Alpha Technologies Spectra Series - Manual (Page 26)

Preliminary Operating Instructions 26 of 62 AIP SERVICE NUMBER 1-800-863-3364
FIGURE 10.1: SCR DRIVER BOARD
10.1.1 BACKUP CHARGER POWER
The SCR Driver Board is normally powered from the AC input power. However, if AC input power
is not present the SCR Driver Board will automatically switch to be powered from the DC batteries
as a backup power source. The SCR Driver Board includes a DC-to-DC converter that allows the
wide range of DC Battery voltage supplies to be converted to a usable 12 volt DC source. The
DC-to-DC converter has a fuse (F2) for over-current protection. This allows the charger to
monitor the charger information and provide the power supplies to the other circuit boards.
NOTE: It will not charge the batteries until AC power has returned.
10.1.2 SUMMARY ALARM BUZZER AND RELAY CONTACT CONNECTIONS
The Summary Alarm and Relay Contact Connections provide the user with two ways to monitor
for faults. See the Alarm Settings menu section for alarm setting information.
The Summary alarm buzzer and contacts will be enabled 30 seconds after the board detects a
fault code, reference FIGURE 10.1. Removing the JP3 jumper connector from pins 1 and 2 of
the JP3 connector can disable the summary alarm buzzer. When the jumper is connecting pins 1
and 2 (bottom two pins) the summary alarm buzzer is enabled. Removing the jumper from pins 1
and 2 disables the alarm buzzer. The jumper can be stored by installing it on pins 2 and 3 (top
two pins). Removing the fault code or disarming the fault code from the charger can be done
from the Alarm Settings Menu.