User's Manual

V3d Product Specification, Version 2.06
3.1.5.3 Configuration
The minimum number of consecutive readings shall be user programmable, changeable over-
the-air through either network or locally. Also the consecutive threshold can be disabled, such
that no event message is generated.
3.1.5.4 Mounting
The enclosure mount actuator is fastened to the sea container wall at a position in line with one
particular circular bracket cutouts, corresponding to the location of the magnetic sensor located
inside the V3d cover.
3.1.6 Analog Input
3.1.6.1 Performance
The single analog input is translated to 10-bit digital representation. Furthermore, the analog
input provides for the following:
i) ESD protection (8 kV contact, 15 kV air)
iii) Circuits interface to the analog to digital converter (ADC) through a voltage conditioning
circuit, which includes individually selectable voltage divider and amplifier gain stage.
iv) Circuits are easily accessible on the SAS board in order to allow customization of the
circuits for different inputs.
3.1.6.2 Function
The sensor output shall be sampled by / reported to the microprocessor at the configurable
sensor sampling rate of range from 1 to 60 seconds, even when the V3d is in its lowest power
state. The measured value is to be compared against a stored upper and lower threshold, and
when exceeded, an event message is to be immediately generated and sent to the IMB.
The sensor is re-armed after the sensor level returns from the alarm state. At the point where
the sensor level crosses the threshold back to a typical level the sensor alarm is once again
active.
3.1.6.3 Configuration
The threshold shall be user programmable, changeable over-the-air through either network or
locally. Also the threshold can be disabled, such that no event message is generated.
The circuit enables physical customization of the inputs to adapt to varying sensors. The basic
diagram is shown below. Rectangular blocks represent spaces where SMT 1/8W resistors can
be placed (possibly 0 ohm). Production values are shown in the blocks. The translation of
voltage to the full range of 10-bit digital values at point B is to be included in subsequent design
documentation.
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