Direct from the Signalist Website:
Signalist DP8 – Dapol semaphore adaptor
See the DP8 manual for more information.
The SC1 and DP8 combination will operate eight Dapol semaphore arms, maintaining synchronisation with your signal control system at all times – even during power down. A button is provided for each signal on the DP8 for initial synchronisation.
The DP8 also contains a flexible power source to enable you to power your Dapol signals from 12V-18V DC or the DCC track supply as well as the usual 16V AC
The SC1 and DP8 combination is half the cost of competing products making it the obvious choice for Dapol signal control by DCC.