KL3403 | Beckhoff 3-Channel Power Measurement Bus Terminal 500 V AC
Beckhoff · Cables & Connectivity
Description The Beckhoff KL3403 is a 3-channel analog input Bus Terminal designed for precise 3-phase power and energy measurement. It measures voltage, current, power, and frequency values with 16-bit resolution, supporting up to 500 V AC and 1 A inputs for accurate monitoring and energy management in automation systems. Technical Specifications Condition New/Never Used Surplus Brand Beckhoff Category Industrial Automation Part Number KL3403 Subcategory Power Measurement Bus Terminal Technology 3-phase power measurement Number of Inputs 3 × current, 3 × voltage Measured Values Current, voltage, effective power, energy, cos φ, peak values (U, I, P), frequency Measuring Voltage Max. 500 V AC 3~ (ULX-N: max. 288 V AC) Measuring Current Max. 1 A via measuring transformers (x A / 1 A) Resolution 16-bit (21-bit internal) Measurement Procedure True RMS with 64,000 samples/s Measurement Error/Uncertainty 0.5% (U, I full scale), 1% (calculated value) Update Time 50 ms per measured value (configurable) Electrical Isolation 1500 V (K-bus/field potential) Current Consumption (K-bus) Typ. 115 mA Current Consumption (Power Contacts) None Bit Width in Process Image Input/output: 3 × 16-bit data, 3 × 8-bit control/status Special Features Energy meter, power measurement, true RMS, configurable update rate Protection Rating IP20 Operating Temperature -25°C to +60°C Storage Temperature -40°C to +85°C Relative Humidity Up to 95%, non-condensing Dimensions (W × H × D) 12 mm × 100 mm × 68 mm (typical KL housing) Weight 75 g (0.17 lbs) Information About KL3403 The KL3403 belongs to Beckhoff’s KL series of Bus Terminals and serves as a multifunctional power measurement module for three-phase networks. It connects directly to voltage lines (L1, L2, L3, and N) and measures phase currents via external current transformers, providing accurate RMS values for voltage and current. The terminal calculates key power metrics including effective, apparent, and reactive power, as well as power factor (cos φ) and energy consumption per phase. Featuring 16-bit resolution and a configurable update rate of 50 ms, it ensures fast and precise energy monitoring. With 1500 V isolation between field and K-bus potentials, the KL3403 supports safe integration into industrial and energy management systems. Key Features: 3-Phase Power Measurement: Simultaneously measures three current and three voltage inputs for complete network analysis. True RMS Calculation: Utilizes a 64,000 samples/s measurement rate for accurate RMS values of voltage and current. Wide Measuring Range: Supports up to 500 V AC and 1 A input per phase via external current transformers. Comprehensive Data Acquisition: Calculates active power, apparent power, energy, and power factor (cos φ). High-Resolution Accuracy: 16-bit output resolution (21-bit internal) with <0.5% measurement uncertainty. Fast Response: Delivers configurable 50 ms update times for real-time energy management. Electrical Isolation: 1500 V isolation ensures system safety and signal integrity. Compact and Modular Design: Fits within Beckhoff’s KL Bus Terminal system for flexible fieldbus integration. The KL3403 delivers the reliability and precision required for industrial power measurement, energy management, and network monitoring applications in automation systems.
Brand: Beckhoff · Category: Cables & Connectivity
Key features
- 3-Phase Power Measurement: Simultaneously measures three current and three voltage inputs for complete network analysis.
- True RMS Calculation: Utilizes a 64,000 samples/s measurement rate for accurate RMS values of voltage and current.
- Wide Measuring Range: Supports up to 500 V AC and 1 A input per phase via external current transformers.
- Comprehensive Data Acquisition: Calculates active power, apparent power, energy, and power factor (cos φ).
- High-Resolution Accuracy: 16-bit output resolution (21-bit internal) with <0.5% measurement uncertainty.
- Fast Response: Delivers configurable 50 ms update times for real-time energy management.
- Electrical Isolation: 1500 V isolation ensures system safety and signal integrity.
- Compact and Modular Design: Fits within Beckhoff’s KL Bus Terminal system for flexible fieldbus integration.
Specifications
| Manufacturer part number | KL3403 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Beckhoff |
| Category | Industrial Automation |
| Part Number | KL3403 |
| Subcategory | Power Measurement Bus Terminal |
| Technology | 3-phase power measurement |
| Number of Inputs | 3 × current, 3 × voltage |
| Measured Values | Current, voltage, effective power, energy, cos φ, peak values (U, I, P), frequency |
| Measuring Voltage | Max. 500 V AC 3~ (ULX-N: max. 288 V AC) |
| Measuring Current | Max. 1 A via measuring transformers (x A / 1 A) |
| Resolution | 16-bit (21-bit internal) |
| Measurement Procedure | True RMS with 64,000 samples/s |
| Measurement Error/Uncertainty | 0.5% (U, I full scale), 1% (calculated value) |
| Update Time | 50 ms per measured value (configurable) |
| Electrical Isolation | 1500 V (K-bus/field potential) |
| Current Consumption (K-bus) | Typ. 115 mA |
| Current Consumption (Power Contacts) | None |
| Bit Width in Process Image | Input/output: 3 × 16-bit data, 3 × 8-bit control/status |
| Special Features | Energy meter, power measurement, true RMS, configurable update rate |
| Protection Rating | IP20 |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | Up to 95%, non-condensing |
| Dimensions (W × H × D) | 12 mm × 100 mm × 68 mm (typical KL housing) |
| Weight | 75 g (0.17 lbs) |
| Product type | Power Measurement Bus Terminal |
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