8. Connect 12VDC or 24VDC (depending on DIP switch setting) device to be powered to the terminals
marked [– DC1 +]. Connect 12VDC device to be powered to the terminals marked [– DC2 +] (Fig. 1, pg. 3).
9. When use of stand-by batteries is desired, they must be lead acid or gel type.
Connect battery/batteries to the terminals marked [– BAT + ] (Fig. 1, pg. 2).
12VDC operation only: Use one (1) 12VDC battery for 12VDC backup.
24VDC and 12VDC simultaneous operation: Use two (2) 12VDC batteries connected in series for
24VDC backup.
10. When batteries are not used, a loss of AC will result in the loss of output voltage.
11. Connect appropriate signaling notification devices to AC Fail & Low battery supervisory
relay outputs marked [NC, C, NO].
12. Slide [Power ON/OFF] switch to the ON position (Fig. 1, pg. 3).
Unit should be tested at least once a year for the proper operation as follows:
Output Voltage Test:
Battery Test:
Red (DC1)
Green (AC)
ON
ON
ON
OFF
OFF
ON
OFF
OFF
Terminal
Function/Description
Legend
L, G, N
Connect 115VAC/230VAC to these terminals: L to Hot, N to Neutral.
DC1 - 12VDC or 24VDC @ 3A and DC2 - 12VDC @ 1A
– DC1 +
Note: If DC2 is not used, DC1 rating is 12VDC or 24VDC rated @ 4A max.
– DC2 +
12VDC @ 1A.
AC FAIL
Indicates loss of AC power, e.g. connect to audible device or alarm panel. Relay normally
NC, C, NO
energized when AC power is present. Contact rating 1A @ 115VAC / 28VDC
Indicates low battery condition, e.g. connect to alarm panel. Relay normally energized when
Low Battery
DC power is present. Contact rating 1A @ 115VAC / 28VDC.
NC, C, NO
Low battery threshold:
– BAT +
Stand-by battery connections. Maximum charge rate 0.7A.
- 2 -
Maintenance:
Under normal load conditions, the DC output voltage should be checked for
proper voltage level.
Under normal load conditions check that the battery is fully charged, check specified
voltage (12VDC @ 13.7 or 24VDC @ 27.4) both at the battery terminal and at the board
terminals marked [– BAT +] to ensure that there is no break in the battery connection
wires. Note: Maximum charging current under discharges is 0.7A.
Note: Expected battery life is 5 years; however, it is recommended changing batteries
in 4 years or less if needed.
LED Diagnostics:
Power Supply Status
Normal operating condition.
Loss of AC. Stand-by battery is supplying power.
No DC output. Short circuit or thermal overload condition.
Loss of AC. Discharged or no stand-by battery. No DC output.
Terminal Identification:
2VDC output threshold set @ approximately 10.5VDC,
24VDC output threshold set @ approximately 21VDC.
OLS120D2X Installation Guide
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