• Siemens 6ES7321-1BL00-0AA0 S7-300 SM321 32DI 24V DC Input Module-YingZhou Automatization
  • Siemens 6ES7321-1BL00-0AA0 S7-300 SM321 32DI 24V DC Input Module-YingZhou Automatization
  • Siemens 6ES7321-1BL00-0AA0 S7-300 SM321 32DI 24V DC Input Module-YingZhou Automatization
  • Siemens 6ES7321-1BL00-0AA0 S7-300 SM321 32DI 24V DC Input Module-YingZhou Automatization
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SIEMENS

Siemens 6ES7321-1BL00-0AA0 S7-300 SM321 32DI 24V DC Input Module

Siemens 6ES7321-1BL00-0AA0 S7-300 SM321 32DI 24V DC Input Module

$557.99 USD
$557.99 USD
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Model Number
YingZhou Industrial Automation | Product Information

Siemens 6ES7321-1BL00-0AA0 SIMATIC S7-300 Digital Input Module

SM 321 | 32 Digital Inputs | 24V DC | Isolated Inputs | 40-Pin Connection
✓ IN STOCK & AVAILABLE TO ORDER  |  Actual Packaging Photos  |  Packaging Model Verified
Specification Verified Product Data
Manufacturer Siemens AG
Catalog Number 6ES7321-1BL00-0AA0
Product Family SIMATIC S7-300
Product Series SM 321
Product Type Digital Input Module
Digital Input Channels 32
Rated Input Voltage 24V DC
Input Isolation Yes
Input Grouping 16 Channels per Group
Isolation from Backplane Bus Yes, Optocoupler
Isolation Test Voltage 500V DC
Input Status Indicators Green LED per Input
Diagnostic Alarm No
Hardware Interrupt No
Diagnostic Function No
Required Front Connector 40-Pin
Module Width 40 mm
Module Height 125 mm
Module Depth 120 mm
Datasheet Approximate Weight 260 g
Commercial Net Weight 0.300 kg
Packaging Dimensions 12.80 x 15.00 x 5.00 cm
Packaging Quantity 1
EAN / GTIN 4025515060772
UPC 662643175493
Country of Origin Germany
Manufacturer Lifecycle PM400 - Product Phase-out Announced
Phase-out Effective Date October 1, 2023

Product Overview

The Siemens 6ES7321-1BL00-0AA0 is a SIMATIC S7-300 SM 321 digital input module manufactured by Siemens AG. It provides 32 digital input channels rated for 24V DC and is designed for digital signal acquisition within compatible SIMATIC S7-300 control systems. The input channels are electrically isolated in groups of 16, with optocoupler isolation between the input circuits and backplane bus. Each digital input has a green status indicator LED for visual signal monitoring. The module requires a 40-pin front connector for field wiring and features a housing measuring 40 mm wide, 125 mm high and 120 mm deep. Siemens specifies that this model does not provide diagnostic alarms, hardware interrupts or module diagnostic functions. Siemens lists the catalog number under PM400 product lifecycle status, with product phase-out announced effective October 1, 2023. The supplied actual packaging photographs identify the product as 6ES7321-1BL00-0AA0, with the description SIMATIC S7-300 SM321 DI 32xDC 24V, packaging date 04.2018, FS 07 and Made in Germany. The physical module and 40-pin front connector are not visible in the supplied photographs. Before ordering, confirm the exact catalog number, S7-300 system requirements, wiring configuration, connector availability and device condition.

Key Product Features

  • SIMATIC S7-300 Digital Input Module — Siemens SM 321 module for industrial PLC digital signal acquisition.
  • 32 Digital Input Channels — Provides thirty-two digital inputs for 24V DC signals.
  • Electrically Isolated Input Groups — Inputs arranged in groups of 16 with isolation from the backplane bus.
  • 40-Pin Front Connector Interface — Designed for field wiring using the specified front connector.
  • Input Status LEDs — Individual green digital input status indicators.
  • Compact S7-300 Module Housing — Manufacturer-specified dimensions of 40 x 125 x 120 mm.
  • Exact-Model S7-300 Spare Part — Suitable for procurement involving the specified SM 321 catalog number and verified control-system requirements.

Actual Product Verification

✓ Actual Siemens product packaging photographs supplied
✓ Packaging catalog number: 6ES7321-1BL00-0AA0
✓ Packaging manufacturer: SIEMENS
✓ Packaging product family: SIMATIC S7-300
✓ Packaging module series: SM321
✓ Packaging product type: Digital Input Module
✓ Packaging designation: DI 32xDC 24V
✓ Packaging quantity: 1
✓ Packaging date: 04.2018
✓ Packaging FS marking: 07
✓ Packaging EAN: 4025515060772
✓ Packaging identifies Made in Germany
✓ Requested catalog number matches the photographed packaging
✓ Physical module identification is not visible in the supplied photographs
✓ Physical 40-pin front connector inclusion has not been verified
✓ Confirm module nameplate, connector, unit condition and final package contents before dispatch

In Stock & Available to Order

Siemens 6ES7321-1BL00-0AA0 is marked in stock based on the supplied inventory information. This SIMATIC S7-300 SM 321 digital input module is offered for industrial automation maintenance, PLC spare-part procurement and exact-model replacement requirements. Siemens has announced the product phase-out under PM400 lifecycle status, making exact catalog-number confirmation important for replacement purchasing. Actual Siemens packaging photographs are available for reference, showing the module designation, manufacturing origin, package date and FS marking. Please confirm the 32-channel 24V DC input configuration, compatible S7-300 system, required 40-pin front connector, physical module identity, accessories and shipping arrangements before completing an order. The front connector should not be assumed to be included unless separately confirmed.

IN STOCK

Siemens 6ES7321-1BL00-0AA0

Contact us for exact-model verification, multiple units and industrial PLC replacement sourcing. Please confirm the SIMATIC S7-300 model, 32 digital inputs, 24V DC rating, 40-pin connector requirements and module condition before ordering.

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