LD3400 EATON

LD3400 EATON Digital Input Module

Product  Description：

A Digital Input (DI) Module is specifically engineered to read the ON/OFF or TRUE/FALSE status of external industrial devices. These devices typically include pushbuttons, selector switches, limit switches, proximity sensors, and temperature switches. The module converts the physical electrical signal received from the field device (e.g., $24 \text{ V}_{\text{DC}}$ or $120 \text{ V}_{\text{AC}}$) into a digital signal that the PLC's Central Processing Unit (CPU) can process as a binary 1 or 0. EATON's DI modules often feature optical isolation between the field wiring and the internal module electronics to protect the PLC from power surges or electrical noise. They are typically available in various channel densities, such as 8-point, 16-point, or 32-point modules, and are designed to be easily mounted onto a backplane or DIN rail, allowing for flexible system expansion and configuration.

Product Parameters

Key technical specifications for EATON Digital Input Modules include:

• Input Voltage Range: Specifies the acceptable voltage levels for the input signals, commonly $24 \text{ V}_{\text{DC}}$ (sourcing or sinking) or $120/240 \text{ V}_{\text{AC}}$.

• Number of Channels (Points): The count of individual input signals the module can handle, such as 8, 16, or 32.

• Input Current: The minimum current required to reliably register an input state change.

• Response Time (Filtering): The speed at which the module can detect a change in the input state, often adjustable via software filtering to prevent false triggering from contact bounce.

• Isolation Type: Typically channel-to-channel or group isolation for electrical protection.

• Wiring Type: Often utilizes screw terminals or spring-cage terminals for secure field connections.

• Power Consumption: The amount of current the module draws from the backplane or system power supply.

Product Advantages

EATON Digital Input Modules provide several key advantages for industrial control systems. Their robust electrical isolation ensures maximum protection for the sensitive PLC circuitry from harsh industrial electrical environments. The high channel density available in many modules helps minimize the physical footprint and total system cost. They offer fast and reliable signal acquisition, ensuring the PLC receives accurate real-time data from the field devices for timely control actions. Many EATON modules feature diagnostic capabilities, such as LED status indicators for each input point, which significantly simplify commissioning and troubleshooting by allowing quick visualization of the input status.

Important Considerations (Precautions)

When installing and operating EATON Digital Input Modules, users must adhere to critical precautions. Verify the compatibility of the input voltage and current of the field device with the module's specified ratings to prevent damage to either component. Ensure correct wiring polarity for $24 \text{ V}_{\text{DC}}$ modules (sourcing/sinking) to match the sensor type and the module's requirements. Properly terminate unused input channels according to the manufacturer's recommendations to avoid potential noise interference. Due to the module's sensitivity to electrical noise, use properly shielded cables for field wiring, especially in noisy environments, and maintain separation between low-voltage signal cables and high-voltage power cables.

Product Applications

Digital Input Modules are fundamental to nearly every automated system. Their applications are widespread, including:

• Machine Control: Monitoring the status of safety gates, emergency stop buttons, and limit switches to ensure safe machine operation.

• Process Monitoring: Reading the level status (high/low), pressure switch status, and temperature limits in tanks and pipelines.

• Conveyor Systems: Detecting the presence and position of products using proximity or photoelectric sensors.

• Building Automation: Reading the status of doors, windows, and fire alarm contacts.

• Automated Assembly: Monitoring the completion of steps or the presence of components during an assembly sequence.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.