I just upgraded my EZ-500 to RTK and that part is working well.  I decided to get a keypad so I don't have to stand up to engage the autosteer every time I come to the end of the row.  However, the Trimble RTK radio is already plugged into the 9-pin port on the EZ500.  Then I realized when I combine beans, I need that port to send the GPS signal from the EZ to the Agleader monitor.  This would be 3 different things that need to be plugged into that port simultaneously.  Is this even possible?  Should I take the keypad back before I even get it out of the box?

Thanks.