Altronix SMP7 Quick Start Manual

Altronix SMP7 is a power supply that converts a low voltage AC input into 12VDC or 24VDC output with a 6A
continuous supply current.
Input:
• Input 28VAC

(Voltage Output/Transformer Selection Table).

Output:
• 12VDC or 24VDC selectable output.
• 6A supply current.
• Output fuse is rated 15A/32V.
• Filtered and electronically regulated outputs.
• Short circuit and thermal overload protection.
Output VDC Switch Position
12VDC
24VDC
The SMP7 should be installed in accordance with The National Electrical Code and all applicable Local Regulations.
1. Mount SMP7 in the desired location/enclosure (mounting hardware included).
2. Set SMP7 to the desired DC output voltage by setting the SW1 switch (Fig. 1a, pg. 2) to the
appropriate position (Voltage Output/Transformer Selection Table).
Adjust output voltage by using the trimpot on the power supply board (Fig. 1a, pg. 2) prior to connecting devices.
3. Connect proper transformer to terminals marked [AC] (Voltage Output/Transformer Selection Table).
Use 18 AWG or larger for all power connections (Battery, DC output).
Keep power-limited wiring separate from non power-limited wiring (115VAC / 60Hz Input, Battery Wires).
Minimum 0.25" spacing must be provided.
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.
4. Measure output voltage before connecting devices. This helps avoiding potential damage.
5. Connect devices to be powered to 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 board (battery leads included). Use two (2) 12VDC batteries connected in series for
24VDC operation.
Note: When batteries are not used, a loss of AC will result in the loss of output voltage.
Red (DC) Green (AC)
ON ON
ON OFF
OFF ON
OFF OFF
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SMP7
Power Supply/Charger

Specifications:

Voltage Output/Transformer Selection Table:
Max. Load DC
SW1 ON 6A
SW1 OFF 6A

Installation Instructions:

LED Diagnostics:

Power Supply Status
Normal operating condition.
Loss of AC. Stand-by battery is supplying power.
No DC output.
Loss of AC. Discharged or no stand-by battery. No DC output.

Overview:

Battery Backup:
• Built-in charger for sealed lead acid or gel type batteries.
• Maximum charge current 0.7A.
• Zero voltage drop when switching over
to battery backup.
Indicators:
• AC input and DC output LED indicators.
Board Dimensions (W x L x H approximate):
7" x 4.25" x 1.25" (177.8mm x 107.9mm x 31.75mm).
Transformer Requirements
(Recommended Altronix Part #'s)
24VAC or 28VAC / 175VA (T2428175)
24VAC or 28VAC / 175VA (T2428175)