The Siemens 6ES7960-1AA00-5AA0 is a factory-terminated fiber-optic synchronization cable for the S7-400H redundant automation system. It links the two CPUs in a high-availability pair, keeping the control programs and process images in lockstep. At 1 m, it is the shortest standard length, sized for CPUs mounted in the same rack or adjacent racks. The part is explicitly marked as a replacement part for the original S7-400H fiber-optic link, so if you are swapping an older sync cable on a line-down S7-400H, this is the direct drop-in. No rewiring, no adapter — it plugs straight into the CPU's fiber-optic port.
At 40 g and 1 m, this cable is light and short — it fits inside a standard S7-400H rack without excess loop that would block airflow or snag on adjacent modules. The fiber-optic connectors are the same duplex type used across the S7-400H family, so it mates with any CPU 414-4H, 416-5H, or 417-5H without adapters.