Solving Modulebus Signal Integrity Issues
When a Modulebus network lacks proper termination, signal reflections can cause data errors and intermittent communication failures. Engineers need a reliable, passive solution to ensure clean signal transmission. The ABB TB807 Modulebus Terminator addresses this pain point directly.
Introducing the TB807 Modulebus Terminator
The ABB TB807 (3BSE008538R1) is a passive unit designed specifically for termination of the Modulebus in ABB S800 I/O systems. It belongs to the S800 mechanics family and provides a simple, robust way to complete the bus line. This compact component helps maintain signal integrity without requiring external power or active circuitry.
Technical Specifications and Certifications
The TB807 carries CE marking and complies with electrical safety standards IEC 61131-2 and UL 61010-1, as well as UL 61010-2-201. For hazardous locations, it holds C1 Div 2 cULus, C1 Zone 2 cULus, and ATEX Zone 2 certifications. Marine certifications include ABS, BV, DNV, and LR, making it suitable for offshore and shipboard applications.
Operating temperature ranges from 0 to +55 °C, with storage from -25 to +70 °C, and relative humidity of 5 to 95% non-condensing per IEC/EN 61131-2. The device offers pollution degree 2 per IEC 60664-1 and corrosion protection per ISA-S71.04: G3. Its protection class is IP20 according to IEC 60529, and it meets EMC requirements EN 61000-6-4 and EN 61000-6-2. Overvoltage categories follow IEC/EN 60664-1, and the equipment class is Class I per IEC 61140 (earth protected). RoHS compliance covers EU RoHS, UAE RoHS, and CN RoHS, while WEEE compliance follows DIRECTIVE/2012/19/EU.
Compact Dimensions and Lightweight Design
Measuring just 17 mm wide, 13 mm deep, and 19 mm high, the TB807 occupies minimal space on the DIN rail. Its weight of only 10 g makes it easy to handle and install. This small footprint allows engineers to add termination without crowding the cabinet.
Applications in Harsh and Regulated Environments
In a typical chemical processing plant, the TB807 terminates the Modulebus in an S800 I/O rack located in a Zone 2 hazardous area. Its ATEX Zone 2 and C1 Div 2 certifications ensure safe operation in potentially explosive atmospheres. The corrosion protection rating G3 also suits environments with aggressive chemical vapors.
For marine applications, such as on an offshore drilling platform, the TB807's ABS, BV, DNV, and LR certifications guarantee compliance with major classification societies. Engineers can rely on this terminator to maintain communication integrity in salt-laden, high-humidity conditions.
Compatibility with ABB S800 I/O Systems
The TB807 integrates seamlessly with ABB S800 I/O modules and baseplates. It terminates the Modulebus at the end of the I/O chain, preventing signal reflections. Users simply plug it into the designated termination position on the last baseplate in the series.
Business Value and Reliability
By ensuring proper bus termination, the TB807 reduces the risk of communication errors that can cause production downtime. Its passive design means no power consumption and virtually zero maintenance. The wide range of safety and environmental certifications also simplifies compliance for global installations.
Why Choose CtrlTechDaily for the TB807
CtrlTechDaily stocks the ABB TB807 Modulebus Terminator and can support your industrial automation needs. We provide genuine ABB products with traceable part numbers. Contact us to verify current lifecycle status and availability before ordering.
Frequently Asked Questions About the TB807
What is the primary function of the ABB TB807?
The TB807 is a passive unit used for termination of the Modulebus in ABB S800 I/O systems. It prevents signal reflections and ensures reliable data communication.
What certifications does the TB807 hold for hazardous locations?
The TB807 carries C1 Div 2 cULus, C1 Zone 2 cULus, and ATEX Zone 2 certifications. These allow its use in potentially explosive atmospheres.
What are the dimensions and weight of the TB807?
The TB807 measures 17 mm in width, 13 mm in depth, and 19 mm in height. It weighs only 10 g.
Is the TB807 compliant with RoHS and WEEE regulations?
Yes, the TB807 complies with EU RoHS, UAE RoHS, and CN RoHS. It also meets WEEE compliance per DIRECTIVE/2012/19/EU.
What is the operating temperature range for the TB807?
The operating temperature range is 0 to +55 °C, with storage from -25 to +70 °C. Relative humidity can be 5 to 95% non-condensing.
