What it is and what it fits
The Siemens 6AG1134-4NB51-2AB0 is a current-production RTD input module for the ET 200SP distributed I/O system. It accepts Pt100, Ni100, Pt1000, Ni1000, and other common resistance thermometer types. Rated for ambient operation from -25 °C to 60 °C, this module fits standard ET 200SP base units without backplane derating.
Key specs that matter for panel integration
Width is 15 mm — that’s one of the narrower slices in the ET 200SP family, so it packs densely on the DIN rail. Depth of 52 mm and height of 81 mm are standard for the form factor. Power draw is minimal at 0.6 W, all drawn from the 24 V DC backplane. Wire-break and group-error diagnostics are parameterizable — you can enable or disable group diagnostics and overflow/underflow reporting per module. Integration time is selectable at 16,7 ms or 20 ms, matching 50 or 60 Hz line rejection. Digital filtering stages can be set via four steps (none, low, medium, high), with corresponding cycle-time multipliers 1x, 4x, 32x, 64x. Shielded sensor cable can run up to 200 m to the field device without a repeater.