What this module is
The Siemens 6AG1960-1AA04-4XA0 is a SIPLUS S7-400 synchronization module with conformal coating, designed as a spare part based on the standard 6ES7960-1AA04-0XA0. It fits a single-width slot (25 mm) in the S7-400 rack and draws 210 mA from the backplane at maximum load. Temperature range is 0 to 60 °C at sea-level atmospheric pressure, with a pressure-altitude derating: above 2 000 m (795 hPa) the max ambient drops by 10 K, and above 3 500 m by 20 K. The absolute ceiling is 5 000 m.
Coating vs. standard variant
The core difference is the conformal coating (Class A). Electrically and mechanically, this module matches the standard 6ES7960-1AA04-0XA0 — same dimensions, current draw, and sync cable length (10 m).