ABB EHDB280-21-11
ABB EHDB280-21-11 - Image 2

ABB EHDB280-21-11

Product Introduction:
The ABB EHDB280-21-11 is a specialized communication interface module designed for Powermonitor 3000 series digital instruments. It provides dual-port communication capabilities, enabling seamless integration of power monitoring devices into complex industrial automation and energy management networks.

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Category: SKU: ABB EHDB280-21-11

Description

ABB EHDB280-21-11

Technical Specifications:

  • Communication Ports: Dual-port interface providing two effective communication channels.
  • Port 1 Protocol: DeviceNet network interface.
  • Port 2 Protocol: RS-485 based DF1 protocol.
  • Measurement Update Rate: 40 to 50 milliseconds.
  • Sampling Rate: 90 samples per electrical cycle.
  • Data Recording: Supports up to 45,000 trend records and 50 recordable events.

Functional Features:

  • Dual Network Connectivity: Allows simultaneous connection to a DeviceNet control network and a legacy RS-485 DF1 data collection system.
  • Centralized Configuration: The main module sets all required communication configuration parameters for both ports.
  • Event Tagging: Records system measurements and events with precise time tags, including date, time, and hundredths of a second.
  • Software Upgradability: Firmware can be upgraded without opening the module or removing it from the switchgear.

Application Scenarios:

  • Industrial, commercial, and residential power system integration.
  • Power and Energy Management Systems (PEMS) for real-time data acquisition.
  • Substation automation and motor control center (MCC) monitoring.

Performance Parameters:

  • Relay Outputs: Equipped with 2 standard 250 V DC output relays for alarm or control signaling.
  • Setpoints: Features 10 configurable setpoints for automated control via relays or PLCs.
  • Harmonic Analysis: Capable of calculating Total Harmonic Distortion (THD) and passing IEEE 519 harmonic quality tests.

Material Composition & Structural Features:

  • Display Module: Constructed using non-brominated, FDA-approved plastics, making it suitable for pharmaceutical, food processing, and fire-safe control rooms.
  • Mounting: Designed for direct installation on switchgear panels without the need for custom enclosures.

Working Principle:
The microprocessor-controlled module continuously samples voltage and current waveforms, processes the data into electrical parameters, and packages this information into DeviceNet and DF1 telegrams for transmission to master controllers and SCADA systems.

Installation Requirements:

  • Insert the communication card securely into the designated slot on the Powermonitor 3000 base unit.
  • Connect DeviceNet and RS-485 cables using appropriate shielded twisted-pair wiring.

Usage Precautions:

  • Ensure proper termination resistors are installed on the RS-485 DF1 network to prevent signal reflection.
  • Verify DeviceNet MAC ID and baud rate settings match the network configuration before energizing.

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