This Siemens 6AG1222-1HH30-2XB0 is a 16-channel relay output module for the S7-1200 family, rated from -40°C to 70°C so it'll survive a hot panel or a chilly warehouse. Each relay switches 5–250 V AC or 5–30 V DC at up to 2 A resistive or inductive, and 30 W DC / 200 W AC on lamp loads. Out here in the grease, that temperature range is what keeps a line running when the cabinet's next to a furnace or a freezer door.
What the ratings mean for fit
The 2 A per channel (resistive or inductive) is the continuous limit; don't push past it. The lamp load rating of 30 W DC or 200 W AC tells you how much inrush it handles. Coil draw is 11 mA per relay from L+, plus 135 mA from the 5 V backplane bus. No internal short-circuit protection — you must fuse each output group externally. The dielectric strength between channels in groups of 4 is 750 V AC for 1 minute, so channel-to-channel isolation is solid for mixing voltages.
Compliance documentation
This module carries both CE marking and FM approval — two common requirements for machinery panels shipped into Europe or the US. CE indicates conformity with applicable EU directives; FM covers factory mutual approval for general industrial use. You'll find the CE declaration and FM certificate with the Siemens documentation package. No RoHS/REACH/UL statements are on the record, but CE includes RoHS compliance by reference.
Mounting and wiring
Width 45 mm, height 100 mm, depth 75 mm — sits on the S7-1200 rail. Requires a front connector (sold separately). IP20 rated — fine inside a cabinet, not for washdown. The module has diagnostic alarm and status LEDs for each output, so a quick glance tells you if a channel is on or faulted. Shock and vibration: rated for a 0.3 m drop five times in its package; once mounted it's DIN-rail secured.