ABB TB820 ModuleBus Optical Modem

Product Description
The ABB TB820 ModuleBus Optical Modem is a compact device designed to extend and distribute ModuleBus communication for ABB S800 I/O systems over optical fiber networks. This modem enables high-speed communication with a transmission distance of up to 2000 meters (6600 feet), ensuring reliable data exchange in industrial automation environments. Its optical interface ensures reduced interference and noise, making it ideal for demanding applications in power generation, process control, and automation systems.

Key Specifications

Electrical Data

• Supply Voltage: 24 V DC (±20%)

• Power Consumption: Max 2.5 W

• Current Draw: 100 mA at 24 VDC

• Isolation Voltage: 500 VAC (optical to electrical)

Optical Interface

• Fiber Type: Multimode 62.5/125 µm or 50/125 µm

• Wavelength: 820 nm

• Transmission Distance: Up to 2000 m (6600 ft)

• Connector: ST type, dual-fiber

Communication

• ModuleBus Speed: 1 Mbps

• Max Units per Segment: 32 I/O modules

• Optical Budget: 15 dB (typical)

• Latency: < 1 µs per modem

Environmental Conditions

• Operating Temperature: -25 °C to +70 °C

• Storage Temperature: -40 °C to +85 °C

• Relative Humidity: 5-95%, non-condensing

• Vibration Resistance: 1 g (5-500 Hz)

Mechanical Data

• Dimensions (W × H × D): 45 × 100 × 115 mm

• Weight: ~0.2 kg

• Mounting: DIN rail, 35 mm standard

• Protection Rating: IP20