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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