IXXAT FlexRay CCM/ FRC-EP150, Hardware Manual

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Copyright IXXAT Automation GmbH
FlexRay CCM Manual, Version 2.4
Connections
18
The following Fig. 3-8 shows the timing relation with the output signal. The trig-
ger pulse is an internal signal generated in the FlexRay CCM. The Trigger output is
connected externally to the Trigger-Out connector.
t f t r
0V
U Batt
Trigger puls
Trigger output
t w
Fig. 3-8: Trigger-Out timing
The voltage and timing parameters for the Trigger output are listed in the follow-
ing table.
Parameter Designation Value Unit of mea-
surement
U Batt Battery voltage 1.5 V
U Batt max* Maximum battery voltage* 60 V
t w Pulse width (width) typically 1 us
t f Fall time (fall) typically 5 us
t r Rise time (rise) typically 50 us
Table 3-9: Trigger-Out parameters
* The maximum operating voltage results from the electric strength of the opto-
coupler. The maximum power loss on the optocoupler and on the pre-resistor in
the device is restricted by the pulse-interval ratio.
The digital mode is used as user defined output. In this mode, the software is
able to switch the outputs into a defined state (“High” or “Low”). With a appro-
priate adaptation circuit, external loads (i.e. signal lamps, relays) can be switched
by software.