
6
1.2.4 Standard Alarms
Four alarms are included as a standard feature of the ESCR125. The included alarms are High DC Voltage, Low
DC Voltage, Charger Failure, and AC Failure. Each alarm includes a form “C” contact, enabling the user to
connect remote annunciators. The Alarm contacts are rated for 2A at 30VDC / 0.5A @ 125VAC.
CHARGER FAILURE ALARM
occurs if the charger is unable to regulate the output voltage. This alarm relay
stays latched in until the ESCR125 charger is reset.
AC FAILURE ALARM
will trigger (after a preset delay) when the AC power to the charger is lost. The alarm
will automatically reset when AC power is restored to the charger. When AC power is lost, the front panel
display and indicators will remain powered by the connected batteries.
HIGH DC VOLTAGE ALARM
will trigger when the DC output voltage of the charger
exceeds the preset high
voltage alarm value, and will reset when the DC output voltage returns to normal. The high voltage value is
adjustable and can be set in Configuration Mode.
LOW DC VOLTAGE ALARM
will trigger when the DC output voltage of the charger falls below the preset low
voltage alarm value, and will reset when the DC output voltage returns to normal. The low voltage value is
adjustable and can be set in Configuration Mode.
Table 6 – Relay Functionality
ESCR Relay Information
Relay Function
Logic
AC Fail
De-Energize On Fail
High DC Voltage
Energize On Fail
Low DC Voltage
Energize On Fail
Charger Fail
Energize On Fail
Figure 6 –
Control/Alarm Board