Paul C Posted January 19, 2009 Share Posted January 19, 2009 Need some help, what is the pin out of the RJ2 (middle) connector on my ctb16pc board. Link to comment Share on other sites More sharing options...
Steven Posted January 19, 2009 Share Posted January 19, 2009 The middle and right connectors have the same pin out. Pin 1 is on the right.Pins 1 and 2 connect to pins 1 and 2 on the connector next to it.Pin 3 is +9v, used to power the ELL or SC485-RJ45.Pins 4 and 5 are the RS485 network pins. I don't remember which is '+' and which is '-'.Pin 6 is ground (RS485 requires a signal ground. This is also the return path for the +9v supply.)Pins 7 and 8 connect to pins 7 and 8 on the connector next to it.The pin out for the left (6-pin) connector is as follows. Pin 1 is on the right:Pin 1 is not connected.Pin 2 is ground.Pins 3 and 4 are the RS485 network.Pin 5 is +9v.Pin 6 is not connected. Link to comment Share on other sites More sharing options...
Paul C Posted January 20, 2009 Author Share Posted January 20, 2009 Thanks Steve, We were at work trying to make a rj45 to db9 connector. Found out its not as simple as that as there is some circuitry involved. Will just have to Buy one for work. Link to comment Share on other sites More sharing options...
Steven Posted January 20, 2009 Share Posted January 20, 2009 This is a bit off the LOR subject, but there is no standard for connecting a DB9 to a RJ45. If you're doing RS232 (a regular computer serial port), there are several methods, including one used by US Robotics, but I believe your best bet is the Cisco "standard".You can see a chart of the various pin outs at http://www.osburn.com/~osburn/rs232/.There is Cisco-specific information at http://www.cisco.com. Link to comment Share on other sites More sharing options...
Paul C Posted January 20, 2009 Author Share Posted January 20, 2009 We thought that the connector was strait through, when I got home and opened the one I had did I find out other wise. Link to comment Share on other sites More sharing options...
Steven Posted January 20, 2009 Share Posted January 20, 2009 Paul C wrote: We thought that the connector was strait through, when I got home and opened the one I had did I find out other wise.Are you referring to the connector that is used with LOR, like the SC485-RJ45 Serial Adapter? This has a circuit inside that converts the RS232 signal (0-5 volts unbalanced) to RS485 (-7 to +12 volts balanced). Link to comment Share on other sites More sharing options...
Paul C Posted January 20, 2009 Author Share Posted January 20, 2009 That is the one. Will have to get one for work, trying to convince the powers that be to put up lights next year. Link to comment Share on other sites More sharing options...
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