Last update: 2014/07/30 18:37
ice:oem_integration http://www.vescent.com/manuals/doku.php?id=ice:oem_integration
http://www.vescent.com/manuals/
Printed on 2019/05/01 00:16
The signals GND and GND_A are shorted together on the
circuit board through a jumper, but this can be removed.
Power Entry Via Direct Power Bus Connection
Direct power connection to the power headers on ICE
daughter modules is discouraged due to possible damage to
modules if proper power sequencing is not followed.
Power can be provided directly to the internal power bus headers if no master controller is used in the
system, but this is highly discouraged as the power requirements are much more strict in order to
prevent damaging system components. There are three power bus connectors shown in
utilize 0.1 inch double row board to board headers. The 6×2 headers (
) on
either side of the pcb carry 5V_A, +15V, +12V, -12V, -15V power rails and GND_A and GND signal.
Both of the headers must be powered by the same power rails and be connected to the same
grounds. The signal name GND_A is the return current path for the 5V_A rail which provides high
current to daughter modules which require it (such as the
). The 4×2 header (
) in the center of the pcb carries the digital communications bus and +5V_D power
rail. The 5V_D power rail is designed to provide power to noisier digital components without
contaminating the other analog power rails. This power rail can be “starred” off of the 5V_A line. All
ground connections (GND, GND_A, GND_D) are intended to be starred at the power supply. The power
sequence for turning on and off each voltage rail must be followed as described in the
or damage will occur.
Power Draw by Module
The power supply capacity for the supply used to power the ICE stack must be sized appropriately to
handle expected power draw for the modules selected. Current draw is listed in the specifications for
each of the daughter modules. The typical values indicate the quiescent current draw, and the max
values represent worst case power draw depending on the functionality of the board. For example,
the
quad temperature controller has a maximum expected current draw on the 5V_A rail that
depends on the maximum current supplied to thermo-electric coolers (TEC's). The maxiumum current
here depends on what the user sets the current limit to for each temperature controller section. The
max spec given is based on the highest current limit being set for each section, and the power supply
should be capable of supply that current unless those current limits are set lower. Another example
are the
modules, both of which include a laser current controller. The current
draw on the +15V depends on the laser current output, which has a maximum output current that can
be used to determine total current draw. This is detailed in the specifications charts on the respective
product pages for all these modules.
and ICE power bus have a maximum amount of current that can be
routed. This is specified in the
maximum power consumption specification
. When choosing how many and which type of each daughter module a master controller can
support, the expected current draw of all daughter modules must not exceed the maximum power
consumption specification for the master controller. For example, the master controller and ICE power
