TB820

Overview

• Product Name: TB820
• Description: ABB ModuleBus Modem
• Power Input: 24 V d.c. (19.2 - 30 V)
• Power Consumption: 100 mA

Power and Performance

• Power Dissipation: 6.0 W
• Power Supply Monitoring Inputs:
  • Max. input voltage: 30 V
  • Min. input voltage for high level: 15 V
  • Max. input voltage for low level: 8 V
• Power Output (ModuleBus):
  • 24 V max. = 1.4 A
  • 5 V max. = 1.5 A

Connectivity and I/O

• Electrical ModuleBus: Maximum of 12 I/O modules
• Optical ModuleBus:
  • Fiber optic interface
  • Two transmitters and two receivers
  • Maximum of 7 I/O clusters
  • Max. 10 Mbit/s
  • Wavelength: 650 nm

Environmental Specifications

• Maximum Ambient Temperature: 55°C (131°F)

Configuration and Design

• Optical Configuration:
  • Simplex: Optical ModuleBus nodes in a ring
  • Duplex: Optical ModuleBus nodes in a row
• Parts:
  • Module termination board
  • Power supply/communications board

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