Siemens 6ES7322-1HF10-0AA0 SM322 Digital Output Module | Replacement, Equivalent & Selection Guide
The Siemens 6ES7322-1HF10-0AA0 is an SM322 series digital output (DO) module for the SIMATIC S7-300 programmable logic controller platform. It provides 8 transistor outputs at DC 24 V / 2 A, making it a reliable choice for driving solenoid valves, contactors, indicator lamps, and other DC actuators in industrial automation systems. This page serves as a comprehensive selection, replacement, and compatibility reference for procurement engineers and system integrators.
Technical Specifications
- Order Number (MLFB): 6ES7322-1HF10-0AA0
- Series: SM322 — Signal Module, Digital Output
- Platform: SIMATIC S7-300
- Number of Outputs: 8 channels
- Output Type: Transistor (sourcing), DC 24 V / 2 A per channel
- Total Current per Module: Max. 8 A
- Isolation: Optocoupler isolation between field side and backplane bus
- Output Voltage Range: DC 20.4 V – 28.8 V
- Short-Circuit Protection: Yes (electronic)
- Backplane Bus Current Consumption: 80 mA (5 V DC)
- Power Dissipation: Approx. 4.5 W
- Dimensions (W×H×D): 40 × 125 × 120 mm
- Weight: Approx. 320 g
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: −40 °C to +70 °C
- Degree of Protection: IP20
- Certifications: CE, UL, cULus, FM
Compatible Replacement & Equivalent Models
When the 6ES7322-1HF10-0AA0 is unavailable or requires a cost-effective alternative, the following models offer functional compatibility or direct replacement capability:
- 6ES7322-1BH01-0AA0 — SM322, 16×DC24V/0.5A; higher channel count, lower per-channel current; suitable when load current ≤ 0.5 A per point
- 6ES7322-1BH10-0AA0 — SM322, 16×DC24V/0.5A (updated firmware revision); direct functional equivalent for 16-channel applications
- 6ES7322-1CF00-0AA0 — SM322, 8×AC120/230V; relay-free AC output alternative for AC actuator loads
- 6ES7322-5HF00-0AB0 — SM322, 8×DC24V/2A with diagnostics; drop-in upgrade with fault detection capability
- 6ES7322-1FF01-0AA0 — SM322, 8×DC24V/2A (relay); relay output variant for mixed AC/DC or inductive loads
- Third-party compatible modules — Various OEM-compatible SM322 form-factor modules are available; contact Konmask for verified cross-reference sourcing
Note: Always verify backplane bus current budget, output current rating, and firmware compatibility before substitution in a live system.
Why Choose the Original Model
- Guaranteed Siemens quality: Factory-tested, CE/UL certified, and fully supported by Siemens TIA Portal and STEP 7 software
- 2 A per channel: Higher per-channel current than the 0.5 A variants — essential for solenoid valves and contactors
- Electronic short-circuit protection: Reduces field wiring damage risk and simplifies fault recovery
- Compact 40 mm width: Maximizes rack density in space-constrained control cabinets
- Long-term availability: Established S7-300 platform with broad spare-parts ecosystem
Typical Applications
- Solenoid valve control in pneumatic and hydraulic systems
- Contactor and motor starter switching
- Indicator lamp and HMI signal driving
- Conveyor and material handling control
- Packaging machinery and filling lines
- Water treatment and HVAC automation
- Discrete manufacturing and assembly lines
System Compatibility
- PLC Platform: SIMATIC S7-300 (all CPU variants with S7-300 backplane)
- Racks: UR1, UR2, ER1, ER2 expansion racks
- Programming Software: SIMATIC STEP 7 V5.x, TIA Portal V13 and above
- Bus Interface: S7-300 backplane bus (not compatible with S7-400 or S7-1500 racks)
- Front Connector: 20-pin front connector (order separately: 6ES7392-1AJ00-0AA0)
Selection Guide
Use the following criteria to select the correct SM322 digital output module for your application:
- Load voltage: DC 24 V → choose transistor output variants (6ES7322-1HF10-0AA0, 1BH01, 1BH10); AC 120/230 V → choose 6ES7322-1CF00-0AA0
- Load current per point: ≤ 0.5 A → 16-channel variants (1BH01/1BH10); up to 2 A → 8-channel variants (1HF10-0AA0, 5HF00)
- Diagnostics required: Yes → 6ES7322-5HF00-0AB0 (with process alarm and diagnostic interrupt)
- Inductive / mixed loads: Consider relay output variant 6ES7322-1FF01-0AA0
- Channel count: 8 outputs → 1HF10-0AA0; 16 outputs → 1BH01/1BH10; 32 outputs → 6ES7322-1BL00-0AA0
Quality Assurance & Sourcing
All modules supplied by Konmask.com are sourced through verified industrial distribution channels. Each unit undergoes:
- Visual inspection and label verification against Siemens MLFB coding standards
- Functional power-on test prior to shipment
- Anti-static packaging with humidity indicator card
- Certificate of conformity available on request
We supply both new original and factory-refurbished units. Refurbished units are clearly labeled and carry a 90-day warranty. New original units carry the full Siemens warranty.
How to Order
- Part Number: 6ES7322-1HF10-0AA0
- Minimum Order Quantity: 1 piece
- Lead Time: In-stock items ship within 1–3 business days; ex-stock orders confirmed at time of inquiry
- Payment: T/T, PayPal, credit card (via Shopify Payments)
- Shipping: DHL, FedEx, UPS worldwide; sea freight available for bulk orders
- Request a Quote: Contact support@konmask.com for volume pricing or urgent requirements
Replacement & Compatibility FAQ
Q: Can I replace 6ES7322-1HF10-0AA0 with 6ES7322-1BH01-0AA0?
A: Functionally yes for loads ≤ 0.5 A per channel. The 1BH01 has 16 channels at 0.5 A vs. 8 channels at 2 A. Verify your load current before substitution.
Q: Is this module compatible with S7-1500?
A: No. The SM322 series is designed exclusively for the S7-300 backplane. S7-1500 uses a different module form factor (SM series with U-connector).
Q: Does the module require a separate front connector?
A: Yes. The 20-pin front connector (6ES7392-1AJ00-0AA0) must be ordered separately for field wiring.
Q: What is the difference between 6ES7322-1HF10-0AA0 and 6ES7322-5HF00-0AB0?
A: The 5HF00-0AB0 adds diagnostic capability (process alarm, short-circuit detection reporting to CPU). Electrically they are equivalent for standard DO applications.
Q: Can Konmask source discontinued or long lead-time Siemens modules?
A: Yes. Contact us with your part number and quantity — we maintain access to authorized distributor stock and certified refurbished inventory globally.
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