Originally posted by Station Specialties:
The KSU has B Batt. Take your but sett and listen for it.
If this is a KSU 551 or greater they all have B battery.
This is how we wire the buzzers. 18-24 b batt.
Hmmm
If it has a B battery, then all the documentation I have is wrong. The power supply schematic shows one 24 vdc output, one 18 vac output, and one 10 vac output. The 24 volt output runs directly to the AB terminal. Also, nowhere in any of the 50 pages or so of documentation is a B battery ever mentioned. Buzzers are fed from the 10 or 18 vac outputs, the lamps are fed from the 10v output.
