*Specified at 25˚ C ambient.
Voltage Output/Transformer Selection Table:
Output
Voltage
Switch
Position
Transformer Requirements
(Recommended Altronix Part #’s)
12VDC
ON
16VAC / 56 VA (T1656).
24VDC
OFF
24VAC or 28VAC / 100VA (Altronix model T2428100)
Installation Instructions:
LPS3/LPS3R should be installed in accordance with the National Electrical Code and all applicable
local regulations.
1. Mount LPS3/LPS3R in the desired location/enclosure (mounting hardware included).
2. Set DC output voltage using switch SW1
(Fig. 1b, pg. 2)
(refer to
Voltage Output/Transformer Selection Table
).
3. Connect proper transformer to the terminals marked [AC]
(refer to
Voltage Output/Transformer Selection Table
).
4. Measure output voltage before connecting devices. This helps avoiding potential damage.
5. Connect devices to be powered to the terminals marked [– DC +].
6. When the use of stand-by batteries is desired, they must be lead acid or gel type.
Connect battery to the terminals marked [– BAT +] on the unit (battery leads included).
Use two (2) 12VDC batteries connected in series for 24VDC operation.
7. When batteries are not used, a loss of AC will result in the loss of output voltage.
8.
LPS3R Only:
AC FAIL NC, C, NO Terminals
(Fig. 1a, pg. 2)
indicate loss of AC power. Relay is normally energized
when AC power is present. Contact rating 1A @ 28VDC. AC Fail condition will report approximately within
one (1) minute after loss of AC. Connect supervisory trouble reporting devices to outputs marked [AC Fail].
IMPORTANT:
SW2 must be in the same voltage seting as SW1.
CAUTION: Do not touch exposed metal parts.
Shut branch circuit power before installing or servicing equipment.
There are no user serviceable parts inside. Refer installation and servicing to qualified service personnel.
Input:
• 16VAC or 28VAC (
refer to Voltage Output/
Transformer Selection Table
).
Output:
• 12VDC/24VDC selectable output.
• 2.5A continuous supply current.*
• Filtered and electronically regulated output.
• Thermal overload and short circuit protection.
Supervision:
• LPS3R is the same as LPS3 with
AC Fail supervision (Form “C” contacts.)
Battery Backup:
• Built-in charger for sealed lead acid or
gel type batteries.
• Maximum charge current 500mA.
• Automatic switch over to stand-by battery.
• Fused battery protection (circuit breaker available).
• Includes battery leads.
Visual Indicators:
• AC input and DC output LED indicators.
Board Dimensions
(L x W x H)
:
7” x 4” x 2” (177.8mm x 101.6mm x 50.8mm)
LPS3/LPS3R
Linear Power Supply/Charger
Installation Guide
Overview:
LPS3/LPS3R linear power supply/chargers convert a low voltage AC input to a low voltage 12VDC/24VDC output.
These power supplies are specifically designed to provide the power needed by the most demanding security and
access control applications.
Specifications:
