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PRODUCT DESCRIPTION
Sixteen optically isolated digital inputs for 24 V DC signals
The Siemens 6ES7321-1BH01-0AA0 is an SM 321 digital input module in the SIMATIC S7-300 range. It provides sixteen 24 V DC inputs with optical isolation and a 20-pin connection for field-signal input in compatible installations.
Siemens released-module documentation lists the inputs as one group of sixteen. The historical ET 200M configuration catalog allocates one slot to this order number and states 25 mA consumption from the backplane bus, identifying its allocation within that distributed I/O configuration.
Siemens released-module documentation lists the inputs as one group of sixteen. The historical ET 200M configuration catalog allocates one slot to this order number and states 25 mA consumption from the backplane bus, identifying its allocation within that distributed I/O configuration.
BEFORE YOU BUY
Confirm the complete installed configuration
ACTUAL APPLICATIONS
Where 6ES7321-1BH01-0AA0 Fits Across Industrial Sectors
Industrial uses span production, processing and utility operations, subject to compatible configuration and the applicable engineering requirements.
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01 · FOOD & BEVERAGE
Commercial Food Manufacturing and Beverage Processing Operations
Manufacturing packaged foods for domestic and international consumer markets.Processing beverages for commercial distribution and everyday consumer demand. -
02 · METALS PRODUCTION
Metal Processing and Aluminum Sheet Production Operations
Rolling and finishing metal materials for industrial manufacturing demand.Production of aluminum sheet for commercial and industrial markets. -
03 · PACKAGING
Consumer Product Packaging and Commercial Goods Packing
Consumer product packaging for retail presentation and market distribution.Commercial goods packing for storage, shipment and industrial supply.
Technical specifications for 6ES7321-1BH01-0AA0
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Product Model6ES7321-1BH01-0AA0
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Product ParametersS7-300 SM 321 Digital Input Module
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ManufacturerSiemens
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Module functionSM 321 digital input module
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Digital inputs16
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Nominal input voltage24 V DC
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IsolationOptically isolated
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Connection20-pin
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Input grouping16 inputs per group
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Backplane current25 mA listed in the historical ET 200M configuration catalog
View all additional
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
SIMATIC S7-300 DIGITAL INPUT
Sixteen input signals within a documented module group
The SM 321 provides 16 digital inputs with a nominal input rating of 24 V DC. Siemens identifies optical isolation and a 20-pin connection for this exact order number.
The released-module list records a group of 16 inputs. Detailed terminal assignments and electrical limits must come from documentation explicitly applicable to the installed 1BH01 version.
The historical ST 40 catalog lists this module in an ET 200M configuration using one slot in the signal-module area. Its stated backplane consumption is 25 mA.
Features:
- 16 digital inputs with nominal 24 V DC rating
- 20-pin connection and optical isolation
- Historical ET 200M configuration listing
The Siemens 6ES7321-1BH01-0AA0 requires the documented hardware configuration, installation conditions and interface arrangement to be verified before system integration and commissioning.
INTERCHANGEABILITY
Verify the complete replacement identity before commissioning
Match the full 6ES7321-1BH01-0AA0 order number and record the installed station configuration before selecting a replacement. A similar module name does not establish identical electrical behavior.
Check the input count, nominal voltage, connection size and documented grouping. Keep the existing circuit documentation available for the qualified personnel responsible for replacement.
Do not transfer 1BH10 or 1BH02 electrical limits into this module's reference. The reviewed sources establish basic identity and historical configuration, not a universal drop-in replacement or a verified wiring procedure.
Features:
- Complete 1BH01 order-number matching
- Documented input and connection checks
- No inferred cross-variant electrical equivalence
The Siemens 6ES7321-1BH01-0AA0 requires replacement verification based on its complete order number, installed hardware, signal configuration and project documentation.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: Official documents are provided through manufacturer links. Accessories, manuals, cables, calibration data, software, certificates, and other items are not included with this equipment unless listed in the stock item description.Features:
- Exact-model product facts and original Siemens catalog references
- Selected original Siemens released-module catalog pages; no verified installation drawing or installation PDF is supplied.
- Accessories and supplied documentation follow the written quotation
Documentation for the Siemens 6ES7321-1BH01-0AA0 includes an independent technical summary and selected original manufacturer pages; check the applicable document edition against the delivered product and approved installation documentation.
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Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed sizeConfirm final packed dimensions
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Shipping weightConfirm final packed weight
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference8538900000
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OriginConfirm supplied-unit origin
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 6ES7321-1BH01-0AA0
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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What type of module is this order number?
It is the Siemens SIMATIC S7-300 SM 321 digital input module identified by the complete order number 6ES7321-1BH01-0AA0. -
How many inputs and what nominal voltage are documented?
The manufacturer lists 16 digital inputs for 24 V DC signals. -
Which connection size is specified?
The exact-order-number product description specifies a 20-pin connection. Terminal assignments require the applicable installation documentation. -
How are the inputs grouped?
The Siemens released-module list identifies grouping of 16 for this model. Do not copy the properties of neighboring variants in the same table. -
Is historical ET 200M use documented?
Yes. The ST 40 catalog lists this exact order number in its ET 200M configuration table, occupying one signal-module slot. This historical listing does not establish support in every later configuration. -
What backplane current is supported by the reviewed source?
The historical ET 200M catalog lists 25 mA for this exact order number. It does not label that value as a maximum. A 1BH10 data sheet is not valid evidence for 1BH01.
READY TO VERIFY YOUR PART?
Get a 6ES7321-1BH01-0AA0 quote with price, lead time and revision check.
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