SIEMENS 6SN1123-1AA00-0CA0 – SIMODRIVE 611 Motor/Power Module for multi‑axis servo drives

The Siemens 6SN1123-1AA00-0CA0 belongs to the SIMODRIVE 611 family and is used as a motor/power module within a common DC link system. In many cases, it’s installed alongside a 611 infeed/regenerative module (e.g., 6SN1145) and a 611 drive control board (e.g., 6SN1118) to run one or more servo axes on CNC machining centers, packaging lines, or printing equipment. From my experience, this module is often chosen as a drop-in replacement to restore an axis quickly without reworking the entire cabinet layout.

One thing I appreciate is how it keeps the familiar 611 “booksize” form factor, so maintenance teams can swap it with minimal rewiring. You might notice that parameter compatibility within the 611 stack typically makes commissioning straightforward—especially when you’re reusing the existing control board and encoder setup.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery time: 1 week for in-stock; no more than one month at the latest
• Payment: 50% advance payment, full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• SIMODRIVE 611 architecture – Works within a shared DC link with 611 infeed/regen modules; ideal for multi‑axis machine tools and retrofits.
• Booksize mechanical format – Compact, cabinet‑friendly design for quick swap‑outs and straightforward panel integration.
• High dynamic servo control – Paired with the 611 drive control unit, it typically supports fast current/velocity loops for demanding axis motion.
• Encoder and fieldbus via control board – Feedback and communication (e.g., PROFIBUS or SERCOS, depending on control board) are handled on the associated 611 control board, keeping the power stage robust and simple.
• Common spare part for CNC uptime – Frequently used as a direct replacement to cure amplifier faults, overcurrent trips, or intermittent axis shutdowns.
• Serviceable design – Clear front access for DC link and motor terminals; typical Siemens labeling eases troubleshooting.

Technical Specifications

Related or Supporting Products

• 6SN1145 (Infeed/Regenerative Module) – Feeds the common DC link; choose rating to match total axis power and braking needs.
• 6SN1118 (Drive Control Board) – Provides the servo control loops, encoder interfaces, and fieldbus (variants for PROFIBUS or SERCOS are common).
• 6SN1123 variant motor/power modules – Different current ratings and axis configurations; the suffix defines the exact rating and options.
• SIEMENS 1FT6 / 1FK7 servo motors – Frequently paired with SIMODRIVE 611; check encoder type and cable sets for compatibility.
• Braking resistor assemblies – If using a non‑regen infeed or requiring additional dynamic braking capacity.

A maintenance lead at a metalworking plant told me they swapped this module into a 611 rack and were cutting parts again in under 30 minutes—no PLC edits, just parameter check and a motor test. That’s typically how a like‑for‑like replacement should feel on a healthy 611 stack.

Installation & Maintenance

• Cabinet standards: Mount vertically in a clean, dry control cabinet; maintain the clearances Siemens specifies for top/bottom airflow.
• Ventilation: Provide forced‑air cooling; avoid recirculating warm exhaust over the module. Keep filters clean to prevent thermal derating.
• Wiring: Connect to the common DC link and motor U/V/W per the 611 wiring diagram. Shield motor and encoder cables properly, with grounding at designated points.
• Safety: Lock out/tag out the cabinet, discharge the DC bus, and verify absence of voltage before touching terminals. The DC link can remain charged even after mains is off.
• Routine checks: Inspect connectors and busbars for discoloration or looseness; clean dust; verify fan airflow. Periodic torque checks on power terminals are a good idea.
• Firmware/parameters: Parameter sets reside on the 611 control board; back them up before replacement. After installation, run a low‑speed jog and autotune (if applicable) to confirm stability.

Quality & Certifications

• Typically conforms to CE requirements for industrial control equipment; many units are cULus recognized for North American installations.
• Manufactured within Siemens quality system (ISO 9001). RoHS status can depend on production period for legacy 611 parts; we typically verify on a unit‑by‑unit basis.
• Warranty: 12 months from shipment (365 days).

If you’re replacing an existing module, sharing the full part code from the nameplate and the infeed/control board models helps confirm compatibility. That small step usually prevents surprises on site.