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updated the TSAL-schematic

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Hamza Tamim 2025-05-05 20:46:23 +02:00
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2 changed files with 25 additions and 26 deletions
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TSAL-schematic/TSAL-schematic.pdf
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TSAL-schematic/TSAL-schematic.tex
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@ -38,28 +38,27 @@
\section{TS\_Error Latching}
See: \hyperlink{./Documents/Master_FT25.pdf.2}{AMS Master - TSAL Logic} \\
Once the state of $\overline{\mathrm{TS\_Error}}$ is reached for more then $1s$ (to prevent noise from causing an error), the latch U8 (74LVC1G74 \cite{latch_datasheet}) will be triggered.
This cannot be reset, unless a LVS power cycle is carried out. The backup pull-down resistor R9 for discharging the capacitor can also be placed if the CLR pin does not discharge fast enough.
Once the state of $\overline{\mathrm{TS\_Error}}$ is reached for more then $1s$ (to prevent noise from causing an error), the latch \texttt{U8} (74LVC1G74) will be triggered.\cite{latch_datasheet}
This cannot be reset, unless a LVS power cycle is carried out. The backup pull-down resistor \texttt{R9} is for discharging the capacitor, it can be placed if the \texttt{CLR} pin does not discharge fast enough.
\subsection{IMD Latching}
\begin{itemize}
\item The \texttt{IMD\_OK} signal is pulled high approximately 1.5 seconds after startup for the IR155-3204 IMD. \cite{imd_datasheet}
\item Therefore the Power-on Reset (PoR) lasts approximately 2 seconds.
See: \hyperlink{./Documents/Master_FT25.pdf.8}{AMS Master - SDC Latching} \\
The \texttt{IMD\_OK} signal is pulled high approximately 1.5 seconds after startup for the IR155-3204 IMD. \cite{imd_datasheet} Therefore the Power-on Reset (PoR) lasts approximately 2 seconds.
\end{itemize}
\subsection{AMS Latching}
\begin{itemize}
\item The \texttt{AMS\_OK} signal is pulled low until the following conditions are met:
\begin{itemize}
\item The AMS Master communicates with all six AMS Slaves, each providing valid voltage and temperature measurements.
\item The AMS Master communicates with the shunt sensor (IVT-S-300-U3-I-CAN2-12/24)
\end{itemize}
\end{itemize}
See: \hyperlink{./Documents/Master_FT25.pdf.8}{AMS Master - SDC Latching} \\
The \texttt{AMS\_OK} signal is pulled low until the following conditions are met:
\begin{itemize}
\item The AMS Master successfully communicates with all six AMS Slaves, each providing valid voltage and temperature measurements.
\item The AMS Master successfully communicates with the shunt sensor (IVT-S-300-U3-I-CAN2-12/24)\cite{shunt_datasheet}
\end{itemize}
\begin{center}
\begin{circuitikz}[]
% LEGEND
\draw[green!50!black] (0,2) -- ++(1,0);
\draw (1,2) node[right]{$0.13mm^2$ unshielded - RS PRO 8724476, 2A};
\draw[green!50!black] (3,2) -- ++(1,0);
\draw (4,2) node[right]{$0.13mm^2$ unshielded - RS PRO 8724476, 2A};
% IMD
\node[draw, minimum width=1.5cm, minimum height=1cm, label=above:IR155-3204] (IMD) at (0,0) {IMD};
@ -102,8 +101,8 @@ This cannot be reset, unless a LVS power cycle is carried out. The backup pull-d
See: \hyperlink{./Documents/Master_FT25.pdf.12}{AMS Master - AIR Relay State Detection} \\
The relay state is measured through a set of voltage dividers and window comparator circuits.
The \texttt{Closed} signal is used for the state detection logic (which controls the TSAL green LEDs). When the aux cable are open, it is the same as the $\overline{\mathrm{Closed}}$ state,
which will keep the green TSAL off. The "short to GND" state can be ruled out by the comparator which compares the signal with a \SI{0.3}{\volt} reference. \\
The \texttt{Closed} signal is used for the state detection logic. When the aux connection is open, it is the same as the $\neg$\texttt{Closed} state,
which will keep the green TSAL off. The "short to ground" state can be ruled out by the comparator by comparing the signal with the \SI{0.3}{\volt} reference. \\
\noindent See: \hyperlink{./Documents/Master_FT25.pdf.14}{AMS Master - Precharge State Detection} \\
@ -112,13 +111,12 @@ Here, the TS voltage on the inverter side is measured to check whether the prech
This signal is then compared with the AIR+ and precharge control signal to check if a mismatch is present.
The rule T11.9.2 does not apply here since no additional wires are used (all circuits are integrated on the PCB.)
\newpage
\subsection{TS\_Off / TSAL\_Green}
See: \hyperlink{./Documents/DC.pdf.1}{Discharge Circuit} \\
The \texttt{TS\_Off} signal (also labeled as \texttt{TSAL\_Green} in the schematics) is transmitted to the TSAL system via a dedicated wire connection.
If this wire becomes disconnected, the pull-down resistor R16 ensures that the constant current driver (IS32LT3178~\cite{driver_datasheet}) is disabled, preventing unintended LED activation. \\
If this wire becomes disconnected, the pull-down resistor \texttt{R16} ensures that the constant current driver (IS32LT3178) is disabled, preventing unintended LED activation.\cite{driver_datasheet} \\
\noindent See: \hyperlink{./Documents/dashboard-FT25.pdf.2}{Dashboard} \\
@ -130,12 +128,6 @@ All three status signals are transmitted via the CAN bus every 50~ms.
If the dashboard does not receive a valid CAN message from the AMS Master within 150~ms, it will enter a timeout condition and revert to the default LED states.
Due to the CAN protocol's built-in checksum mechanism, this timeout condition will also occur in cases of persistent data corruption.
\includepdf[pages={9,8,3}, landscape=true, link]{./Documents/Master_FT25.pdf} % SDC Latching
\includepdf[pages={5,15}, landscape=true, link, pagetemplate=9]{./Documents/Master_FT25.pdf} % Relay Driver
\includepdf[pages={2,11,12,14}, landscape=true, link, pagetemplate=9]{./Documents/Master_FT25.pdf} % TSAL
\includepdf[landscape=true, link]{./Documents/DC.pdf}
\includepdf[page={1,2}, landscape=true, link]{./Documents/dashboard-FT25.pdf}
\renewcommand\refname{Reference}
\begin{thebibliography}{00}
@ -148,4 +140,11 @@ Due to the CAN protocol's built-in checksum mechanism, this timeout condition wi
\end{thebibliography}
\end{document}
\includepdf[pages={9,8,3}, landscape=true, link]{./Documents/Master_FT25.pdf} % SDC Latching
\includepdf[pages={5,15}, landscape=true, link, pagetemplate=9]{./Documents/Master_FT25.pdf} % Relay Driver
\includepdf[pages={2,11,12,14}, landscape=true, link, pagetemplate=9]{./Documents/Master_FT25.pdf} % TSAL
\includepdf[landscape=true, link]{./Documents/DC.pdf}
\includepdf[page={1,2}, landscape=true, link]{./Documents/dashboard-FT25.pdf}
\end{document}