Product Overview

The Siemens 6AR1306-0DC00-0AA0​ is a rack-mounted power supply module belonging to Siemens’s 6AR1 family, engineered specifically as the DC-input power source for SIMADYN D PM4 and PM5 processor racks, with cross-compatibility into S5-135U central racks where a 24 V DC bulk supply is preferred over AC-line distribution. Within the 6AR1 ladder, the model digits encode both input type and current class: “1306” places this unit in the ~10 A output tier (1301 = 2 A, 1302 = 5 A, 1306 = 10 A), while the “0DC00” middle segment designates 24 V DC input—distinct from the more common AC-input siblings such as 6AR1301-0AA00-0AA0 that take 120/230 V AC and dominate mainland-European plants. The Siemens 6AR1306-0DC00-0AA0​ therefore occupies a narrower but critically important niche: marine vessels running on a ship’s 24 V DC main bus, offshore-platform E-houses where the DCS/relay room is fed from a centralized 24 V DC UPS plant, and telecom or utility sites that distribute 24 V DC to rack-level rather than stepping up to 120/230 V AC at every cabinet.

Electrically, the 6AR1306-0DC00-0AA0​ accepts a 20.4–28.8 V DC window on its front-terminal or rear-busbar feed (per cabinet build) and regulates onto the PM4/PM5 backplane the three rails those processor and daughter cards require—nominally 5 V DC plus ±15 V DC—at the ~10 A aggregate class. Protection is hardware-integrated: short-circuit, overload, and over-temperature with automatic recovery, reported to the front panel via a two-LED cluster (green = OK, red = fault) that lets a control-room technician spot a supply trip without opening the rack door. Mechanical mounting follows the SIMADYN D PM4/PM5 and S5-135U rack standard—guide rails plus rear backplane connector, with passive cooling that relies on the rack’s own forced-air or natural-convection path. From a lifecycle standpoint, SIMADYN D is now classified “mature/legacy” under Siemens (successors being SINAMICS DCM and S120 for drive refreshes, TDC for high-end motion), but the installed base is enormous in hot-strip rolling mills, hydro turbine governors, marine propulsion drives, and cement/paper mill main drives—plants where a full drive retrofit runs $10 M+ per line tend to keep SIMADYN D running 30+ years on spares. The Siemens 6AR1306-0DC00-0AA0​ is one of the higher-turnover spares in that ecosystem because a rack PS failure takes down the entire PM4 processor plus all I/O daughter cards—on a hot-strip roughing stand, that is the whole stand offline. For spare-parts buyers, one 6AR1306-0DC00-0AA0​ per PM4/PM5 rack type on the shelf is standard practice, plus a cross-check that the plant’s 24 V DC bulk can deliver the module’s cold-start inrush without sagging below the 20.4 V minimum.

Technical Specifications

Main Features and Advantages

The Siemens 6AR1306-0DC00-0AA0​ is not a general-purpose DIN-rail PSU—it is a rack-infrastructure module whose value lies in the specific SIMADYN D / S5-135U architecture it serves. Several design decisions make it the correct (and only) choice in its lane.

DC-input for 24 V DC plant architectures.​ The “0DC00” designation puts this module in the minority of 6AR1 SKUs—most plants feed SIMADYN D racks from 120/230 V AC via 6AR1301/1302 AC-input units. But marine switchboards, offshore E-houses, and telecom/utility DCS rooms often standardize on a bulk 24 V DC distribution (battery-backed UPS at the string level, then 24 V homeruns to each cabinet). In those environments the Siemens 6AR1306-0DC00-0AA0​ eliminates a 120/230 V AC transformer per cabinet, reduces fire-load counting, and keeps the rack on the same UPS domain as the DCS I/O. The 20.4–28.8 V DC input window tolerates the normal float-charge swing of a 24 V battery string (≈27.6 V float) without tripping.

10 A class in the 6AR1 ladder.​ Siemens sizes the 6AR1 family in three tiers: 1301 (~2 A) for minimal-card-count racks, 1302 (~5 A) for mid-populated, 1306 (~10 A) for fully populated PM4/PM5 with processor, communication, I/O, and technology daughter cards all drawing from the backplane. The 6AR1306-0DC00-0AA0​ is the one you spec when the PM4 is “full”—undersizing to a 1302 in that scenario produces a thermally derated supply that will nuisance-fault on processor-heavy workloads. For spare-kit standardization, many plants stock only the 1306 tier across all PM4/PM5 positions because the price delta over a 1302 is small and the headroom avoids future mispopulation.

Auto-recovery protection trio.​ Short-circuit, overload, and over-temperature are hardware-level with automatic recovery rather than a one-shot fuse or manual-reset latch. On a SIMADYN D rack where a daughter card develops a backplane pin short, the Siemens 6AR1306-0DC00-0AA0​ trips, protects itself, and—once the fault clears (card pulled, pin cleaned)—recovers without a technician cycling a reset button inside the rack. The front LEDs (green OK / red fault) let the control room spot a supply trip before a motor-feedback timeout cascades into a drive fault, which is the difference between a 2-minute card-swap and a 30-minute rack-restart on a rolling-mill stand.

Passive cooling by design.​ The module carries no fan; dissipation is handled by the PM4/PM5 rack’s own airflow (forced in most drive cabinets, natural in S5-135U control rooms). This removes the most common mechanical wear-item and keeps the 6AR1306-0DC00-0AA0​ viable for 20–30-year service life in dusty or humid spaces—cement mill MCC rooms and pulp/paper machine halls are classic examples where a fanned supply would seize within 3–5 years.

Backplane integration, not standalone.​ The Siemens 6AR1306-0DC00-0AA0​ doesn’t have a 24 V output terminal for field devices—its job ends at the rack backplane. 5 V and ±15 V are distributed to the PM4/PM5 CPU, communication processors (CP), technology modules, and I/O daughter cards via the backplane fingers. This architectural purity is why you cannot substitute a SITOP 6EP into a PM4 rack—the rail set and connector geometry are completely different. The 6AR1306-0DC00-0AA0​ is the only correct Siemens spare for that slot.