8 channels, 2 A per channel, 120/230 V AC — the thermal budget decides the real current
The 6AG1322-1FF01-7AA0 is an 8-channel digital output module from the Siemens SIPLUS S7-300 range, rated for 120/230 V AC nominal supply. Each channel delivers 2 A up to 60 °C, but at 70 °C the per-channel current drops to 1.5 A — the derating is linear between those points, so the thermal profile inside the enclosure sets the usable load, not the headline number. The zero-crossing switch (rated max 60 V) means the triac turns on and off at the AC voltage zero, which halves the inrush into lamp loads and keeps the EMI down on long cable runs. Response time is 300 ms max — fast enough for process valves and contactors, not for high-speed indexing.
EN 50155 T1 — built for rolling stock and wayside enclosures
The module carries EN 50155 T1 Category 1 Class A/B certification for horizontal mounting — this is the railway rolling-stock standard for temperature, shock, and vibration. The -40 °C minimum and 70 °C maximum span the full T1 range, so it lives in unheated wayside cabinets or engine compartments without a heater derating. Power loss is 8.6 W typical with all channels on — that heat stays inside the IP20 enclosure, so the adjacent module spacing and forced-air flow need to account for it. The 40 mm width means it takes one slot in the S7-300 rail; the 20-pin front connector (required, not included) carries the field wiring.
Diagnostics: blown-fuse detection, no wire-break
The module reports fuse-blown and missing load voltage via the group-error SF LED and the backplane bus. There is no wire-break detection — if the load drops out without blowing the fuse, the module sees a healthy channel. The green FSG LED confirms the fuse is intact; the spare fuse is 8 A quick-response, not the 2 A channel rating, so a shorted load blows the fuse before the triac.
Current lifecycle — no LTB window open yet
This is the SIPLUS extended-temperature variant of the standard 6ES7322-1FF01-0AA0; the difference is the -40 to 70 °C range and the EN 50155 T1 certification. The standard module is rated 0 to 60 °C and lacks the railway approvals, so a drop-in swap only works if the ambient stays inside the standard range.