PLC Module

Product Specifications

Technical details and manufacturing context for PLC Module

Definition

A PLC Module is a key component housed within a System Control Cabinet, designed to execute discrete control tasks as part of a larger PLC system. It interfaces with sensors, actuators, and other modules to process input signals, execute programmed logic, and generate output commands for machinery and processes. Its role is critical for implementing automation sequences, monitoring system states, and ensuring operational reliability in industrial environments. The module typically consists of a printed circuit board (PCB) with semiconductors, housed in a plastic enclosure with metal connectors. It supports a range of I/O configurations, from 16 to 512 points, and operates with a CPU clock speed between 100 and 400 MHz. Program memory ranges from 64 to 512 KB, allowing for user programs and data storage. Digital inputs accept 24 V DC (±10%) per IEC 61131-2, while digital outputs provide 0.5 to 2 A per channel for driving actuators. Analog input resolution is 12 to 16 bits for precise measurement. The module is designed for industrial environments, with an operating and storage temperature range of -40 to 85 °C (per IEC 60068-2-1/2), relative humidity of 5 to 95% non-condensing (per IEC 60068-2-78), and a degree of protection from IP20 (cabinet) to IP67 (field mounting) per IEC 60529. Supply voltage is 24 V DC (±10%) per IEC 61131-2, with power consumption between 5 and 20 W depending on I/O count and load. Dimensions are typically 120 x 90 x 60 mm (W x H x D), and weight varies from 0.5 to 1.5 kg. These specifications are reference ranges; actual values must be confirmed with the manufacturer for the specific model and application.

Working Principle

The module operates by receiving electrical signals from field devices (e.g., sensors, switches) via its input circuits. A central processing unit (CPU) within the PLC executes a user-programmed logic routine stored in memory. Based on this logic, the module processes the input data and activates its output circuits to control connected devices (e.g., motors, valves). Communication with other modules or systems is typically handled through dedicated bus or network interfaces. The module's input circuits condition signals to acceptable levels, the CPU performs logic operations, and output circuits drive actuators with appropriate current and voltage. The module continuously scans inputs, updates outputs, and communicates status, ensuring real-time control. It is designed for modular expansion, allowing systems to scale from small to large applications. The operating principle relies on deterministic execution of the user program, with cycle times dependent on CPU speed and program complexity. Proper configuration of I/O points, memory, and communication parameters is essential for reliable operation.

Common Materials

Printed Circuit Board (PCB), Semiconductors (ICs, transistors), Plastic housing, Metal connectors

Technical Parameters

Parameter	Typical range	Notes & selection driver
Number of I/O Points	16–512 points	Determines the scale of the control system.
CPU Clock Speed	100–400 MHz	Faster speed for complex logic and high-speed processing.
Program Memory	64–512 KB	Capacity for user program and data.
Digital Input Voltage	24 ±10% V DC	Standard for industrial sensors and switches.IEC 61131-2
Digital Output Current	0.5–2 A	Per channel, for driving actuators.
Analog Input Resolution	12–16 bit	Higher resolution for precise measurement.
Operating Temperature	-40–85 °C	Extended range for harsh environments.IEC 60068-2-1/2
Storage Temperature	-40–85 °C	Non-operating condition.IEC 60068-2-1/2
Relative Humidity	5–95 %	Non-condensing.IEC 60068-2-78
Degree of Protection	IP20–IP67	IP20 for cabinet, IP67 for field mounting.IEC 60529
Supply Voltage	24 ±10% V DC	Typical industrial DC supply.IEC 61131-2
Power Consumption	5–20 W	Depends on I/O count and load.
Dimensions (W x H x D)	120 x 90 x 60 mm	Typical for modular PLC.
Weight	0.5–1.5 kg	Varies with I/O configuration.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Terminal Block
Provides secure electrical connections for field wiring to the module's input/output circuits

Material: Plastic with metal contacts
Status LEDs Part
Visual indicators for power, communication activity, and input/output state

Material: Plastic lens
Connector Part
Interface for backplane communication and power distribution within the PLC rack

Material: Metal with plastic housing
Input Circuit
Takes field signals down to logic levels and isolates them before the CPU reads them.
Output Circuit
Drives contactors, valves and motors at the current and voltage they need.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

System Control Cabinet

View system integration details

Automated Control Panel

View system integration details

Manufacturers of PLC Module

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Shenzhen Chentuo Technology Co., Ltd.

Shenzhen, Guangdong, CN

Also makes: Variable Frequency Drive, Frequency Converter

Listed on the company's own website · profile compiled by CNFX from public sources

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Frequently Asked Questions

What is a PLC module used for?

A PLC module is a component of a programmable logic controller system that handles specific control tasks, such as reading sensor inputs, executing logic, and driving actuator outputs in industrial automation.

What are the typical I/O point ranges?

The number of I/O points typically ranges from 16 to 512, depending on the module configuration. The exact number should be confirmed with the manufacturer for the specific model.

What standards apply to this module?

Relevant standards include IEC 61131-2 for digital input and supply voltage, IEC 60068-2-1/2 for temperature, IEC 60068-2-78 for humidity, and IEC 60529 for degree of protection. Compliance must be verified with the manufacturer.

Can the module be used in harsh environments?

The module is designed for industrial environments with an operating temperature range of -40 to 85 °C and protection up to IP67 for field mounting. However, actual suitability depends on the specific model and installation conditions.

Data Basis

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Preliminary Technical Classification

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pressure:	N/A (electronic module, not fluid handling)
other spec:	Humidity: 5-95% non-condensing, Vibration: 5-500 Hz at 2G, Shock: 15G for 11ms
temperature:	-20°C to +60°C (operating), -40°C to +85°C (storage)

Product Specifications

Applied To / Applications

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Application Fit & Sizing Matrix

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