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Allen-Bradley Bulletin 1720-A1221 Series D State Logic Card features 4 AC inputs with lights and rear termination. This vintage industrial component is designed for use with CARDLOK output card racks and utilizes high threshold integrated circuitry (DTL). The unit includes the original plastic protective case and the Product Data Bulletin 1720 specification sheet.
Brand: Allen-Bradley
Model: 1720-A1221
Series: D
Type: State Logic Card
Inputs: 4 AC
Logic Type: High threshold integrated circuitry (DTL)
Power Requirement: +15V +/- 5%, 20 ma per card
Fan-Out: 10 per function
Compatibility: CARDLOK Output Card Racks
Features: Indicator Lights, Rear Terminals
Component: Printed Circuit Board (PCB)
Manufacturing: Vintage Industrial
Included: Card, Case, Data Sheet
Keywords: PLC, Industrial Automation, Vintage Electronics, Circuit Board, Retro Tech, Control System, Electrical Component, Replacement Part, Collectible Tech, Manufacturing Equipment
