40 Recorder Signal Connections ...........................................................................40 Signal Switching Output Board (P/N 6-02499C)...............................................42 O-1 Volt Signal Switching Output Board...........................................................44 Remote Electronic Track & Hold Boards (P/N 7-00839A) ............................... 46 Plug-In Track & Hold Board (P/N 6-02499E) ....................................................47 Alarm Signal