Discrete I/O Control Solution — Siemens 6ES7323-1BH01-0AA0 | SM 323 Series
Where This Product Is Used
The Siemens 6ES7323-1BH01-0AA0 (SM 323) is a combined digital input/output module deployed across a wide range of industrial automation environments. Engineers specify this module wherever a compact, reliable, and cost-effective discrete I/O solution is required within a SIMATIC S7-300 control architecture.
- Automotive Assembly Lines — Body-in-white welding stations, conveyor interlocks, and end-of-line test rigs requiring deterministic I/O response.
- Packaging Machinery — Filling, capping, and labeling machines where sensor feedback and actuator control must coexist on a single module.
- Water & Wastewater Treatment — Pump station control panels, valve sequencing, and level-switch monitoring in harsh, moisture-prone environments.
- Food & Beverage Processing — Hygienic-area control cabinets managing conveyor drives, solenoid valves, and safety interlocks.
- Building Automation & HVAC — Air-handling unit control, chiller sequencing, and BMS integration via S7-300 gateway panels.
- Machine Tool & CNC Peripherals — Tool-change confirmation, door-lock monitoring, and coolant-pump control in machining centers.
- Oil & Gas Field Panels — Remote I/O expansion in wellhead control panels and compressor skids operating in Zone 2 classified areas (with appropriate enclosure).
Technical Specifications
| Parameter | Value |
|---|---|
| Order Number | 6ES7323-1BH01-0AA0 |
| Module Type | SM 323 — Digital Input/Output |
| Compatible System | SIMATIC S7-300 |
| Digital Inputs | 8 × DC 24 V |
| Digital Outputs | 8 × DC 24 V / 0.5 A (transistor, sourcing) |
| Input Voltage Range | 20.4 V DC … 28.8 V DC |
| Output Current per Channel | 0.5 A |
| Total Output Current | 4 A (per module) |
| Isolation | Optocoupler isolation between field and backplane bus |
| Input Delay (0→1) | 1.2 ms … 4.8 ms (configurable) |
| Input Delay (1→0) | 1.2 ms … 4.8 ms (configurable) |
| Backplane Bus Current Draw | 80 mA at 5 V DC |
| Power Dissipation | Typically 2.5 W |
| Dimensions (W × H × D) | 40 mm × 125 mm × 120 mm |
| Weight | Approx. 237 g |
| Operating Temperature | 0 °C … +60 °C |
| Storage Temperature | −40 °C … +70 °C |
| Degree of Protection | IP 20 |
| Mounting | DIN rail (S7-300 profile rail) |
| Firmware | Not applicable (hardware module) |
Why Engineers Specify This Model
- Unified I/O in One Slot — Combining 8 DI + 8 DO in a single 40 mm-wide module reduces rack space and wiring cost compared to separate input and output modules.
- Proven S7-300 Ecosystem Compatibility — Plug-and-play integration with all S7-300 CPUs (CPU 312 through CPU 319) and ET 200M distributed I/O stations.
- Configurable Input Filters — Adjustable input delay (1.2 ms to 4.8 ms) allows engineers to suppress contact bounce without additional hardware debounce circuits.
- Transistor Outputs for Fast Switching — Solid-state outputs eliminate relay wear, supporting high-cycle applications such as solenoid valves and indicator lamps.
- Diagnostic Capability — Supports process interrupts and diagnostic interrupts when configured in STEP 7 / TIA Portal, enabling predictive maintenance workflows.
- Long Production History — The -1BH01 revision is a mature, stable design with an extensive installed base, ensuring long-term spare-parts availability.
Complete System Bill of Materials
A typical S7-300 discrete control station incorporating this module includes:
- SIMATIC S7-300 Profile Rail (e.g., 6ES7390-1AE80-0AA0)
- PS 307 Power Supply 5 A (e.g., 6ES7307-1EA01-0AA0)
- S7-300 CPU (e.g., CPU 314C-2 DP — 6ES7314-6CG03-0AB0)
- SM 323 DI8/DO8 Module — 6ES7323-1BH01-0AA0 (this item)
- Front Connector 20-pin (6ES7392-1AJ00-0AA0) — required for field wiring
- Bus Connector (6ES7390-0AA00-0AA0) — one per module except last
- SIMATIC STEP 7 V5.x or TIA Portal V13+ for configuration
- 24 V DC field power supply (sized to total output load)
Compliance & Industry Standards
- CE Marking — Compliant with EU Low Voltage Directive and EMC Directive.
- UL / cUL Listed — Recognized for use in North American industrial control panels.
- IEC 61131-2 — Programmable controller hardware standard for digital I/O modules.
- ATEX / IECEx — Not intrinsically safe; suitable for Zone 2 only when installed in certified enclosures per IEC 60079-15.
- RoHS Compliant — Restriction of Hazardous Substances Directive (EU) 2011/65/EU.
- PROFIBUS DP — Compatible with ET 200M distributed I/O stations operating on PROFIBUS DP networks.
Quality Assurance & Sourcing
Konmask.com sources the 6ES7323-1BH01-0AA0 through verified industrial distribution channels with full traceability. Every unit offered is:
- Inspected for original Siemens holographic labeling and tamper-evident packaging.
- Tested for backplane bus communication and I/O channel continuity prior to dispatch.
- Stored in ESD-safe, climate-controlled warehousing to preserve module integrity.
- Accompanied by a 12-month warranty against manufacturing defects.
- Traceable to batch and date code for full supply-chain documentation.
How to Source This Part
Ready to order or need a formal quotation? Contact the Konmask technical team:
- Email: support@konmask.com
- Phone / WhatsApp: +0086 19859288691
- Lead Time: In-stock units ship within 1–3 business days; ex-stock orders confirmed same day.
- MOQ: 1 piece — no minimum order quantity for standard stock.
- Payment: T/T, PayPal, and major credit cards accepted.
- Export: DDP and DAP Incoterms available for international shipments.
Application-Specific FAQ
Q: Can the 6ES7323-1BH01-0AA0 be used with a CPU 315-2 PN/DP?
A: Yes. The SM 323 is compatible with all S7-300 CPUs. Simply insert it into any signal module slot on the profile rail and configure it in STEP 7 or TIA Portal.
Q: What front connector is required for field wiring?
A: The 20-pin front connector (6ES7392-1AJ00-0AA0) is required. It is sold separately and must be ordered alongside the module if not already available.
Q: Can outputs drive inductive loads such as solenoid valves?
A: Yes, with a suppression diode fitted across the load. The transistor outputs are rated at 0.5 A per channel and support inductive loads when properly protected.
Q: Is this module compatible with TIA Portal?
A: Yes. The SM 323 is supported in TIA Portal V13 and later under the S7-300 hardware catalog. GSD/HSP files are available from the Siemens Industry Online Support portal.
Q: What is the difference between 6ES7323-1BH00-0AA0 and 6ES7323-1BH01-0AA0?
A: The -1BH01 is the current production revision superseding the -1BH00. Functionally equivalent; the -1BH01 incorporates minor hardware revisions for improved EMC performance. Konmask stocks the current -1BH01 revision.
Q: Can I mix this module with analog modules in the same rack?
A: Yes. S7-300 racks support mixed digital and analog signal modules in any slot order (slots 4–11 on a standard rack).
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Contact: support@konmask.com | +0086 19859288691
