The Siemens 6AG1134-4JB51-7AB0 is a four-channel analog input module designed for resistance thermometers. It accepts Pt100 and Ni100 sensors in both standard and climatic ranges, and two of the four inputs support 3- or 4-wire connection to cancel lead resistance. Rated ambient temperature spans -25 °C to 70 °C, so it survives both an unheated storage room and a packed panel near motor drives.
Conversion time per channel is 66 or 80 ms depending on the diagnostic wire-break test being active. Cycle time for all active channels equals the number of channels times the basic conversion time, up to a maximum of 8 bytes of address space. Digital filtering is parameterizable in four steps: 1x, 4x, 32x, or 64x cycle time. Integration time is selectable at 16,7 ms or 20 ms, matching 60 Hz or 50 Hz line frequencies. Diagnostics cover wire-break, overflow/underflow, and group error (SF red). Each diagnostic group can be disabled or enabled individually. The module carries CE marking. Isolation is tested at 500 V DC. Reverse polarity protection is built in. Maximum shielded cable length is 200 m.