Posted 9/16/2007 15:57 (#204646 - in reply to #204323) Subject: the serial (9-pin) ports are trhe same on both models
Sunnyvale, CA
The 9 pin serial ports on the EZ-Guide 500 and EZ-Guide Plus have the same pinout. when connecting to a PC they both require a F-F null modem. If a null modem is needed for one of them, then it will be needed for the other.