Honeywell ST7800A1039 Purge Time Card is a 30-second purge timer accessory for Honeywell ST7800 sequence controllers, designed to set the duration of the purge phase in the controller’s operation. The card is labeled CW and uses the part number ST7800A1039. Used within the ST7800 control system, it provides a defined purge interval for repeatable startup timing of compatible systems.
