ET 200PRO 16‑Channel Input Module
The 6ES7141-4BH00-0AA0: The Siemens 6ES7141‑4BH00‑0AA0 is an active‑production SIMATIC DP electronic module for the ET 200PRO distributed I/O family. It provides 16 digital inputs rated for 24 V DC, with integrated module diagnostics and per‑module electronic short‑circuit protection on the sensor supply.
Protection & Diagnostics
Short‑circuit protection is electronic per module (not per channel). The encoder power supply outputs are also protected against reverse polarity – a useful safeguard when wiring in the panel that prevents module destruction if the 24 V line is reversed. Module diagnostics generate a group error (red SF indicator) and a diagnostic alarm. Diagnostic information is readable over the backplane, so the controller can pinpoint a sensor fault without an additional I/O card.
Peer Alternatives – What Fits, What Doesn’t
The closest catalogue siblings are the 6ES7148‑4FA00‑0AB0 and 6ES7148‑4FC00‑0AB0 ET 200PRO modules. Both are combi modules (mixed I/O) rather than a pure 16‑channel input block. The 6ES7148‑4FA00‑0AB0, for example, includes digital outputs and a different address mapping. They physically fit the same bus module and backplane, but the wiring plan and configuration data differ – you cannot drop the 6ES7148 into a panel wired for this 16DI module without rewiring the field terminals and updating the hardware configuration.
Mechanical & Wiring Notes
Propagation delay: off‑to‑on between 1.2 ms and 4.8 ms; on‑to‑off between 0.7 ms and 3 ms. Not isochronous‑mode capable. Isolation tested at 707 V DC (type test) between channels and the backplane bus.