General Description:
The SM106 DC.-DC. Converter module has been designed to filter and extend a voltage
range of 20V to 50VDC vehicle battery source to a filtered 12VDC output. It is
suitable for a wide range of sensitive electronic equipment being used in harsh
electrical environments. This includes appliances such as surveillance cameras,
flat screen monitors, and GPS navigation equipment. Its size is 70mm high (including
terminals), 84mm wide and 177mm long (including the flange mount) The enclosure
features a rubber seal to prevent water ingress.
The three stage filtering system provides protection against high voltage transients
that are present in electric forklifts and large trucks.
A blend of switch-mode and linear voltage regulation ensures low power dissipation
and low output noise.
Output is fixed at 12V with a 2.5Amp continuous loading (3Amp peak loading).
An internal fuse provides over-current, over-voltage and reverse polarity protection.
A red LED lamp is present next to the output terminal to shows normal operation
when a 20-50V source of the correct polarity is provided to the input. The typical
Idle current drawn from the 20-50V source is 15ma with no load on the output.
Installation
The unit is flange mounted and has a mid two-way screw terminal that should be
connected to the + and – of the vehicle battery. Ideally this should be
a cable running directly to the battery terminals to further reduce noise and
voltage drop problems. The 12VDC output appears at the second screw terminal
strip.
Important – Where possible, the chassis or negative rail of equipment connected
to the output should not be earthed to the vehicle body. This is for noise reduction
purposes as the negative output of the module has also been filtered within the
SM106 unit.
The three stage filtering system provides protection against high voltage transients
that are present in electric forklifts and large trucks. 