SIEMENS 6ES7336-1HE00-0AB0 Failsafe Digital Input Module – SIMATIC S7-300 SM 336
Imagine a chemical dosing line where a safety door interlock fails to register — the PLC continues operation, operators are exposed, and a single missed signal cascades into a plant-wide shutdown or worse, a safety incident. In safety-critical automation, the integrity of every digital input channel is non-negotiable. The SIEMENS 6ES7336-1HE00-0AB0 SM 336 F-Digital Input Module is engineered precisely for these environments: it does not merely read signals — it validates them against redundant internal diagnostics, ensuring that a fault is detected and acted upon before it becomes a hazard.
Within the SIMATIC S7-300 failsafe (F) portfolio, the SM 336 occupies the role of the primary field-level safety input interface. Certified to SIL 2 (IEC 61508) and Category 3 (EN 954-1 / ISO 13849), it is the module of choice for machine builders and process engineers who must demonstrate compliance with functional safety standards across automotive, oil & gas, chemical, and heavy manufacturing sectors. Its global installed base — spanning tens of thousands of safety-rated machines — makes it one of the most specified failsafe I/O modules in the SIMATIC ecosystem.
Technical Specifications
- Part Number: 6ES7336-1HE00-0AB0
- Series: SIMATIC S7-300, SM 336
- Module Type: F-Digital Input Module (Failsafe)
- Safety Integrity Level: SIL 2 per IEC 61508
- Safety Category: Category 3 per EN 954-1 / ISO 13849-1
- Number of Inputs: 6 DI (configurable as 6 × 1oo1 or 3 × 1oo2)
- Input Voltage: 24 V DC
- Input Current: Typ. 7 mA per channel
- Backplane Bus: SIMATIC S7-300 standard backplane
- Dimensions (W × H × D): 40 × 125 × 120 mm
- Weight: Approx. 400 g
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: −40 °C to +70 °C
- Degree of Protection: IP 20
- Certifications: CE, UL, cULus, ATEX (Zone 2)
- Compatible CPU: SIMATIC S7-300 F-CPU (e.g., CPU 315F-2 PN/DP, CPU 317F-2 DP)
Key Features & Benefits
- Dual-channel 1oo2 evaluation — pairs of inputs are cross-checked internally, eliminating single-point failures from reaching the safety function
- Integrated channel diagnostics — wire-break, short-circuit, and discrepancy errors are detected and reported to the F-CPU without additional hardware
- Flexible channel configuration — switch between 1oo1 (6 independent channels) and 1oo2 (3 redundant pairs) via STEP 7 Safety Advanced parameterization
- Hot-swap capable — module replacement without powering down the rack, minimizing unplanned downtime in continuous-process environments
- ATEX Zone 2 rated — suitable for use in potentially explosive atmospheres without additional barriers in many configurations
- Seamless STEP 7 / TIA Portal integration — F-blocks (F-FBs) are auto-generated; no manual safety coding required for standard safety functions
- Passivation & reintegration — on fault detection, the module passivates (outputs safe state) and can be reintegrated after fault clearance without CPU restart
Industry & Equipment Applications
- Automotive manufacturing: Robot cell safety door interlocks, press guard monitoring, emergency stop circuits on transfer lines
- Oil & gas / petrochemical: ESD (Emergency Shutdown) systems, wellhead control panels, compressor safety loops
- Chemical & pharmaceutical: Reactor interlock systems, agitator guard monitoring, clean-room access control with safety validation
- Food & beverage: Conveyor jam detection with safety-rated stop, filling line guard door monitoring
- Power generation: Turbine overspeed protection input chains, boiler safety interlock panels
- Packaging machinery: Safety light curtain input processing, two-hand control station monitoring
System Integration & Compatible Parts
The 6ES7336-1HE00-0AB0 is designed to operate within a validated SIMATIC S7-300 F-system. Typical bill of materials for a complete safety loop includes:
- F-CPU: 6ES7315-2FJ14-0AB0 (CPU 315F-2 PN/DP) or 6ES7317-2FK14-0AB0 (CPU 317F-2 DP)
- Power Supply: 6ES7307-1EA01-0AA0 (PS 307, 5 A) or 6ES7307-1KA02-0AA0 (PS 307, 10 A)
- Rack: 6ES7390-1AE80-0AA0 (UR2, 9-slot) or 6ES7390-1AF30-0AA0 (UR1, 18-slot)
- F-Digital Output Module: 6ES7326-2BF41-0AB0 (SM 326 DO 10 × 24 V DC / 2 A)
- Front Connector: 6ES7392-1BM01-0AA0 (40-pin screw terminal)
- PROFIBUS DP Interface: 6GK1500-0FC10 (bus connector for DP network)
Our Quality Assurance Process
Every 6ES7336-1HE00-0AB0 unit sourced through Konmask.com undergoes a structured verification process before dispatch:
- Origin traceability: Units are sourced from authorized distributors, OEM surplus channels, or verified industrial decommissions with documented provenance
- Visual & mechanical inspection: Housing integrity, connector pin condition, label legibility, and firmware version label verification
- Functional bench test: Where applicable, modules are powered and channel response is verified against Siemens published specifications
- Anti-counterfeit screening: Serial number cross-reference and hologram/label authentication against known Siemens production standards
- Packaging: ESD-safe anti-static bags, foam-lined cartons, and climate-controlled storage prior to shipment
How to Order
- Submit your inquiry via the Contact / RFQ form on this page with your required quantity and delivery timeline
- Our technical team confirms availability, lead time, and provides a formal quotation within 1 business day
- Upon PO confirmation, units are prepared, tested, and dispatched with full documentation (test report, packing list, commercial invoice)
- Shipping options: DHL Express, FedEx International Priority, sea freight for bulk orders — all with tracking
- Payment terms: T/T (bank transfer), PayPal, Western Union — flexible for verified B2B customers
Why Choose Konmask.com?
- Industrial automation specialists — we focus exclusively on PLC, DCS, HMI, and drive components; no generalist catalog noise
- Global sourcing network — access to surplus, new-old-stock, and current-production units across North America, Europe, and Asia
- Technical pre-sales support — our engineers can advise on compatibility, firmware requirements, and system configuration before you commit to a purchase
- Fast response SLA — RFQ responses within 24 hours; urgent requirements accommodated
- Trusted by MRO teams worldwide — serving maintenance, repair, and operations buyers across 40+ countries
Frequently Asked Questions
Q: Is the 6ES7336-1HE00-0AB0 compatible with both STEP 7 Classic and TIA Portal?
A: Yes. The module is fully supported in STEP 7 V5.5 SP4 and above with the S7 Distributed Safety add-on, and in TIA Portal V13 SP1 and above with the STEP 7 Safety Advanced option package.
Q: Can this module be used in a standard (non-failsafe) S7-300 rack?
A: No. The SM 336 F-module requires an F-CPU to operate its safety functions. It cannot be parameterized or used safely with a standard S7-300 CPU.
Q: What is the difference between 1oo1 and 1oo2 channel evaluation?
A: In 1oo1 mode, each of the 6 channels operates independently. In 1oo2 mode, channels are paired — both must agree on the input state for the safety function to proceed, providing higher fault detection coverage (DC) and enabling SIL 2 achievement with lower PFD.
Q: Do you supply the module with the front connector included?
A: Front connectors (6ES7392-1BM01-0AA0) are typically sold separately. Please specify in your RFQ if you require a complete kit including the front connector.
Q: What is the typical lead time for this part?
A: For in-stock units, dispatch is within 2–3 business days. For sourced units, lead time is typically 5–10 business days depending on origin. Urgent requirements can often be expedited — contact us directly.
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