Introduction
When a Modulebus signal reflects due to an unterminated line, data errors and system instability can plague your control network. The ABB TB807 Modulebus Terminator 3BSE008538R1 solves this problem directly. This passive unit terminates the Modulebus on S800 I/O systems, preventing signal reflections and ensuring clean communication between the bus and connected modules.
Technical Specifications Breakdown
- Mechanics: S800 form factor – designed for seamless integration with ABB S800 I/O modules.
- Dimensions: Width 17 mm, Depth 13 mm, Height 19 mm – ultra-compact footprint saves cabinet space.
- Weight: 10 g – negligible addition to your assembly.
- Environmental Ratings: Operating temperature 0 to +55 °C (storage -25 to +70 °C), RH=5 to 95 % no condensation, per IEC/EN 61131-2. Pollution degree 2 (IEC 60664-1). Corrosion protection ISA-S71.04: G3. Protection class IP20 (IEC 60529).
- Certifications: CE, Electrical safety IEC 61131-2, UL 61010-1, UL 61010-2-201, Hazardous Location C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2, Marine ABS, BV, DNV, LR. EMC EN 61000-6-4 and EN 61000-6-2.
Industry Applications
- Oil & Gas Platforms: The TB807 operates reliably in hazardous areas (ATEX Zone 2, C1 Div 2) and withstands corrosive atmospheres (ISA G3), making it ideal for offshore Modulebus termination.
- Marine Systems: With ABS, BV, DNV, and LR marine certifications, this terminator suits shipboard automation where signal integrity is critical.
- Process Control: In chemical plants, the wide temperature range (0 to +55 °C) and IP20 protection allow installation inside control cabinets near reactors.
Installation & Setup Guidance
Mount the TB807 at the end of the Modulebus segment on the S800 I/O rail. Ensure the bus cable is properly inserted into the terminator’s connector. No external power is required – the unit is fully passive. Verify that the Modulebus is not overloaded with too many nodes; the TB807 only provides termination, not bus expansion.
Maintenance & Reliability
The TB807 requires no routine maintenance due to its passive design. However, periodically inspect the connector for corrosion or loose fit, especially in high-humidity or corrosive environments (ISA G3). Cleaning should follow manufacturer guidelines for IP20 equipment. The robust construction ensures long service life, reducing total cost of ownership.
Compatibility & Integration
The TB807 is designed exclusively for ABB S800 I/O systems and terminates the Modulebus. It works with any S800 I/O module that connects to the Modulebus, such as AI, AO, DI, DO, and communication interfaces. No special configuration is needed – plug and play.
Selection Guide & Purchasing Advice
Before ordering, confirm your system uses ABB S800 I/O and requires Modulebus termination. The TB807 is a passive terminator – if you need an active bus repeater, consider other ABB products. SpareTechPLC stocks the TB807 (3BSE008538R1) with fast shipping and competitive pricing. Contact us for lifecycle status and availability.
Frequently Asked Questions
What is the primary function of the ABB TB807?
The TB807 passively terminates the Modulebus on ABB S800 I/O systems to prevent signal reflections and ensure reliable data communication.
Does the TB807 require external power?
No, the TB807 is a passive unit and does not need any power supply.
Is the TB807 certified for hazardous locations?
Yes, it holds ATEX Zone 2, C1 Div 2 cULus, and C1 Zone 2 cULus certifications, plus marine approvals (ABS, BV, DNV, LR).
What are the dimensions of the TB807?
Width 17 mm, Depth 13 mm, Height 19 mm, weight 10 g.
Can I use the TB807 with non-ABB systems?
The TB807 is designed specifically for ABB S800 I/O Modulebus. It may not work with other systems due to mechanical and electrical differences.
