Displaying 1 result from an estimated 1 matches for "12volts".
2012 Feb 26
1
Server Does Not Shut Down
...While replacing the power supply (because that is what smoked) I decided to rebuild the microcontroller. It is complete however I cannot get the AC present and low battery to work properly. It uses a standard serial port with simple relay switching.
I made a simple device to apply either +12 or -12volts to both pin 1(DCD) and pin 8 (CTS) to help me understand the correct handshake but I am very confused.
Here is a table of what I get:
StatePin 1Pin 9Note?What I understand it means
1+12V+12VOLOn Line -?normal operation.
2-12V+12VLB OLI don't understand this. It should be On Battery.
3+12V-12...