The ABB TB850 serves as the primary TB850 Module Termination Unit utilized to execute physical-layer bus impedance matching across CEX-Bus platforms. Operating as a compact termination component, this hardware blocks signal reflections along the multi-drop communication tracks. The unit integrates a 25-pin DB25P male interface to establish a direct connection path with adjacent controller structures, enforcing steady signal behavior at the final physical node of the network.
Hardware Specifications
Parameter
Specification
Model
TB850
Brand
ABB
Origin
Sweden
Weight
0.04 kg
Dimensions
50 mm x 16 mm x 55 mm
Operating Temp
Factory standard industrial ambient window
Power Consumption
Passive resistor network layout
Connection Interface
25-pin DB25P male connector
Coupling Mechanism
Integrated side panel screw fixing
Cable Length
0 m
Customs Tariff Number
85369095
Industrial Control and Drives Dedicated Backplane Processing
The TB850 modifies the electrical termination state of the high-speed communication expansion bus (CEX-Bus), which interfaces directly with AC 800M controller configurations. By presenting a fixed, matched resistive load to the differential transmission tracks, the unit minimizes signal degradation to stabilize backplane bus communication velocity across the connected rack modules. This attenuation of high-frequency electrical wave noise allows the primary controller to sustain fast cyclic data exchanges and protects local data frames during dense I/O polling shifts. The module layout directly supports modular I/O density scaling options within the controller rack framework. Because it operates purely as a passive physical link interface, the terminator offers complete firmware flash compatibility, passing continuous configuration blocks and system updates to adjacent communication modules without altering data registers.
