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•
Overvoltage of the generated supply voltages will disable the VSYS and +15VMod circuit
breakers.
•
An I2C A/D converter and I2C temperature sensor measure the supply voltages
generated for the E-modules and the board temperature. The information is
communicated to the PMC CPU in the DC/DC board over the I2C -bus.
Figure 7
E-module interface board block diagram
Recorder assembly
The optional recorder assembly consists of a 50 mm recorder and a recorder board.
The recorder board interfaces the recorder to the module frame flex board. The recorder board
provides the following main functions:
•
It passes the recorder control signals and the serial communication lines to the recorder.
•
It has a circuit-breaker and an LC-filter for the +12 V REC supply voltage.
•
It has a step-down converter that generates the +5 V REC supply voltage for the recorder
from the +12 V received from the DC/DC board.
PDM interface
The detachable PDM docking station interfaces to the module frame flex board.
The 10-pin PDM connector provides the VSYS ePort supply voltage and the Ethernet
communication lines to the PDM module.
PSM interface
The PSM connector is part of the module frame flex board.
The PSM connector provides the +15 VMod PSM supply voltage and the RS-485 communication
lines to the PSM module.
Theory of operation
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2081903-001
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