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DI801-eA Digital Input Module

1. Product Title

DI801-eA Digital Input Module (Industrial-Grade High-Speed Digital Signal Acquisition for Automation Systems)

2. Product Data

The DI801-eA is an industrial-grade digital input module designed to collect and process high-speed digital signals from industrial sensors, switches, and other digital devices in automation control systems. It features 8 independent digital input channels, supporting both sinking (NPN) and sourcing (PNP) input types for flexible compatibility with diverse field devices. With a high input response time of ≤1ms, it captures fast-changing digital signals (e.g., from proximity sensors, limit switches) with minimal delay. The module provides 2.5kVrms isolation between channels and from the backplane, preventing ground loops and electromagnetic interference (EMI) in noisy industrial environments. Compatible with mainstream industrial communication protocols (Profinet, Modbus-TCP), it is widely used in manufacturing automation, process control, and machinery monitoring systems requiring reliable digital signal acquisition.

3. Product Description

This module adopts a compact DIN rail-mountable design (35mm standard rail) for space-efficient installation in control cabinets. It integrates surge protection (2kV ESD, 4kV EFT) on each channel to withstand transient voltage spikes common in industrial environments, ensuring long-term reliability. The front panel features LED indicators for each channel (input status: ON/OFF) and a module power indicator, enabling quick visual confirmation of signal status and system health. It supports hot-swappable installation (with compatible backplanes), allowing replacement without powering down the entire system—minimizing downtime in critical applications. The operating temperature range of -25℃~+70℃ ensures stable performance in harsh conditions (e.g., dusty factories, high-temperature workshops), and it complies with international standards (IEC 61131-2, EN 61000-6-2) for industrial EMC and safety.

4. Detailed Parameters

Parameter Category	English Parameters
Number of Input Channels	8 independent channels
Input Type	Configurable for sinking (NPN) or sourcing (PNP)
Input Voltage Range	24V DC (15V~30V DC tolerance)
Input Current	3mA~10mA (at 24V DC)
Response Time	≤1ms (ON to OFF and OFF to ON)
Isolation	2.5kVrms (channel-to-channel, channel-to-backplane)
Surge Protection	2kV ESD (IEC 61000-4-2), 4kV EFT (IEC 61000-4-4)
Power Supply	24V DC (±10% tolerance)
Power Consumption	≤5W (full load)
Operating Temperature	-25℃~+70℃
Storage Temperature	-40℃~+85℃
Protection Class	IP20 (module body)
Installation Method	35mm standard DIN rail mounting
Dimensions (L×W×H)	120mm×80mm×35mm (typical)
Compliance Standards	IEC 61131-2, EN 61000-6-2 (EMC), UL 508

5. Advantages & Features

① High-Speed Response: ≤1ms response time captures fast digital signals accurately; ② Flexible Compatibility: Supports both NPN and PNP input types for diverse field devices; ③ Robust Isolation & Protection: 2.5kVrms isolation + surge protection resists industrial noise and transients; ④ Hot-Swappable Design: Enables maintenance without system shutdown, reducing downtime; ⑤ Easy Monitoring: Channel-specific LEDs provide real-time input status for quick troubleshooting.

6. Application Fields

① Manufacturing Automation: Acquisition of signals from proximity sensors, limit switches, and emergency stop buttons in production lines; ② Process Industry: Monitoring of valve position switches, pump run/stop status, and pressure switches in chemical plants; ③ Machinery Monitoring: Detection of motor overload relays, bearing temperature switches, and safety interlocks in industrial machinery; ④ Material Handling: Signal collection from conveyor belt sensors, pallet position switches, and lift limiters in logistics systems; ⑤ Building Automation: Monitoring of door contacts, fire alarms, and equipment status in smart building control systems.

7. Precautions

① Ensure input voltage matches 24V DC (15V~30V range) to prevent damage to input circuits; ② Configure input type (NPN/PNP) correctly to match field devices—incorrect configuration will cause signal failure; ③ Separate routing of input signal lines from high-voltage power lines to avoid EMI-induced false signals; ④ When performing hot-swap, follow system procedures to prevent transient current spikes; ⑤ Avoid installation near strong magnetic fields or high-temperature sources (>70℃) to maintain performance; ⑥ Regularly check terminal connections—loose contacts may cause intermittent signal loss or false triggers

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DI801-eA Digital Input Module

DI801-eA Digital Input Module

1. Product Title

2. Product Data

3. Product Description

4. Detailed Parameters

5. Advantages & Features

6. Application Fields

7. Precautions

ABB

DI801-eA

PLC modules

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