caption: Symbols used in LD that represent Logic & sequence elements:
exif: {"Image DocumentName": "Symbols used in LD that represent Logic & sequence elements:", "Image ImageDescription": "Normally open contact: remains open until activated. When activated, it closes to allow current to flow. Normally closed contact: remains closed , allowing current to flow , until activated. When activated, it opens , thereby turning off the flow of current.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}