Product Overview
When long-distance communication in distributed process I/O systems demands reliable signal conversion, the ABB TB826 Optical Media Converter delivers a robust solution. This module is part of the comprehensive S800 I/O system, designed to extend the optical ModuleBus over single mode fiber. It converts between plastic or HCS opto fiber with versatile link connectors and single mode field fiber with SC connector, enabling star configurations up to 5000 m per cluster. Built in S800L mechanics and DIN rail mounted, the TB826 integrates seamlessly into existing control architectures.
Technical Specifications
The TB826 operates on a Modulebus communication protocol and functions as a slave device. It consumes a typical 24 V current of 96 mA. Operating temperature ranges from 0 to +55 °C (+32 to +131 °F), with approvals issued for +5 to +55 °C. Storage temperature spans -40 to +70 °C (-40 to +158 °F). The module is rated IP20 according to EN60529 and IEC 529, with pollution degree 2 per IEC 60664-1. It measures 85.6 mm wide, 136 mm high (including latch), and 58.5 mm deep, weighing 0.21 kg (0.46 lbs). Environmental certifications include CE marking, electrical safety per EN 61010-1 and UL 61010-1, hazardous location approvals (C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2), and RoHS compliance for EU, UAE, and CN. Corrosion protection meets ISA-S71.04: G3, and relative humidity tolerance is 5 to 95 % non-condensing.
Industry Applications
In chemical processing plants, the TB826 extends the ModuleBus over long distances, connecting remote I/O clusters to the HI Controller while maintaining signal integrity over 5000 m. For oil and gas facilities requiring hazardous location compliance, the ATEX Zone 2 and cULus approvals ensure safe operation in explosive environments. The single mode fiber conversion eliminates electromagnetic interference, making it ideal for high-noise industrial settings.
Installation & Setup Guidance
Mount the TB826 on a standard DIN rail using its S800L mechanics. Connect the plastic or HCS opto fiber to the versatile link connector and the single mode field fiber to the SC connector. Ensure the ambient temperature does not exceed 55 °C (131 °F) for horizontal mounting, or 40 °C (104 °F) for vertical mounting. Verify that the Modulebus master is configured to recognize the TB826 as a slave device. No line redundancy or hot swap support is provided, so plan maintenance windows accordingly.
Maintenance & Reliability
Periodically inspect fiber connections for dust or damage, as contamination can degrade optical performance. The TB826's IP20 protection requires installation in a clean, dry cabinet. Operating within the specified temperature range ensures long-term reliability. The corrosion protection G3 rating suits environments with moderate corrosive gases. Regular verification of the 24 V supply current (typ. 96 mA) helps detect early power issues.
Compatibility & Integration
The TB826 integrates with HI Controller systems via the Modulebus protocol. It is designed for the S800 I/O platform, supporting star topologies with up to 5000 m per cluster. Use it with ABB parent controllers and PLCs that communicate over industry-standard field buses. No module redundancy or line redundancy is offered, so single-point failure considerations apply.
Selection Guide & Purchasing Advice
Before purchasing the TB826, verify that your system requires single mode fiber conversion and supports Modulebus slave devices. Confirm the ambient temperature and hazardous location requirements match your installation. SpareTechPLC stocks the TB826 (3BSE061637R1) and can advise on compatibility with existing S800 I/O components. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
