SECTION I. DESCRIPTION AND USE OF OPERATOR'S
CONTROLS AND INDICATORS
2.1 OPERATOR CONTROLS AND INDICATORS.
The Alarm-Monitor Group (AMG) OA-9431/FSS-9(V) is controlled by a user furnished IBM-PC/AT compatible computer
with a keyboard, color monitor and dot matrix printer. The operator controls and indicators can be divided into four
groups which are the Uninterruptible Power Supply (UPS), Converter Multiplexer Assembly (CMA), computer, and J-
Figure 2-1. UPS Controls and Indicators.
2.1.1 Controls and Indicators UPS. The UPS (figure 2-1) provides the AC power for the CMA and computer. The
UPS controls and indicators are listed with a description in table 2-1.
Table 2-1. UPS Controls and Indicators.
AC LINE INPUT BREAKER
Switches main power input from on to off. When
off, removes power from UPS input lines. Power is
still available at input terminals. Provides
current protection to UPS.
INVERTER OUTPUT BREAKER Provides current protection. When current exceeds
rated current, removes output power.
Switches battery power from on to off. When on
and ac power is not available, applies 72 V dc
output from batteries to inverter until batteries
decrease below 61 V dc.