AC IN The LED turns ON when the AC input voltage is sufficient to start the unit. This is
guaranteed to occur when the input voltage has risen to 85 Vac, but it could occur
at a lower voltage, depending on output loading and unit-to-unit variations. Once
the unit starts, the LED remains ON through the entire AC input voltage range.
The LED will turn OFF at the point where the power supply shuts down. For a fully
loaded supply, this is guaranteed not to occur until the input voltage descends
below 85 Vac. This voltage can be considerably lower, if the unit is lightly loaded
and depending on unit-to-unit variations. The unit does not shut down when the
AC input range is exceeded unless there is a failure in the power supply.
Status The LED turns ON when output voltage is within the operating range. The LED
turns OFF when the DC voltage is increased to above 26.4 Vdc and the power
supply shuts down due to an over-voltage condition. (Based on manufacturer's
- 567 -
Chapter 17 - Series C Power Sub-System Connections and Alarm Indications
Chapter 17 - Series C Power Sub-System Connections and Alarm Indications
LED Name Functional Description
tests, the actual data range for over-voltage is 26.4 to 30 Vdc.) The LED turns OFF
during output overload, which is reached when the load is increased to over 26 A
and results in the unit shutting down.
Main Battery Backup Charger/Regulator/Monitor Indicators
Status The LED turns ON when both the input and battery voltages are within operating
range. The LED will remain ON until the battery reaches the Low-Voltage Drop-out
point (32 Vdc) and the unit turns OFF along with the LED (output will still be
regulated at 25 Vdc during battery discharge). The LED turns OFF when the
battery voltage is above 45.5 Vdc. (Based on manufacturer's tests, the actual data
range for over-voltage is 45.5 to 48.5 Vdc.)
Battery
Charged
The LED operation is based on both battery charge voltage and battery charge
current. The battery charge voltage must be above 40 Vdc and the battery charge
current must be below 1 A for the LED to be ON. If both of these conditions are not
met, the LED will be OFF
