Product Overview

The 6ES5432-4UA11​ is a SIMATIC S5-432 series digital input module from Siemens, built in the compact form factor but with galvanic isolation (floating)​ and a group signal (SAMMELSIGNAL)​ feature — a combination that places it in a distinct niche within the S5 DI family. While the closely numbered 6ES5420-4UA11/4UA14 compact DI modules are non-isolated (shared M return, compact rack bus), the 6ES5432-4UA11​ adds optocoupler-based channel isolation while retaining the shallow compact mechanical profile, meaning it seats in S5-90U, S5-95U, S5-100U central racks and ET 100U / ET 200U distributed stations — the same hosts as the 5420 — but brings isolation to field wiring that the 5420 cannot safely handle.The 6ES5432-4UA11​ delivers 32 digital inputs at 24 V DC in a single compact-slot footprint, accepting the standard S5 DI “0” range (–30 to +5 V) and “1” range (+13 to +30 V) with a typical ~7–8 mA input current per channel (consistent with the S5 432 compact DI electrical family). What sets it apart from the 5420 siblings is the group signal​ function: the module aggregates channel activity into a consolidated status indicator (via the process image) that can be read by the CPU — useful when 32 inputs represent, say, a bank of guard-door interlocks or a string of float-switch trees where the presence of any active input matters more than which specific one, or where a supervisory OB needs a single bit to know “something on this DI group is active” without scanning all 32 I-bytes. In S5-90U/95U/100U machines where panel space forbids a standard-depth 5430/5440 rack yet field conditions (mixed 0 V references, proximity to VFD commons, separate sensor PSUs) demand isolation, the 6ES5432-4UA11​ is the engineered answer — compact depth + isolated groups.Siemens placed the 6ES5432-4UA11​ into PM500 (discontinued, end of PLM & support) effective 1 Oct 1999, “deleted without replacement” per the Industry Mall record. No direct successor exists in the current Siemens portfolio — the migration path would be a full S7-1500 / ET 200SP retrofit, which most S5-compact plants are not yet ready to fund. Hence the 6ES5432-4UA11​ today lives entirely in the legacy-MRO economy: refurbished, NOS, and broker-sourced units feeding storerooms that still run S5-90U/95U/100U compact racks in packaging OEM machines, compact water-skids, food-batch cells, and material-handling zones where the original panel builder chose compact S5 and isolation was still a requirement.

Technical Specifications