The EP programmers offer the following selectable functions: increase purge timing, require the air flow switch (terminals 3-P) to be open at the start of the operating cycle, recycle or non-recycle operation (EP300 series only), and intermittent or interrupted operation of terminal 6 (EP300 series only). The EP programmers include an RJ45 style connector to interface with the ED510 display module (mounted local or remote) and two (2) RJ style connector to connect to an E500 communication interface wired in a multi-drop configuration. The EP programmers store the burner cycle and on-time history, as well as lockout history (with burner cycle and burner hour time stamp).