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Altronix LPS3R Installation Instructions User Manual

Lps3/lps3r - linear power supply/charger, Overview, Specifications: input

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Overview:

LPS3/LPS3R linear power supply/chargers will convert a low voltage AC input to a low voltage 12VDC/24VDC output.
These power supplies are specifically designed to provide to power needed by the most demanding security and access
control applications.

Specifications:

Input:

• 16VAC or 28VAC

(refer to voltage output/transformer selection chart).

Output:

• 12VDC/24VDC selectable output.
• 2.5 amp continuous supply current.
• Filtered and electronically regulated output.
• Thermal overload and short circuit protection.

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 (approximate):

6.5”L x 3.5”W x 1.75”H

Specified at 25˚ C ambient.

Voltage Output/Transformer Selection Table:

Output Voltage

Switch

Transformer Requirements

Position

(Recommended Altronix Part #’s)

12VDC

Closed

16VAC / 56 VA (T1656).

24VDC

Open

24VAC or 28VAC / 100VA
(Altronix model T2428100)

Note: Transformers with higher VA ratings may be used.

Installation Instructions:

The LPS3/LPS3R should be installed in accordance with The National Electrical Code and all applicable Local
Regulations.
1. Mount the LPS3/LPS3R in desired location / enclosure.
2. Set DC output voltage using switch SW2 (refer to voltage output/transformer selection table).
3. Connect proper transformer to terminals marked AC (refer to voltage output/transformer selection table).
4. Measure output voltage before connecting devices. This helps avoid potential damage.
5. Connect devices to be powered to terminals marked [ --- - DC +].
6. When the use of stand-by batteries are desired, they must be lead acid or gel type.

Connect battery to 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. Connect supervisory trouble reporting devices to outputs marked [AC Fail] (LPS3R only).

LPS3/LPS3R - Linear Power Supply/Charger

AC

DC

A

C

AC FAIL
CONTACTS

A

C

--

D

C
+
--

B

A

T

+

NC C NO

SW1
12V-CLOSED
24V-OPEN

Supervision:

• LPS3R is the same as LPS3 w/ AC Fail

supervision (Form “C” contacts.)

OPEN SWITCH

CLOSED SWITCH

Switch Detail

AC

DC

A

C

AC FAIL
CONTACTS

A

C

--

D

C
+
--

B

A

T

+

NC C NO

SW1
12V-CLOSED
24V-OPEN

Fig. 1