SECO LARM USA Power Supply ST LA105 TTQ User Guide

Installation Manual  
®
ENFORCER  
ST-LA105-TTQ  
ST-LA110-TTQ  
Voltage Converters  
Introduction:  
The ENFORCER Voltage Converter is a low voltage step-down voltage converter. It converts low voltage AC or  
DC to one of three different regulated DC outputs. It is useful for CCTV DC cameras, access controls, as well  
as many other applications where low DC voltage is required.  
Features:  
• Selectable 5, 12, or 24 VDC output via jumper.  
• Built-in overload protection.  
• Adjustable voltage output to compensate  
for voltage drop.  
• Regulated and filtered output.  
• Output current protection:  
• Dual-color LED power output indicator:  
– Red indicates 5/12 VDC output.  
– Blue indicates 24 VDC output.  
• Green power input LED indicator.  
– 0.5 Amp for ST-LA105-TTQ  
– 1.0 Amp for ST-LA110-TTQ  
Specifications:  
Installations:  
Output voltage:  
1. Remove the cover by simultaneously pressing the  
2 indented slots located on the side of the cover.  
5/12/24 VDC (pre-set 12 VDC), selectable by jumper  
8~30 VDC/VAC for 5 VDC  
15~30 VDC/VAC for 12 VDC  
24~30 VDC/VAC for 24 VDC  
Input voltage:  
2. Set the desired output voltage to 5, 12, or 24 VDC.  
See table 3. The factory default output setting is  
12 VDC.  
500mA@5/12/24 VDC  
ST-LA105-TTQ:  
Output current:  
500mA@24 VDC  
1A@5/12 VDC  
ST-LA110-TTQ:  
Power input LED (green)  
Power output LED (red for 5 or 12 VDC, blue for 24 VDC)  
LED indicators:  
3. Connect the output wires from the power supply to the  
power input terminal blocks. See specification chart  
for the power requirements. Turn on the power of the  
power supply.  
PTC (Positive Temperature Coefficient)  
(500mA for ST-LA105-TTQ, 1A for ST-LA110-TTQ)  
Current protection:  
Connector:  
Overload protection:  
Terminal blocks  
Built-in  
1
31  
29  
2
32  
32  
/
(46 x 50 x 23.5 mm)  
Size:  
1 / x 1 /  
x
4. Use table 2 to check the LED status for the input  
and output voltage.  
Table 1: Adjustable voltage output chart  
5. To avoid potential damage, use a voltage meter  
to check if the voltage reading at the input and  
output terminal blocks is correct.  
Adjustable voltage range  
Output voltage  
5 VDC  
12 VDC  
24 VDC  
4.5 ~ 5.6 VDC  
12.2 ~13.5 VDC  
23.0 ~25.2 VDC  
Observe correct polarity.  
Note: 1. Use between 16 AWG and 26 AWG wire  
for the input and output terminal blocks.  
2. Use the included SECO-LARM DC pigtail  
connector for easy installation.  
Table 2: LED indicator chart  
LED colors  
Green  
Indications  
Input power is connected.  
Output voltage is 5 or 12 VDC.  
Output voltage is 24 VDC.  
Red  
Blue  
6. Connect device to the power output terminal blocks.  
7. If the output voltage is low, then turn the rotary  
knob clockwise to increase the voltage or counter-  
clockwise to decrease the voltage.  
Table 3: Output voltage selection chart  
Output  
Jumper Setting  
Voltage  
A
B
C
D
Note: If the output voltage set by the jumper is  
higher than the input voltage, then the output voltage  
reading will be the same as that of the input voltage.  
5 VDC  
12 VDC  
24 VDC  
8. Replace the plastic cover on the voltage converter  
and secure it in the desired location.  
 

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