The 6AG1591-1AB00-2AA0: This is a replacement display module for SIPLUS S7-1500 CPUs in the 35mm form factor (CPU 1511, 1513, and their F variants). Based on the standard 6ES7591-1AB00-0AA0, it adds conformal coating and an extended temperature range for use in condensing or chemically aggressive environments. The lifecycle status is NRND — Not Recommended for New Designs — meaning it's still available for replacement or ongoing production but not for new machine builds.
Temperature handling and display behavior
Rated for -40 to 70 °C horizontally, but the display panel itself shuts off at 50 °C in horizontal mounting and at 40 °C when mounted vertically. Above those thresholds the CPU continues to run, but you lose the local operator readout. If you need the display active at high ambient temperatures, this module has that limitation built in — plan for a remote HMI or rely on the CPU's web server if the installation runs hot.