DC AUDIOVISUEL SMO Power Station Front Panel
DC AUDIOVISUEL SMO Power Station Front Panel
DC AUDIOVISUEL SMO Power Station Rear Panel
DC AUDIOVISUEL SMO Power Station Rear Panel
DC AUDIOVISUEL SMO Power Station Remote Control
DC AUDIOVISUEL SMO Power Station Remote Control
In a nutshell

SMO is a centralised power station for professional 12 V DC powered sound equipments. As primary source, SMO uses whether a 110 to 220 V AC power supply or one of two 12 V batteries. Power input is universal, 90-260 V AC, 47-63 Hz. Battery input connectors are set on front panel, for easier handling. Currently, SMO is designed for 12 V lead batteries, 12 AH each. However, DCA workshop can, on request, adapt SMO to different capacities and, very soon, to different battery types.

SMO is provided with 13 V internal power supply, delivering 150 W primary power, dispatched on five outputs:
- Output #1: 13 Volts, 30 Watts (ie 2,3 A) for recorder (Cantar-X, PD-6, PD4, Deva II or IV or V, aso)
- Output #2: 15 Volts, 30 Watts (ie 2 A) for desk mixer (Sonosax SX-S, SX-ST, Cooper CS 106 or CS 108, aso)
- Output #3: 12 Volts, 20 Watts (ie 1,7 A) for radio mikes, receivers or transmitters (Audio LTD, Sennheiser, Zaxcom, Lectrosonics, aso)
- Output #4: max. 2 A, from 11 to 13 Volts depending on battery load, or on AC power connexion of SMO.
- Output #5: several available options, to be specfied during SMO assembly: 12 or 15 V, 15 or 20 W (extra audio equipment); 16.5 V or 24 V, 50 or 75 W (notebook); or else, similar to #4 output, unregulated, 2 A max. (lighting, video, accessories).

These five outputs are set on rear panel, with standard XLR4F connectors. All outputs under 15 V are on pin 1 (-) and pin 4 (+). Optionnal output #5 (over 15 V) is wired between pin 1 (-) and pin 3 (+) to protect equipment unexpectedly plugged.

Outputs 1, 2, 3 and 5 are floating-mass converter outputs, which assures for constant output voltage, whatever battery capacity (charged or discharged), or AC power presence. This also assures for a very small number of interferences, audible or not, between internal powering sources. It also allows powering of reversed tension devices (Nagra type) without any risk of loop effect or short-circuit.

A sturdy low-size remote control allows setting off SMO controls to user direct view.
With remote control, it is possible to:
- turn ON or OFF each of the five outputs. As DC / DC converters are high quiescent current consuming, even with no output, it is important to turn on only necessary outputs in order to optimize system autonomy when powering from battery.
- display each output status via LED indicator switch: light off = "disabled"; green light = "ON and OK"; red light = "ON but faulty", meaning overheating, overload or short-circuit on this output gone into self protection mode (0 V).
- display AC power presence via red "AC On" LED, enabled even when SMO is off.
- display primary power supply (AC power or battery) on LCD.
- and, soon, to display on same LCD remaining battery capacity.

Our recommendations

- It is necessary to use large section cables from batteries to SMO and from SMO to equipment.
- One must plug remote control to SMO, before connecting SMO to AC power and switching it on; otherwise, malfunction could occur.
- SMO is not waterproof and must be properly ventilated, for there are neither noisy fans, nor heavy radiators.

This product is commonly named:

DC Audiovisuel SM0, DC Audiovisuel S.M.0., DC Audiovisuel S-M-0, DCAudiovisuel SM0, DCAudiovisuel S.M.0., DCAudiovisuel S-M-0, DCA SM0, DCA S.M.0., DCA S-M-0, SM0, S.M.0., S-M-0

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