ABB YXD 126 4890024-UN/2 Digital Input Module

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Product Description

The ABB YXD126 4890024-UN/2 Digital Input Module is designed for industrial automation systems to acquire and monitor digital input signals.
It receives discrete input signals from field devices such as switches, sensors, and relays, converting them into standard logic levels for processing by the central control unit.

The YXD126 module is built for reliability and noise immunity, providing stable signal acquisition even in harsh industrial environments. It is widely used in power generation, process automation, and manufacturing industries.

Technical Specifications

• Model: YXD126

• Part Number: 4890024-UN/2

• Manufacturer: ABB

• Type: Digital Input Module

• Power Supply: 24 V DC (±10%)

• Power Consumption: Approx. 5 W

• Input Type: Digital Input (DI)

• Number of Channels: 16 channels

• Input Voltage Range: 0–30 V DC

• Input Current: Approx. 7 mA (typical)

• Logic Levels:

  • Logic “1”: > 15 V

  • Logic “0”: < 5 V

• Response Time: < 5 ms

• Signal Isolation: Optical isolation ≥ 1500 V RMS

• Interface: System backplane connector

• Operating Temperature: 0°C to +55°C

• Storage Temperature: -25°C to +70°C

• Relative Humidity: ≤ 90% (non-condensing)

• Protection Class: IP20

• Dimensions: Approx. 160 × 100 mm

• Weight: Approx. 0.3 kg

• Mounting Type: Slot / Modular rack mount

Features & Advantages

1. High Accuracy Input Acquisition: Reliable and fast response for all digital signals.

2. Excellent Noise Immunity: Optical isolation ensures clean and stable input data.

3. Modular and Expandable: Easy installation and system expansion.

4. Industrial-Grade Durability: Performs well in high-interference environments.

5. LED Indicators: Each input channel has individual LED status indicators.

6. System Compatibility: Fully compatible with ABB Procontrol, Advant, and AC800M systems.

7. High Reliability: Long service life and high MTBF rate.

8. Low Power Design: Energy-efficient without compromising performance.

Application Fields

• Power plant and substation automation systems

• Industrial process control and monitoring

• Robotic and electromechanical systems

• Chemical, metallurgical, and paper industries

• Automated manufacturing and machinery control

• Electrical monitoring and remote I/O systems

Precautions

1. Always power off the system before installation or maintenance.

2. Use anti-static protection when handling the module.

3. Ensure correct wiring and voltage levels.

4. Use shielded and grounded cables to prevent interference.

5. Avoid operation under high temperature or humidity.

6. Regularly inspect terminal connections for looseness or corrosion.

7. Only use ABB-certified software and diagnostic tools.

8. Keep the module clean and well-ventilated.

The structure and details of the product：

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