9
Example for AC Fail Alarm Connections:
A customer wants a Green Lamp to be illuminated while the AC
power is on, and a Speaker to sound when the AC is lost. Using
customer provided equipment, they could connect an external
power supply, a speaker, and a green lamp. The lamp would
be connected to Pin 1 (
NO
contact) and the low side of the
power supply. The speaker would be connected to Pin 3 (
NC
contact) and the low side of the power supply. The high side
of the power supply would be connected to Pin 2 (
C
contact).
See Figure 8.
The
Charger Failure Alarm
occurs if the charger is not able to regulate the output voltage. This is a latching alarm.
Alarm will not clear until the charger is reset by pressing the Reset button.
The
AC Failure Alarm
will trigger and the green “AC ON” LED will turn off, after the preset delay, when the AC power
to the charger is lost. The AC Failure alarm functions as a fail-safe relay alarm; the relay will de-energize on failure
condition. The alarm will automatically reset when AC power is restored to the unit. When AC power is lost, the front
panel display and indicators will remain powered by the connected batteries. Refer to the example for AC Fail alarm
connections on Figure 7.
NOTE:
The alarm contacts for AC Fail alarm displayed in Figure 5 and Figure 6 are shown in de-energized state.
The
High DC Voltage Alarm
will trigger and the red “HIGH DC” LED will turn on, after the preset delay, if the DC output
voltage of the charger rises above the specified alarm threshold. The alarm will clear when the DC output voltage returns
to normal.
The
High DC Shutdown Alarm
will trigger and the red “HIGH DC” LED will turn on, after the preset delay, if the DC
output voltage of the charger rises above the specified alarm threshold and there is load on the charger. The display will
read “HIGH DC SHUTDOWN” the charger output will shut off, and the alarm will latch. To clear the alarm, press the
Configure/OK button on the front panel once the DC output voltage is below the alarm threshold.
NOTE:
The High DC Shutdown alarm will not trigger if there is a Low DC Current alarm present.
The
Low DC Voltage Alarm
will trigger and the red “LOW DC” LED will turn on, after the preset delay, when the DC
output voltage of the charger falls below the specified alarm threshold. The alarm will clear when the DC output voltage
returns to normal.
During engine cranking, the
Battery Fault Alarm
will trigger and the “LOW DC” and “BATT. FAULT” LED will turn on,
causing the charger output to be disabled for 100 seconds. The messages “BATTERY FAULT” and “PRESS OK TO CLEAR”
will appear on the LCD screen. The DC LOW relay contacts will be triggered per Battery Fault condition. This is a latching
alarm. To reset the alarm, press the Configure/OK button on the front panel or let it time out. After 100 seconds, the
output voltage will ramp up slowly and return to normal level. The ramp up may be manually restarted before the 100
seconds by pressing the Configure/OK button.
The
Low DC Current Alarm
will trigger, after the preset delay, when the DC current of the charger falls below the
specified alarm threshold and will reset when the DC current rises above the threshold. This alarm could be normal if no
constant loads are connected to the output of the charger or if the battery is fully charged.
The
Current Limit Alarm
LED will turn on when the DC current of the charger rises above the specified alarm threshold
and will clear when the DC current lowers below the threshold.
Alarm
Logic
AC Fail
De-Energize on Failure
Charger Fail
De-Energize on Failure
High DC Voltage
Energize on Failure
Low DC Voltage
De-Energize on Failure
Table 5 – Alarm Relay Logic
Figure 8 - Example Connections
(Customer Provided Equipment)
