Siemens 6ES5498-1AA51 2-Wire Transducer

Siemens 6ES5498-1AA51 is a 2‑wire measuring range module (2‑wire MU design) for SIMATIC S5 analog inputs, configured to handle +4 to +20 mA signals from standard industrial transducers. The device operates as a 2‑wire transducer that uses M+ and M− terminals to feed the analog input path while L+ and L− supply the module, enabling a compact, single‑pair wiring scheme. Classified as a measuring range module for analog inputs, it interfaces with 4–20 mA transmitters into the S5 analog channel chain, typically for sensors such as pressure, level, or temperature transmitters in process control. Within the analog input subsystem, the current signal is conditioned through a multiplexer and converted by an on‑board A/D converter so the PLC can read a digital value. This Siemens part is part of the SIMATIC S5 family and is chosen when a 2‑wire transmitter signal must be accurately measured by an analog input module, offering a straightforward solution for legacy installations that require robust 4–20 mA signal handling with minimal wiring.