SIEMENS 6ES7321-1BH82-0AA0 Digital Input Module – SIMATIC S7-300 Series
Imagine a critical production line suddenly going blind — sensors firing, actuators responding, but the PLC receiving no signal. Without a reliable digital input module, the entire control loop collapses: alarms go undetected, safety interlocks fail to trigger, and unplanned downtime cascades into costly shutdowns. The SIEMENS 6ES7321-1BH82-0AA0 is the front-line interface between your field devices and the S7-300 controller, ensuring every discrete signal — from limit switches to proximity sensors — is captured with precision and delivered without compromise.
Within the SIMATIC S7-300 ecosystem, the 6ES7321-1BH82-0AA0 occupies a well-established position as a 16-channel, 24 VDC digital input module. It is engineered for demanding industrial environments where signal integrity, noise immunity, and seamless integration with Siemens automation architecture are non-negotiable. Deployed across tens of thousands of installations worldwide — from automotive body shops to pharmaceutical packaging lines — this module represents the gold standard for discrete input acquisition in mid-range PLC systems.
Technical Specifications
- Order Number: 6ES7321-1BH82-0AA0
- Product Family: SIMATIC S7-300
- Module Type: Digital Input (SM 321)
- Number of Inputs: 16 DI
- Input Voltage: 24 VDC
- Input Current (per channel): Typical 7 mA at 24 VDC
- Isolation: Optocoupler isolation between field and backplane bus
- Backplane Bus: S7-300 standard backplane
- Dimensions (W×H×D): 40 mm × 125 mm × 120 mm
- Weight: Approx. 40 g (module only)
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: −40 °C to +70 °C
- Degree of Protection: IP20
- Standards: CE, UL, cULus
Note: All specifications are sourced from Siemens official documentation. Konmask.com does not fabricate or alter technical data.
Key Features & Benefits
- 16 Independent Digital Input Channels — maximizes I/O density per slot, reducing rack space and wiring complexity.
- 24 VDC Rated Input Voltage — compatible with the vast majority of industrial field devices and sensor outputs.
- Optocoupler Isolation — protects the CPU and backplane bus from field-side voltage spikes and ground loops.
- Plug-and-Play S7-300 Integration — recognized automatically by STEP 7 and TIA Portal; no additional configuration hardware required.
- Robust EMC Design — engineered to operate reliably in high-noise environments including variable frequency drives and welding equipment.
- Compact 40 mm Width — fits standard S7-300 racks without consuming excessive horizontal space.
- Long Service Life — designed for continuous 24/7 industrial operation with proven field reliability over decades.
Industry & Equipment Applications
- Automotive Manufacturing: Body welding lines, conveyor interlocks, door assembly stations
- Food & Beverage: Filling machine position sensing, packaging line end-of-travel detection
- Pharmaceutical: Clean-room equipment status monitoring, batch process safety interlocks
- Water & Wastewater: Pump run/fault feedback, valve open/close status
- Oil & Gas: Wellhead equipment monitoring, pipeline valve position feedback
- Material Handling: Conveyor belt sensors, pallet detection, sorter divert signals
- Building Automation: HVAC damper position, fire suppression system inputs
System Integration & Compatible Parts
The 6ES7321-1BH82-0AA0 is designed to operate within the SIMATIC S7-300 modular rack system. Typical companion components include:
- CPU Modules: 6ES7315-2EH14-0AB0, 6ES7317-2EK14-0AB0, 6ES7318-3EL01-0AB0
- Power Supply: 6ES7307-1BA01-0AA0, 6ES7307-1EA01-0AA0
- Digital Output Modules: 6ES7322-1BH01-0AA0, 6ES7322-1BL00-0AA0
- Analog Input Modules: 6ES7331-7KF02-0AB0, 6ES7331-7NF10-0AB0
- Front Connectors: 6ES7392-1AM00-0AA0 (20-pin), 6ES7392-1BM01-0AA0 (40-pin)
- Rack / Bus Connector: 6ES7390-1AE80-0AA0, 6ES7368-3BB01-0AA0
All compatible parts are available through Konmask.com. Contact us for bundle pricing on complete S7-300 rack assemblies.
Our Quality Assurance Process
Every unit of the 6ES7321-1BH82-0AA0 sourced through Konmask.com undergoes a rigorous multi-stage verification process before dispatch:
- Visual Inspection: Housing integrity, connector condition, label authenticity check against Siemens serial number databases.
- Functional Power-On Test: Module is energized and channel-by-channel input response is verified using calibrated test equipment.
- Firmware Version Check: Confirmed against Siemens official firmware revision records.
- Anti-Static Packaging: Shipped in ESD-safe bags with foam cushioning inside double-wall cartons.
- Documentation: Each shipment includes a test report and, where available, original Siemens datasheet.
How to Order
- Submit an Inquiry: Use the contact form on this page or email support@konmask.com with your required quantity and delivery timeline.
- Receive a Quote: Our team will respond within 1 business day with pricing, lead time, and availability confirmation.
- Confirm & Pay: We accept T/T (bank transfer), PayPal, and other B2B payment methods. Proforma invoice issued upon order confirmation.
- Shipment & Tracking: Orders are dispatched via DHL, FedEx, or UPS Express. Full tracking information provided within 24 hours of dispatch.
- After-Sales Support: 12-month warranty on all verified units. Technical support available via email and WhatsApp.
Why Choose Konmask.com?
- Specialized in Industrial Automation: We focus exclusively on PLC, DCS, HMI, and drive components — not a generalist marketplace.
- Verified Inventory: Every part is tested and authenticated before listing. No untested or unverified stock.
- Global B2B Experience: Serving engineering firms, system integrators, and MRO buyers across 40+ countries.
- Fast Response: Dedicated account managers respond to inquiries within 1 business day.
- Competitive Pricing: Direct sourcing relationships allow us to offer market-competitive prices without compromising authenticity.
- Secure Packaging & Reliable Logistics: ESD-safe, double-wall carton packaging with express courier options worldwide.
Frequently Asked Questions
Q1: Is the 6ES7321-1BH82-0AA0 compatible with TIA Portal?
A: Yes. The SM 321 digital input modules are fully supported in both STEP 7 Classic (V5.x) and TIA Portal (V13 and above) for S7-300 hardware configurations.
Q2: What is the difference between 6ES7321-1BH82-0AA0 and 6ES7321-1BH01-0AA0?
A: Both are 16-channel 24 VDC digital input modules for S7-300. The -1BH82 is a later hardware revision with updated firmware and minor design improvements. Always verify compatibility with your existing rack firmware before substitution.
Q3: Can this module be used in a fail-safe (F) system?
A: No. The 6ES7321-1BH82-0AA0 is a standard (non-fail-safe) digital input module. For SIL-rated applications, Siemens F-series modules (e.g., 6ES7326-1BK02-0AB0) are required.
Q4: Do you provide a warranty?
A: Yes. All units sold through Konmask.com carry a 12-month warranty covering functional defects. Units are tested prior to shipment and include a test report.
Q5: What is the typical lead time?
A: In-stock units ship within 1–3 business days. For larger quantities or special sourcing requests, lead time is typically 5–10 business days. Contact us for current availability.
Q6: Can I order a single unit?
A: Yes. Konmask.com accepts orders from single units to bulk quantities. MOQ is 1 piece.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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