Four analog inputs, two outputs, one wide-input module
The Siemens 6AG1334-0KE00-2AB0 is a SIPLUS SM 334 analog I/O module for the S7-300 family, packing four analog inputs and two analog outputs in a single 40 mm-wide unit that draws 60 mA from the 5 V backplane bus and dissipates 2 W typical. It handles Pt100 resistance thermometers (climate range only), 0 to 10 V voltage inputs, and resistance measurement up to 10 kΩ, with a 500 µs conversion time per channel and a maximum cycle time of 85 ms across all channels.
What the I/O count and input types mean for your loop
Four analog inputs and two analog outputs mean this module can close a local control loop — read a Pt100 temperature or a 0–10 V transmitter signal, then drive a voltage output to a positioner or small drive — without consuming a second slot. The input resistance of 100 kΩ on the 0–10 V range keeps loading on the sensor output negligible, and the 2.5 kΩ minimum load on the voltage outputs ensures the output stage stays in regulation. Integration time is parameterizable at 16.67 ms or 20 ms, matching 60 Hz or 50 Hz line frequencies to reject mains ripple on the measurement.
SIPLUS build and S7-300 fit
This is the SIPLUS variant — the extended-temperature and coated version of the standard SM 334, built for environments where humidity, condensation, or corrosive gases are a concern. It snaps onto the S7-300 DIN rail and requires a 20-pin front connector (ordered separately). Dimensions are 40 mm wide, 125 mm high, and 117 mm deep — it occupies one standard S7-300 slot width. Reverse polarity protection on the 24 V DC supply is included. Isolation is tested at 500 V DC between the channels and the backplane bus, with no channel-to-channel isolation — keep field wiring on a common reference.
Active production and ordering
The standard S7-300 SM 334 (6ES7334-0KE00-0AB0) is the base variant without conformal coating or extended temperature range; this SIPLUS version is the direct drop-in for harsh-environment builds. No other official cross-reference is listed.