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Figure 8.1
9. CURRENT MONITOR/ALARM
The ELC-24/30-M-D battery charger includes an
integrated current monitor/alarm that monitors the
output current of the charger. If the charger output
falls below the current limit setting, a green LED
indicator is turned off and a Form C, dry contact
alarm relay is actuated. The current limit
adjustment, LED, and relay terminals are accessible
on the front of the charger (see Figure 9.1).
Figure 9.1
Relay Terminal Remote Wiring
The OPEN, COMMON, and CLOSED relay contacts
have push-in type terminals for remote wiring. The
relay contacts are rated for 1A at 30 Vdc or 0.5A at
120 Vac. A small screwdriver (3/32 inch maximum
blade width) is required to insert or remove a wire
from a relay terminal.
WARNING:
BE
CAREFUL!
IF
AN
UNINSULATED METAL TOOL CONTACTS BOTH
THE GROUNDED CHARGER CASE AND A RELAY
TERMINAL PUSH-IN TAB, THIS WILL CAUSE A
POTENTIALLY
DAMAGING
AND/OR
DANGEROUS ELECTRICAL SHORT.
Current Monitor/Alarm Operation
Table 9.1 outlines the operation of the LED and relay
based on the status of the current monitor. All relay
contact states are with reference to the terminal strip
COMMON.
Current Monitor Status
LED
CLOSED
Relay Contact
OPEN
Relay Contact
Charger output exceeds the current limit setting
On
Closed
Open
Charger output falls below the current limit setting
(and AC power is present at the charger)
Off
(after approx. 30
seconds)
Open
(after approx. 30
seconds)
Closed
(after approx. 30
seconds)
AC power is removed from the charger
Off
(immediately)
Open
(immediately)
Closed
(immediately)
Table 9.1
