6ES7321-1BH02-0AA0
SIMATIC S7-300 SM 321 digital input module, isolated, 16 digital inputs, 24 V DC, 1 × 20-pin front connector — genuine article supplied by SENTRADO through authorized channels, with 24-hour response on stock and lead time for customers worldwide.
Genuine 6ES7321-1BH02-0AA0 from SENTRADO
The S7-300 SM 321 digital input module — 16 isolated 24 V DC digital inputs for reading sensor and switch signals in installed S7-300 and ET 200M stations. We supply this article as a genuine Siemens product sourced through authorized channels, exported with FOB, CIF or DDP terms and full export documentation. We reply within 24 hours with a human response on stock and lead time — contact us for live stock & lead time.
SENTRADO (Beijing Xinshentuo Technology Co., Ltd.) is the export and international-project arm of a Siemens Certified System Integrator (Professional), certificate no. FY26CSI91110105801731460A, with 25+ years of control-cabinet and system-integration experience.
Supply assurance
Genuine, authorized-channel supply
Every unit is a genuine 6ES7321-1BH02-0AA0 article sourced through authorized channels, with full export documentation.
Certified integrator background
SENTRADO operates as the export and international-project arm of a Siemens Certified System Integrator (Professional), certificate no. FY26CSI91110105801731460A, with 25+ years of control-cabinet experience.
24-hour human response
We reply within 24 hours to confirm stock and lead time — contact us for live stock & lead time before ordering.
Sources: official manufacturer product pages and technical documentation.
Technical specifications
Parameters below are taken from the official Siemens SIOS technical data sheet / Industry Mall entry for 6ES7321-1BH02-0AA0.
| Product | SIMATIC S7-300 SM 321 digital input module, isolated |
|---|---|
| Inputs | 16 digital inputs, 24 V DC (isolated, group of 16) |
| 2-wire sensor support | Yes, permissible quiescent current max. 1.5 mA |
| Isolation | Channels to backplane bus via optocoupler, tested 500 V DC |
| Front connector | 1 × 20-pin |
| Supply / load voltage | 24 V DC (L+) |
| Power loss | Typ. 3.5 W |
| Dimensions (W × H × D) | 40 × 125 × 120 mm |
| Weight | Approx. 200 g |
| Mounting | S7-300 profile rail / ET 200M rack |
Only parameters and family facts confirmed on official Siemens sources are listed. Contact our engineers for configuration checks, accessories and compatibility with your installed system.
Compatibility & supply
Three ways our team supports your 6ES7321-1BH02-0AA0 requirement: genuine component supply, engineering/configuration checks and complete-BOM handling.
Genuine article for installed systems
We supply the genuine 6ES7321-1BH02-0AA0 (SIMATIC S7-300 SM 321 digital input module, isolated, 16 digital inputs, 24 V DC, 1 × 20-pin front connector) sourced through authorized channels. Share your controller, drive or panel article numbers and our engineers verify compatibility with your installed system before shipment.
Engineering & compatibility checks
Direct swap-in for installed SM 321 16-channel 24 V DC input modules in S7-300 racks and ET 200M stations. It provides 16 isolated digital inputs at 24 V DC, supports 2-wire sensors and uses one 20-pin front connector. Send us your CPU/rack article number and the front-connector type and we verify the module and accessories. Our engineers support configuration checks and program handling before shipment.
Accessories & complete BOM
We can quote the complete bill of materials — controllers, panels, modules, power supplies and accessories — in one shipment with export-grade packaging and full documents.
Typical applications
A 16-channel 24 V DC digital input module for installed S7-300 and ET 200M stations.
- S7-300 central/expansion rack digital inputs
- ET 200M distributed I/O stations
- Sensor and proximity-switch signal acquisition
- 2-wire sensor inputs (BERO)
- Machine status and limit-switch monitoring
- Retrofit and extension of installed systems
Supply & delivery
Genuine & sourced right
Genuine Siemens products sourced through authorized channels, with export documentation. No grey-market ambiguity.
24-hour response
Every inquiry gets a human reply within 24 hours confirming stock and lead time. Formal quotations follow manufacturer inquiry.
Stock & lead time
Availability changes daily. Contact us for live stock & lead time — express air freight for line-down emergencies.
Global export
Worldwide shipping on FOB, CIF or DDP terms with export-grade packaging and full documents — Middle East, Southeast Asia, Africa and South America.
Frequently asked questions
Is the 6ES7321-1BH02-0AA0 a genuine Siemens part?
How fast do you respond, and what about lead time?
How do I confirm compatibility with my S7-300 / ET 200M station?
What is this input module typically used for?
What about warranty, MOQ and international shipping?
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Need 6ES7321-1BH02-0AA0 fast?
Send us the article number and quantity — we reply within 24 hours with stock and lead-time confirmation. Contact us for live stock & lead time.