system performance to identify potential issues before they escalate.
Backing up PLC data regularly to protect against data loss in the event of a system failure or unexpected event.
Monitoring environmental conditions such as temperature and humidity to ensure they are within the specified operating range.
Calibrating devices periodically to maintain accurate measurements and prevent deviations that can impact system performance.
Conducting visual inspections of the PLC system to identify any physical damage, loose connections, or signs of wear and tear.
Checking LED lights for proper functionality, as they provide valuable diagnostic information.
Inspecting sensors to ensure they are clean, properly aligned, and functioning correctly, as they are critical for accurate data acquisition.
Addressing electromagnetic interference by keeping sensitive components and wiring away from sources of electromagnetic radiation.
Reviewing the proximity of equipment to identify potential interference and ensure proper positioning for efficient operation.
Keeping the PLC system up to date with recalls and upgrades to benefit from the latest software patches, enhancements, and security updates.
The frequency of maintenance tasks may vary depending on factors such as the surrounding environment, machine usage, and available maintenance staff capacity. It is recommended to perform daily tasks such as dusting and tidying, while more specific tasks can be scheduled at regular intervals or based on manufacturer recommendations.
FAQ
What is a programmable logic controller (PLC)?
A programmable logic controller (PLC) is a digital computer used in industrial organizations to control computer systems. It monitors inputs and makes decisions about related outputs, making it an essential component in predictive maintenance systems.
Who invented the first PLC?
The first PLC was developed by Dick Morley in 1968.
How do PLCs work?
PLCs operate through a scan cycle, continuously monitoring inputs, executing control programs, and controlling outputs.
What are the different types of PLCs?
PLCs can be classified into types such as PLCs, PACs, SCADA, DCS, and DDC, each serving specific automation needs.
What are the key components of a PLC?
The key components of a PLC include inputs, outputs, CPUs, communications, and HMIs.
What programming languages are used for PLCs?
Different programming languages, such as ladder logic, structured text, instruction list, function block diagram, and sequential function chart, are used to program PLCs.
What are the advantages of PLCs?
PLCs offer advantages such as flexibility, scalability, easy expansion, integration with other devices and systems, and improved processing speeds.
Where are PLCs used?
PLCs are used in various industries, including manufacturing, automation, oil and gas, energy, and transportation.
How important is PLC maintenance?
PLC maintenance is crucial for ensuring optimal performance and avoiding breakdowns. Regular tasks include cleaning dust, replacing modules, and checking connections.