Manual for the Ademco 650 and 651 Series Motion Detectors, published in 1982. Document No: P4925XX, Rev: XX. Models 650 and 651. System overview, features and capabilities, and basic operation.

Manual for the Ademco 650 and 651 Series Motion Detectors, published in 1982. Document No: P4925XX, Rev: XX. Models 650 and 651. System overview, features and capabilities, and basic operation.