Siemens 6ES7590-1AC40-0AA0 — S7-1500 Mounting Rail Buying Guide

By Abdullah Zahid
11 min read
Siemens 6ES7590-1AC40-0AA0 SIMATIC S7-1500 245 mm aluminum mounting rail with integrated DIN rail and grounding screw for industrial control cabinet

Siemens 6ES7590-1AC40-0AA0 — SIMATIC S7-1500 Mounting Rail 245 mm: Complete Specifications and Selection Guide

Controls engineers and panel builders searching for the Siemens 6ES7590-1AC40-0AA0 are typically at the final verification stage — they have committed to the SIMATIC S7-1500 platform and now need to confirm the mounting rail SKU, check dimensional fit against their cabinet drawing, and lock in availability before the build schedule moves. The 6ES7590-1AC40-0AA0 is the 245 mm (9.6 inch) aluminum mounting rail for the SIMATIC S7-1500 system, shipped complete with an integrated grounding screw and a pre-installed 35 mm TS 35 DIN rail for standard-compliant mounting of terminals, circuit breakers, and relays alongside the PLC modules.

If you have already confirmed this is the correct part for your enclosure layout, check current pricing and availability at LeadTime.ca — ships worldwide.

Is the 6ES7590-1AC40-0AA0 the Right Rail for Your Cabinet?

This rail is the correct choice for engineers building or retrofitting a SIMATIC S7-1500 control cabinet with a compact to mid-size module count. Confirm all of the following before ordering:

  • Your system uses a SIMATIC S7-1500 CPU — this rail is not compatible with S7-1200, S7-300, or S7-400 architectures
  • Available mounting space in your enclosure is at least 245 mm (9.6 inch) wide and 155 mm tall
  • Your module and terminal count fits within 16 positions at standard 17.5 mm module pitch on a 245 mm span
  • Your facility has a bonded ground plane accessible for a dedicated copper grounding conductor to the integrated M4 grounding screw
  • Aluminum construction with a galvanically isolated surface is acceptable for your enclosure environment

If your system requires more than 16 modules or your cabinet layout demands a longer span, the 500 mm variant (such as 6ES7590-1BF40-0AA0 — confirm exact part number with your distributor) is the appropriate choice instead.

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What the 6ES7590-1AC40-0AA0 Actually Does in a Running System

The 6ES7590-1AC40-0AA0 is not a controller, an I/O module, or a power supply — it is the mechanical and electrical foundation on which every other component in an S7-1500 cabinet is built. Its 245 mm aluminum body provides the physical mounting substrate for the SIMATIC S7-1500 CPU, signal modules, communication modules, and ancillary DIN-rail-mounted devices such as terminal blocks, circuit breakers, and relays. Without it, none of those components have a validated mounting surface.

The galvanically isolated aluminum surface is a detail that matters in noisy factory environments. By electrically decoupling the rail from the enclosure frame, it prevents ground loops and eddy current paths from coupling into the PLC signal conductors — a known failure mode in variable-frequency drive environments and high-current switching applications. The integrated M4 grounding screw provides a single, defined point for bonding the rail to the facility ground plane, ensuring that any stray currents have a controlled discharge path rather than routing through signal wiring.

The pre-installed 35 mm TS 35 DIN rail means the unit ships ready to accept terminal blocks and protective devices without on-site rail cutting or fabrication. For OEM panel builders working to labor-hour targets, that matters.

Typical S7-1500 System Architecture Using This Rail

The 6ES7590-1AC40-0AA0 sits at the physical layer of the control system — it is the component that connects the enclosure structure to the PLC stack and all downstream field wiring terminations. A typical deployment chain looks like this:

  • Control enclosure backplate or mounting surface — anchors the 6ES7590-1AC40-0AA0 using standard 35 mm DIN rail clips
  • 6ES7590-1AC40-0AA0 mounting rail — provides the 245 mm span with integrated grounding screw and pre-installed TS 35 DIN rail
  • SIMATIC S7-1500 CPU (e.g., 1511, 1513, 1515 or F-variant) — snaps onto the rail at the left position
  • Signal modules, communication modules, and power modules — mount sequentially at 17.5 mm pitch toward the right
  • Terminal blocks, circuit breakers, and relays — mount on the integrated DIN rail section for field wiring consolidation in the same compartment

Where Engineers Deploy the 6ES7590-1AC40-0AA0

OEM panel builders constructing control cabinets for machine tools, injection molding lines, and robotic assembly cells are the highest-volume buyers of this part. The 245 mm width fits standard 19-inch and modular enclosure designs, making it the default choice for compact machine control panels where the CPU and a moderate I/O count can be consolidated on a single rail.

System integrators delivering full-system projects — PLC, distributed I/O, protective devices, and communication modules — use this rail as the foundation for consolidated single-rail architecture. ET 200MP decentralized I/O stations mount on the same rail alongside the S7-1500 CPU, reducing overall cabinet footprint.

Retrofit projects replacing aging S7-300 cabinets with SIMATIC S7-1500 architecture represent a significant portion of demand. The S7-300 mounting is not backward compatible with S7-1500 modules — a complete cabinet redesign is required, and the 6ES7590-1AC40-0AA0 is the validated starting point for that new installation.

Maintenance departments also stock this rail as a critical spare. In production environments where an S7-1500 cabinet failure would halt a line, having a replacement mounting assembly on the shelf reduces unplanned downtime from days to hours.

Application Typical Deployment
OEM Machine Tool Panel S7-1500 CPU + signal modules on 245 mm rail inside 19-inch enclosure
Robotic Assembly Cell Control Single-rail consolidation of CPU, I/O, and safety modules in compact enclosure
ET 200MP Distributed I/O Node Interface module and I/O modules mounted with terminals on same 245 mm rail
S7-300 to S7-1500 Retrofit Full cabinet redesign using 6ES7590-1AC40-0AA0 as new mounting foundation
Food and Beverage Packaging Line S7-1500 CPU with communication and signal modules in wash-down enclosure
Maintenance Spare Parts Inventory Stocked unit for rapid replacement of failed mounting infrastructure

Key Specifications: What You Need to Know Before Ordering

Specification Value
Width 245 mm (approx. 9.6 inch)
Height 155 mm
Depth 16 mm
Weight Approximately 480 grams
Material Aluminum, galvanically isolated surface
Grounding Integrated M4 grounding screw
DIN Rail Standard 35 mm TS 35, pre-installed
Compatible Product Family SIMATIC S7-1500 (all CPU variants incl. F-series)
Maximum Module Count Up to 16 modules at standard 17.5 mm pitch
Certifications eClass 27-40-06-02, ETIM EC001285, UNSPSC 39-12-17-08, KC valid

Full technical specifications are available on the product page at LeadTime.ca.

6ES7590-1AC40-0AA0 vs. Other S7-1500 Mounting Rail Options

Variant Width Module Capacity Best Fit
6ES7590-1AC40-0AA0 245 mm (9.6 inch) Up to 16 modules Compact OEM panels, retrofit projects, standard enclosures
500 mm variant (e.g., 6ES7590-1BF40-0AA0*) 500 mm 12–16+ modules with expansion Larger modular systems, distributed I/O expansion, future-proofing
SIMATIC S7-1500F Compact (integrated) Integrated base unit Pre-defined, fixed Quick-deploy or space-constrained installations; no separate rail needed
Legacy S7-300 mounting Various Not applicable Not compatible with S7-1500 — do not use

*Confirm exact 500 mm part number with your distributor before ordering. If your architecture calls for a 245 mm span with up to 16 S7-1500 modules, the 6ES7590-1AC40-0AA0 is the validated choice — check current availability at LeadTime.ca.

Expert Verdict: Honest Assessment for Purchase-Stage Engineers

The 6ES7590-1AC40-0AA0 does exactly what a mounting rail should do, and it does it without surprises. The 245 mm aluminum body with galvanically isolated surface and integrated M4 grounding screw represents the kind of system-ready design that shortens cabinet assembly time — you are not cutting rail stock, sourcing a separate grounding lug, or verifying third-party DIN rail compatibility. It ships ready to receive up to 16 S7-1500 modules at 17.5 mm pitch, and the pre-installed 35 mm TS 35 DIN rail accepts standard terminal blocks, circuit breakers, and relays without additional hardware. For OEM panel builders and system integrators working on S7-1500 installations, this is the correct part and the procurement decision is straightforward.

Where this rail is not the right call: if your module and terminal count pushes beyond 16 positions at standard spacing, the 245 mm span will not accommodate the full BOM and you should evaluate the 500 mm variant before ordering. Similarly, if you are building a compact pre-assembled solution rather than a modular cabinet, an integrated S7-1500 compact base unit eliminates the separate rail purchase entirely. And if your existing cabinet is based on S7-300 architecture, be aware that the mounting interface is not backward compatible — the 6ES7590-1AC40-0AA0 is a new installation component, not a drop-in replacement for legacy rails.

From a procurement standpoint, this is a stable, long-running product with no obsolescence flags as of the most recent data. Stock is typically available through authorized distributors for 2–5 day delivery, with OEM bulk order lead times of 4–10 weeks for special quantities. If you are building multiple cabinets or managing a spares program, volume pricing is available and worth requesting. If this matches your system requirements, view current stock and pricing at LeadTime.ca.

For volume pricing or to confirm lead time before committing to a build schedule, contact the LeadTime.ca team directly — we ship worldwide.

Wiring and Installation Overview

The following points cover the key requirements for physically installing the 6ES7590-1AC40-0AA0. Engineers requiring full step-by-step procedures should refer to the Siemens SIMATIC S7-1500 installation documentation.

  • Confirm at least 245 mm horizontal clearance and 155 mm vertical clearance in the enclosure mounting area before positioning the rail
  • Mount the rail using standard 35 mm DIN rail clips; verify horizontal level alignment — tolerance should be within ±2 mm over the 245 mm span
  • Connect a dedicated copper grounding conductor to the integrated M4 grounding screw; do not rely on DIN rail clip contact to the enclosure frame as the sole grounding path
  • Mount the S7-1500 CPU at the left end of the rail first, then install signal modules, communication modules, and power modules sequentially at 17.5 mm pitch moving right
  • Leave minimum 50 mm clearance above and below the rail for air circulation and cable routing access

Commissioning Verification Overview

Before energizing the cabinet, complete the following verification steps. Full commissioning procedures are documented in the Siemens SIMATIC S7-1500 system manual.

  • Use a digital multimeter to verify electrical continuity between the rail grounding screw and the facility ground plane — target resistance is less than 0.1 ohm
  • Measure isolation resistance between the aluminum rail surface and any connected signal conductors — target is greater than 10 megaohms
  • Visually confirm all module snap-on rail clips are fully engaged — modules should not move horizontally or vertically under hand pressure
  • Power on the system and perform a software integrity check via the Siemens SIMATIC development environment to confirm all modules are detected by the CPU
  • Record the grounding connection point, module sequence, and cable routing in the cabinet documentation for future maintenance reference

What Engineers Get Wrong When Ordering This Part

The following checklist covers the verification steps that prevent misorders, installation rework, and compliance failures. Review every item before placing your order.

  1. Verify S7-1500 compatibility: Confirm your system uses SIMATIC S7-1500 CPU, not S7-1200, S7-300, or S7-400
  2. Check available enclosure width: 245 mm (9.6 inch) width; measure available mounting space in your control cabinet
  3. Confirm terminal and module count: Ensure integrated DIN rail spacing matches your terminal block and breaker mounting footprint
  4. Grounding availability: Verify your plant has a bonded ground plane and dedicated grounding terminal ready
  5. Material compatibility: Confirm aluminum mounting (not stainless or composite) is acceptable for your environment
  6. Isolation requirement: Verify that galvanic isolation from enclosure frame is required (standard in most electrical cabinets; not needed in non-metallic enclosures)
  7. Regional certifications: Confirm KC (Korea Certification) and applicable EN/IEC standards align with your installation region

If any item on this list raises a question about fit or compatibility, contact the LeadTime.ca team before ordering — our team can help verify the correct part number for your specific application.

Frequently Asked Questions

Does the 6ES7590-1AC40-0AA0 work with all S7-1500 CPU variants including F-series safety CPUs?

Yes. The 6ES7590-1AC40-0AA0 is compatible with all SIMATIC S7-1500 CPUs including the 1511, 1512, 1513, 1515, 1517, and 1518 variants, as well as the F-series safety CPU variants. It also supports ET 200MP distributed I/O interface modules and SIMATIC signal and communication modules on the same rail.

Can this mounting rail fit in a standard 19-inch enclosure without modification?

The 245 mm (9.6 inch) width is specifically sized to fit standard 19-inch and modular enclosure designs. Before ordering, measure the available horizontal mounting space and verify at least 245 mm clearance is present. The 155 mm height and 16 mm depth must also clear the enclosure backplate and any adjacent components.

What happens if I skip the dedicated grounding conductor and rely on the DIN rail clip contact to the enclosure frame?

Relying on clip contact alone is not a validated grounding method for this rail. Without a dedicated copper conductor to the M4 grounding screw, you risk increased EMI sensitivity, intermittent signal noise, unpredictable PLC faults, and potential certification failure in regulated industries. Always install a separate grounding conductor bonded to the main facility ground bus and verify continuity before energizing the system.

How many modules can realistically be mounted on the 245 mm rail at standard S7-1500 spacing?

At the standard 17.5 mm module pitch, up to 16 modules can be accommodated on the 245 mm span. Before ordering, calculate your actual footprint: multiply your module count by 17.5 mm and add approximately 20 mm of buffer for end clearances. If the result exceeds 245 mm, the 500 mm variant is the appropriate choice.

Is the 6ES7590-1AC40-0AA0 on any obsolescence watch list?

Based on available data as of the most recent review, this product shows no obsolescence flags and maintains stable manufacturing availability. It is a long-running product within the SIMATIC S7-1500 family. For the most current product lifecycle status, confirm directly with your authorized distributor at time of order.

What are the typical lead times when ordering through LeadTime.ca?

In-stock orders from authorized distributors typically ship within 2–5 business days. For OEM bulk orders of 10 or more units as a special order, lead times of 4–10 weeks should be anticipated. LeadTime.ca ships worldwide — contact the team directly for current stock status and volume pricing before committing to a build schedule.

Why Order the 6ES7590-1AC40-0AA0 From LeadTime.ca

  • Worldwide shipping — no geographic restrictions on where orders are fulfilled
  • Authorized distributor access for genuine Siemens parts with full manufacturer warranty coverage
  • Volume pricing available for OEM panel builders and spares inventory programs — request a quote for 10+ units
  • Fast response for lead time confirmation before you commit to a build schedule
  • Hard-to-find and short-lead-time sourcing for urgent replacement or retrofit projects

At-a-Glance Summary

  • Catalog number: 6ES7590-1AC40-0AA0 — 245 mm (9.6 inch) aluminum mounting rail for SIMATIC S7-1500
  • Physical dimensions: 245 mm wide × 155 mm tall × 16 mm deep; approximately 480 grams
  • Material: Aluminum with galvanically isolated surface — prevents ground loops and EMI coupling in metallic enclosures
  • Grounding: Integrated M4 grounding screw for bonded connection to facility ground plane
  • DIN rail: Pre-installed 35 mm TS 35 — accepts IEC terminal blocks, circuit breakers, and relays without additional hardware
  • Compatible with all SIMATIC S7-1500 CPUs (1511 through 1518, including F-series) and ET 200MP distributed I/O
  • Maximum capacity: Up to 16 modules at 17.5 mm standard pitch
  • Certifications: eClass 27-40-06-02, ETIM EC001285, UNSPSC 39-12-17-08, KC valid as of 12/18/2020
  • Not compatible with S7-300, S7-400, or S7-1200 — confirm platform before ordering
  • Typical in-stock lead time: 2–5 business days; bulk orders 4–10 weeks