7
Figure 6 – Control/Alarm Card S2A-357
Alarm Connections
Before making any connections to the ESCR ensure that the AC Power is off at the main breaker box.
Disconnect the battery from the charger via the battery disconnect breaker or manually disconnecting the
battery cables. Verify that no voltage is present by using a voltmeter at all input and output terminals.
For Charger Fail, DC High and DC Low alarm, If it is desired that the annunciator be active until the alarm
triggers connect the annunciator leads to the NC and C contacts of the desired alarm (located on the Control
Card). If it is desired that the annunciator be activated when an alarm triggers connect the annunciator leads to
the NO and C contacts of the desired alarm.
EXAMPLE for AC FAIL alarm connections
1.2.5 Auto DC Output Disable
During the engine cranking, the output of the charger will be disabled. The output will stay disabled for 100 seconds.
A message “DC LOW” will appear on the LCD screen. However, the alarm LED and the relay contacts will not be
triggered.
The Auto DC output disable feature is activated after the unit ramps up.
Figure 7 - Example Connections
(Customer Provided Equipment)
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 a 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 7.
