TU81X Compact Termination Unit. Contact problem
- Units TU810/811 PR: B
Compact Termination Units TU810/811 PR: B has a new bus board with a modified design of its block signal tin pad. The signal contact is also redesigned to comply with the new tin pad design.
PR: B is approved for marine applications.
[ref SR8054 VASMASOITA0018 ]
- TU810 and TU811 of PR: A
In some cases the module lock operated enable signal contact on the TU810/811 MTUs has not indicated a closed condition although the module lock has been closed. The symptom is in this case that the module remains in blocked state (F LED on).
- Contact pad on the bus PCB
The root cause is unreliable functioning of the block signal contact due to too little tin solder on the pad on the Modulebus PCB. The tin pad on the bus PCB constitutes one part of the signal contact.Too little tin can cause problem.