Product Overview
The ABB TB805 (3BSE008534R1) is a ModuleBus Cable Adaptor engineered to extend the electrical ModuleBus in S800 I/O systems. When paired with TB806 and TK801V0xx, the TB805 enables I/O modules on the same electrical bus to be mounted on different DIN rails, offering flexible cabinet layouts without compromising signal integrity. This adaptor is a critical component for distributed control system (DCS) architectures where space constraints or modular expansion demand physical separation of modules.
Technical Specifications
The TB805 delivers robust performance in demanding industrial environments. Below are the verified specifications:
| Parameter |
Value |
| Article Number |
3BSE008534R1 |
| Mechanics |
S800 |
| CE Mark |
Yes |
| 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 Certification |
ABS, BV, DNV, LR |
| Operating Temperature |
0 to +55 °C (Storage -25 to +70 °C), RH=5 to 95% no condensation, IEC/EN 61131-2 |
| Pollution Degree |
Degree 2, IEC 60664-1 |
| Corrosion Protection |
ISA-S71.04: G3 |
| Protection Class |
IP20 according to IEC 60529 |
| Mechanical Operating Conditions |
IEC 61131-2 |
| EMC |
EN 61000-6-4 and EN 61000-6-2 |
| Overvoltage Categories |
IEC/EN 60664-1 |
| Equipment Class |
Class I according to IEC 61140 (earth protected) |
| RoHS Compliance |
EU RoHS, UAE RoHS, CN RoHS |
| WEEE Compliance |
DIRECTIVE/2012/19/EU |
| Width |
22 mm |
| Depth |
25 mm |
| Height |
109 mm |
| Weight |
46 g |
These parameters confirm that the TB805 meets stringent international standards for safety, EMC, and environmental resilience.
Key Benefits & Applications
In process industries such as chemical, oil & gas, and marine, the ABB TB805 proves invaluable. It allows I/O modules to be distributed across multiple DIN rails, simplifying cable routing and improving service access. For example, in a marine engine room, the TB805's marine certifications (ABS, BV, DNV, LR) ensure reliable operation under vibration and humidity. In hazardous areas, the ATEX Zone 2 and cULus ratings make it suitable for explosive atmospheres. The compact dimensions (22 x 25 x 109 mm) and light weight (46 g) minimize panel space and mounting stress.
Installation & Setup
Mount the TB805 on a standard DIN rail (35 mm) within an IP20 rated cabinet. Connect the ModuleBus cable from the TB806 to the TB805 using the provided connectors. Ensure that the total bus length does not exceed the specified maximum for the S800 system. For optimal signal quality, use shielded twisted-pair cables and maintain separation from power wiring. The adaptor requires no additional configuration; it is a passive extension element.
Maintenance & Reliability
The TB805 has no moving parts, so maintenance is minimal. Periodically inspect the connections for tightness and check for corrosion, especially in G3 corrosive environments. The operating temperature range of 0 to +55 °C and storage range of -25 to +70 °C ensure long-term stability. Given its rugged design, the TB805 offers a long service life, reducing total cost of ownership and downtime.
Compatibility & Integration
The TB805 is designed for ABB S800 I/O systems and works seamlessly with TB806 and TK801V0xx extension cables. It is compatible with ABB's AC 800M controllers and other S800 module families. This adaptor does not require any communication protocol configuration; it simply extends the electrical ModuleBus.
Selection Guide & Purchasing Advice
Before purchasing, verify that your system uses the S800 mechanics and that the TB805 is the correct adaptor for your bus extension needs. Confirm the operating environment meets the specified temperature and hazardous area classifications. For genuine ABB parts and reliable supply, choose PLC Source PRO as your trusted industrial automation partner.