Product Overview

The 6ES5441-4UA12​ is a SIMATIC S5-441 series digital output module from Siemens, built in the non-isolated compact form factor to pair with the S5-90U, S5-95U, S5-100U central racks and their distributed counterparts ET 100U and ET 200U. Where the standard-depth S5 DO line (6ES5440-7LA12 et al., seated in S5-115U/135U/155U deep racks) carries per-group isolation and a deeper mechanical profile, the 6ES5441-4UA12​ trades isolation for channel density and shallow footprint: 32 digital outputs at 24 V DC / 0.5 A per channel in a single compact-slot, matching the 32-DI density of its sibling 6ES5420-4UA14 on the input side. This makes the 6ES5441-4UA12​ the default high-density DO choice for compact S5 machines where panel width is tight, isolation is handled once at the rack or actuator supply level, and 0.5 A per point covers the usual compact-machine loads — pilot valves, indication beacons, solenoid locks, small contactor coils, HMI trigger relays.Each of the 32 outputs on the 6ES5441-4UA12​ sources L+ to the load (PNP/sourcing architecture): the “1” state drives the output pin to approx. L+ (the 24 V compact-rack auxiliary supply or the actuator PSU depending on wiring), the “0” state opens the channel. At 0.5 A per channel continuous, the module can switch typical 24 V DC industrial loads directly — no interposing relay needed for most MRO-indicator, solenoid-valve (≤ 0.5 A inrush managed), or small-contactor-coil duties. Total module power dissipation scales with channel loading; the compact backplane supplies the logic side while the 24 V actuator feed typically comes from the same PSU that powers the compact rack’s +24 V aux (or a separate 24 V switched supply with common M). The 6ES5441-4UA12​ is non-isolated — all 32 outputs share the compact rack’s internal M/L+ bus architecture — so field wiring planning must respect the shared-return rule same as the 5420-4UA14 DI: all actuators on the module should share a common 24 V supply domain, or isolation should be handled at the actuator PSU / per-group terminal level if mixed domains are unavoidable.In the S5 compact ecosystem the 6ES5441-4UA12​ typically sits adjacent to the 6ES5420-4UA14 (32 DI), 6ES5450-4UA14 (analog I/O), and 6ES5380-8MA11 (timer) in the same shallow-profile rack. For MRO teams still supporting S5-90U/95U/100U lines in packaging OEM machines, compact water-skids, food-batch cells and material-handling zones, the module is a frequent storeroom line-item: compact DO modules take the brunt of solenoid short-cycles, inductive kick from under-suppressed contactor coils, and field-cable nicks, and having a verified 6ES5441-4UA12​ on the shelf turns a three-shift line-down into a 20-minute rack swap. The 4UA12 is one of several revisions in the 5441-4UAxx compact DO family (4UA11/4UA12/4UA13/4UA14); the 4UA12 remains the most commonly sourced NOS/refurb SKU for S5 compact spares banking.

Technical Specifications

Main Features and Advantages

32-output density in the shallow compact envelope.​ The headline trait of the 6ES5441-4UA12​ mirrors its DI sibling the 5420-4UA14: 32 points in one compact slot. A four-module compact rack can land 128 DOs where a standard S5-115U rack would need twice the slots for isolated siblings. For OEM machine builders who standardized on S5-100U panels in the 1990s — form-fill-seal, case packer, palletiser, cartoner — the 6ES5441-4UA12​ is what lets them keep actuator counts high without widening the enclosure. Paired with a 5420-4UA14 in adjacent slots, a single 90U/100U rack row can carry 32 DI + 32 DO + analog + timer in four shallow slots — a complete machine controller in < 300 mm of DIN width.0.5 A per channel handles the typical compact-machine load mix.​ Not every S5 DO needs 2 A per point (that’s a different module class). The 6ES5441-4UA12​ at 0.5 A/ch covers the majority of compact-S5 actuator duties: 24 V DC pilot valves (ASCO/Bürkert/Festo single solenoids typically 0.15–0.35 A), indication beacons, tower-light stacks, small Telemecanique/Siemens contactor coils (24 V DC coil draws ~0.2–0.4 A holding), HMI trigger relays, guard-lock solenoid strikes. Loads that exceed 0.5 A (large contactors, star-delta coils, 24 V heater strips) get an interposing relay — which itself is a 0.5 A load on the 6ES5441-4UA12​ channel, solving the problem cleanly. This “right-sized” current rating keeps the module’s thermal profile within compact backplane budget and avoids the cost step-up to 2 A/output modules that most compact machines don’t need.