ABB|TB820| ModuleBus Optical Modem

Description

The ABB TB820 ModuleBus Optical Modem is a compact device designed to extend and distribute ModuleBus communication in ABB’s S800 I/O system over optical fiber networks.

Features

• Converts electrical ModuleBus to optical signals.
• Supports redundant and non-redundant configurations.
• Enables long-distance communication.
• Provides diagnostic LEDs for status monitoring.
• Compatible with S800 I/O modules.

Technical Specifications

Electrical Data

• Supply Voltage: 24 VDC (±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 to +70°C.
• Storage Temperature: -40 to +85°C.
• Relative Humidity: 5-95%, non-condensing.
• Vibration Resistance: 1 g (5-500 Hz).

Mechanical Data

• Dimensions: 45 mm (W) x 100 mm (H) x 115 mm (D).
• Weight: Approximately 0.2 kg.
• Mounting: DIN rail, 35 mm standard.
• Protection Rating: IP20.

Diagnostics

• LED Indicators: Power, communication, fault status.
• Fault Detection: Signal loss, power failure.
• Max Cable Length: 10 m (electrical ModuleBus side).