Siemens 6ES7193-4CA40-0AA0 Terminal Module – ET200S TM-E15S26-A1

Siemens 6ES7193-4CA40-0AA0 TM-E15S26-A1 — Passive Terminal Module for SIMATIC ET200S Distributed I/O Stations

The 6ES7193-4CA40-0AA0 is a passive screw-type terminal module (TM-E15S26-A1) designed exclusively for the SIMATIC ET200S distributed I/O platform. Its function within a control loop is structurally foundational: it decouples field-side wiring from the electronic module above it, establishing a permanent, vibration-resistant conductor interface that persists across electronic module replacements. In high-availability production environments — where unplanned downtime carries measurable cost per minute — this physical separation between field wiring and active electronics is not a convenience feature; it is an architectural requirement.

Each 6ES7193-4CA40-0AA0 unit provides 15 screw terminals rated at 10 A per conductor, accepting wire cross-sections from 0.25 mm² to 1.5 mm² (AWG 24–16). The module snaps onto a standard 35 mm DIN rail and integrates directly into the ET200S backplane bus via the profile rail system. At 15 mm width, it maintains the channel density that makes ET200S the preferred distributed I/O platform for compact control cabinet designs in automotive, pharmaceutical, and process industries. This SKU ships in packs of five modules per order.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The TM-E15S26-A1 operates on a two-layer physical architecture. The lower layer — the terminal module itself — is a purely passive component: no active silicon, no firmware, no bus logic. Its sole function is to provide a mechanically stable, electrically reliable conductor interface between field cables and the spring-loaded gold-plated contacts of the electronic module seated above it. This separation is deliberate and carries significant engineering consequences.

Mechanical decoupling and hot-swap integrity: The electronic module locks into the terminal module via a coded mechanical key that prevents incorrect module insertion — a passive interlock mechanism that eliminates mis-seating errors without requiring software validation. When the electronic module is extracted, the field conductors remain clamped in the screw terminals, maintaining their torque-set connections. Re-insertion of a replacement electronic module re-establishes the electrical path in under 30 seconds without tools, without re-wiring, and without interrupting adjacent channels on the ET200S station.

EMC design at the terminal interface: Screw-type terminals in the TM-E15S26-A1 provide a gas-tight conductor clamp when torqued to the specified 0.5–0.6 Nm range. Gas-tight connections eliminate micro-arcing at the contact interface — a primary source of conducted emissions in high-density I/O wiring. The module housing is constructed from flame-retardant thermoplastic (UL 94 V-0 rated), which provides dielectric isolation between adjacent terminal rows and prevents arc propagation in fault conditions. The 15 mm pitch spacing between modules on the DIN rail maintains adequate creepage and clearance distances per IEC 60664-1 for 230 V AC rated circuits.

Backplane bus continuity: The TM-E15S26-A1 carries the ET200S internal bus through its profile rail connector. The bus contacts are gold-plated to maintain low contact resistance (<10 mΩ) across the rated service life of 100 insertion cycles. Bus signal integrity is preserved regardless of whether an electronic module is seated, allowing the ET200S interface module to continue polling remaining stations during a module swap — a behaviour that supports partial-station diagnostics without full station shutdown.

Conductor management: The 15-terminal layout of the TM-E15S26-A1 maps directly to the pin-out of 2-wire ET200S electronic modules, providing dedicated terminals for signal, common, and shield connections. Integrated labelling strip slots accept standard Siemens identification labels (6ES7193-4DA10-0AA0), enabling systematic terminal documentation that satisfies IEC 60204-1 wiring identification requirements without additional marking hardware.

System Integration Benefits

• Zero-downtime module exchange: Field wiring remains undisturbed during electronic module replacement. The ET200S station continues operating on unaffected channels, reducing maintenance windows to the physical swap time of the electronic module — typically under two minutes for a trained technician.
• Deterministic I/O response preservation: Because the terminal module introduces no active logic, it adds zero latency to the I/O scan cycle. Signal propagation from field conductor to electronic module input register is purely resistive, with no buffering or conversion stages that could introduce jitter into time-critical control loops.
• Diagnostic transparency at the field level: The mechanical coding system on the TM-E15S26-A1 ensures that only the correct electronic module variant can be seated. This hardware-enforced type checking prevents configuration mismatches that would otherwise require software diagnostics to detect — faults are caught at the physical layer before the control program executes.
• Reduced BOM complexity: A single terminal module variant (6ES7193-4CA40-0AA0) serves all 2-wire ET200S electronic modules, eliminating the need to stock multiple terminal module types for mixed I/O stations. This simplifies spare parts inventory and reduces procurement overhead for multi-station projects.
• Scalable station architecture: ET200S stations can be expanded by adding terminal module and electronic module pairs to the profile rail without modifying existing wiring. The 6ES7193-4CA40-0AA0 integrates into both new station builds and field expansions of existing installations without requiring station reconfiguration.
• Vibration and shock tolerance: Screw terminal connections maintain specified contact force under the vibration and shock conditions defined in IEC 60068-2-6 and IEC 60068-2-27. In press, compressor, and mobile equipment applications where push-in terminals may loosen over time, screw-type connections provide a measurably more stable long-term interface.
• Compliance with functional safety wiring practices: The terminal module’s gas-tight screw connections and colour-coded housing support wiring practices required in IEC 62061 and ISO 13849 safety-rated control systems, where conductor integrity must be verifiable and maintainable over the machine service life.
• 5-pack procurement efficiency: The 6ES7193-4CA40-0AA0 is supplied in packs of five, aligning with the typical ET200S station build-out quantity. A standard 8-channel digital I/O station requires four to six terminal modules; a single pack covers one complete station, simplifying BOM line-item management and reducing purchase order fragmentation.

Quality Assurance & Global Logistics

Every 6ES7193-4CA40-0AA0 unit supplied by siemensplc.com is sourced as genuine Siemens-manufactured product, traceable to Siemens production batch records. Prior to dispatch from our Xiamen, China facility, each unit undergoes a structured pre-shipment inspection protocol:

• Housing integrity check — no cracks, deformation, or terminal damage
• Terminal condition verification — screw thread engagement, contact surface condition
• Label legibility and batch code cross-reference against Siemens production documentation
• Anti-static packaging with desiccant and humidity indicator card
• Certificate of conformity available on request for regulated industries

We do not supply counterfeit, refurbished-as-new, or unverified grey-market stock. All products carry a 12-month warranty against manufacturing defects from the date of shipment.

Logistics from Xiamen cover all major global markets. Standard export documentation (commercial invoice, packing list, certificate of origin) is prepared for every international shipment. DDP (Delivered Duty Paid) terms are available for key markets. In-stock orders typically ship within 1–3 business days. For large-volume orders, consolidated shipment scheduling is available to optimise freight cost. HS Code 8538.90 applies for customs classification.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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