PART NUMBER SEARCH
AMIKONG EXCESS CONTROL SYSTEM PARTS
Specializing In:Automation Spares(DCS, PLC, CNC) Servo Drives HMI Power supplies Controllers
-
Please try to be as accurate as possible with your search.
-
We can quote you on 1000s of specialist parts, even if they are not listed on our website.
-
We can't find any results for “”.
SEE PRODUCTS IN SEARCH PAGE ()
- Home
- ALL MANUFACTURERS
- Siemens
- Siemens Simatic S7
- S7-300
- 6ES7321-1BL00-0AA0
Fast Shipping Available
· Product image is representative; revision or series may vary. Contact us to request a specific version.
- Customs & Documentation
- We prepare clear, order-specific documentation for every international shipment, including the commercial invoice, packing list and available product or compliance documents. Before dispatch, our logistics team confirms the consignee details, declared value, shipping terms and destination requirements with you. Tracking information is provided after shipment, helping your team prepare for import clearance with confidence.
Documents checked before dispatch · Shipment details confirmed · Global tracking provided
- Payment
- Payment is by bank wire only in RMB/CNY, GBP, EUR or USD. Amikon does not accept credit cards or provide credit terms. Cleared payment is required before shipment unless the written quotation expressly states otherwise.
- Product Condition
- Factory New These are new and current items that are procured directly from the manufacturer.
New In Sealed Package Parts are new. They have not been used and still have their original package seal intact.
New in Original Package These parts are new. The packages were not originally sealed by their original manufacturer.
-
20+
years in automation -
ISO 9001
certified quality system -
12 months
amikon warranty -
2-hour reply
from your account manager -
Success Story
solutions in action
-
Please try to be as accurate as possible with your search.
-
We can quote you on 1000s of specialist parts, even if they are not listed on our website.
-
We can't find any results for “”.
SEE PRODUCTS IN SEARCH PAGE ()
PRODUCT DESCRIPTION
Thirty-two DC inputs for S7-300 signal acquisition
Siemens 6ES7321-1BL00-0AA0 is an SM 321 digital input module for SIMATIC S7-300. It receives 32 discrete signals at a nominal 24 V DC and connects field wiring through a 40-pin front connector, with channels separated into two isolated groups.
The module accepts signals from switches and compatible proximity sensors. Green indicators show individual input states, while optical isolation separates the field inputs from the backplane. Its fixed input delay supports standard discrete signal acquisition without configurable diagnostic alarms or hardware interrupts.
The module accepts signals from switches and compatible proximity sensors. Green indicators show individual input states, while optical isolation separates the field inputs from the backplane. Its fixed input delay supports standard discrete signal acquisition without configurable diagnostic alarms or hardware interrupts.
BEFORE YOU BUY
Confirm the complete installed configuration
ACTUAL APPLICATIONS
Where 6ES7321-1BL00-0AA0 Fits Across Industrial Sectors
Industrial uses span production, processing and utility operations, subject to compatible configuration and the applicable engineering requirements.
-
01 · FOOD & BEVERAGE
Food Manufacturing and Commercial Beverage Production
Food processing and preparation for packaged consumer food products.Beverage production and filling for commercial drinks manufacturing operations. -
02 · PACKAGING
Consumer Goods Packaging and Industrial Product Packing
Consumer goods packaging for retail distribution and product presentation.Industrial product packing and handling across commercial manufacturing operations. -
03 · WATER & WASTEWATER
Drinking Water Supply and Municipal Wastewater Treatment
Drinking water production and distribution for municipal supply services.Wastewater collection and treatment across municipal and industrial operations.
Technical specifications for 6ES7321-1BL00-0AA0
-
Product Model6ES7321-1BL00-0AA0
-
Product Parameters32-Channel Digital Input Module
-
ManufacturerSiemens
-
Digital inputs32
-
Rated input voltage24 V DC
-
Input characteristicIEC 61131 Type 1
-
Signal-state voltage thresholdsSignal 0: -30 to +5 V; signal 1: 13 to 30 V
-
Input current at signal 17 mA typical
-
Input delay1.2 to 4.8 ms for either transition; not parameterizable
-
Backplane current consumption15 mA maximum from 5 V DC backplane
-
Typical power loss6.5 W
-
Isolation arrangementGroups of 16 inputs; isolated from backplane by optocouplers
-
Isolation test voltage500 V DC
-
Front connector40-pin
-
Signal cable limits1,000 m shielded; 600 m unshielded
-
Two-wire sensor quiescent current1.5 mA maximum
-
Simultaneously active inputsHorizontal: 32 up to 40 °C, 16 up to 60 °C; vertical: 32 up to 40 °C
-
Input status indicationOne green LED per channel
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 INPUTS
Discrete signal acquisition with two isolated input groups
The SM 321 adds 32 nominal 24 V DC digital inputs to a SIMATIC S7-300 installation. Its channels occupy four input bytes, and the terminal-assignment figure identifies their relationship to the front connector.
Two groups of 16 channels provide electrical separation between potential groups, while optocouplers separate the inputs from the backplane. Field wiring must follow the designated reference connections shown in the exact-model diagram.
Commissioning checks include the input voltage thresholds, sensor quiescent current and simultaneous-channel limits for the mounting position. Green channel indicators provide local signal-state indication; diagnostic alarms and hardware interrupts are not provided.
Features:
- Four input bytes
- Two 16-channel potential groups
- Green channel status indication
The Siemens 6ES7321-1BL00-0AA0 requires the documented channel arrangement, electrical limits and connector assignment to be verified before system integration and commissioning.
INTERCHANGEABILITY
Verify the complete replacement identity before commissioning
Match the complete 6ES7321-1BL00-0AA0 order number and the installed hardware configuration. A shared SM 321 family designation alone does not establish the same channel count, voltage or front-connector assignment.
Verify the 40-pin connector, four-byte input mapping and separate 16-channel potential groups before restoring wiring. Check that existing sensor signals remain within the specified voltage thresholds and quiescent-current limit.
Siemens' current indexed data sheet identifies this model as a spare part. Migration to a different I/O platform requires its own engineering assessment; the sources reviewed do not establish an unrestricted drop-in replacement.
Features:
- Exact complete order number
- Connector and input mapping
- Mounting and active-channel limits
The Siemens 6ES7321-1BL00-0AA0 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 manufacturer data and relevant original manual pages
- Installation reference includes the verified original wiring drawings
- Accessories and supplied documentation follow the written quotation
Documentation for the Siemens 6ES7321-1BL00-0AA0 includes an independent technical summary and selected original manufacturer pages; check the applicable document edition against the delivered module and approved project wiring.
Also searched as
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
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
-
01
Shipping & delivery
-
DispatchEligible stock: same / next day
-
CarriersDHL, FedEx or UPS
-
Ship fromXiamen, China
-
Packed size12.80 x 15.00 x 5.00 cm
-
Shipping weightConfirm final packed weight
-
-
02
Payment & customs
-
PaymentBank transfer (T/T)
-
CurrenciesUSD · EUR · GBP · RMB
-
Credit cardsNot accepted
-
HS reference8538900000
-
OriginConfirm supplied-unit origin
-
-
03
Warranty & returns
-
Warranty12 months from AMIKON
-
InspectionLabel, condition and packing checks
-
ReturnsPrior RMA authorisation required
-
CompatibilityConfirm before order
-
OEM warrantyDoes not apply
-
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
-
Part checked
Full suffix recorded -
Condition checked
Label and appearance -
Packing checked
Antistatic protection -
Tracking supplied
Established couriers -
Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 6ES7321-1BL00-0AA0
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
-
What input signals does 6ES7321-1BL00-0AA0 accept?
It accepts 32 nominal 24 V DC digital signals from switches and compatible two-, three- or four-wire proximity switches. The signal-1 range is 13 to 30 V and the signal-0 range is -30 to +5 V. -
Are all 32 inputs individually isolated?
No. The inputs are isolated in two groups of 16, with optical separation from the backplane. Individual channels within a group do not have separate channel-to-channel isolation. -
Which front connector is required?
The module requires a 40-pin front connector. Its input addresses span four consecutive input bytes; use the exact wiring and terminal-assignment diagram in section 3.7 of the Siemens module manual. -
Can all channels remain active at 60 °C?
Not in the specified horizontal 60 °C operating condition: the documented maximum is 16 simultaneously active inputs. All 32 are permitted for horizontal mounting up to 40 °C and vertical mounting up to 40 °C. -
Does this module provide programmable input filtering or diagnostic interrupts?
The input delay is fixed at 1.2 to 4.8 ms for both transitions. This order number does not provide diagnostic alarms or hardware interrupts; input status is shown by green channel LEDs. -
What wiring lengths and two-wire sensor leakage limits apply?
The documented cable limits are 1,000 m for shielded wiring and 600 m for unshielded wiring. Compatible two-wire proximity sensors must not exceed the specified 1.5 mA quiescent current.
READY TO VERIFY YOUR PART?
Get a 6ES7321-1BL00-0AA0 quote with price, lead time and revision check.
Trusted by 5,000+ plants worldwide | Backed by our vast inventory of top-tier control parts, drives and servo motors, fast shipments are dispatched to cover your urgent needs. ABOUT US >>
Disclaimer: Amikon Limited sells new and surplus products and develops channels for purchasing such products. Amikon Limited is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because Amikon Limited is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. Amikon Limited is not an authorized distributor, dealer, or representative of the products displayed on this website. All product names, trademarks, brands, and logos used on this website are the property of their respective owners. The description, explanation, or sale of products with these names, trademarks, brands, and logos is for identification purposes only and is not intended to indicate any association with or authorization from any rights holder.
Product
Product Browsing History
- Q&A
- Policies How to order Part status information Shipping Method Return Policy Warranty Policy Payment Terms Email Marketing Policy VAT and Import Information
- Asset Recovery
- We Buy Your Equipment. Industry Success stories Amikong News Technical Resources Why choose us FAQs
- Registered Address
-
32D Guomao Building, No.388, Hubin south Road, Siming district, Xiamen,Fujian, China
