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Siemens Digital Input 32xDC24V 6ES7321-1BL00-0AA0

  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
  • Siemens Digital Input 32xDC24V 321-1BL00-0AA0
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Siemens Digital Input 32xDC24V 6ES7321-1BL00-0AA0

€300,00
€300,00
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Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0Siemens Digital Input 32xDC24V 321-1BL00-0AA0

Siemens SIMATIC S7-300 SM 321 Digital Input Module, 32 DI, 24V DC — 6ES7321-1BL00-0AA0 — Lot of 5

Isolated 32-point digital input module, 40-pole front connector

Overview

This lot is 5 units of the Siemens SIMATIC S7-300 SM 321, part no. 6ES7321-1BL00-0AA0, an isolated digital input module providing 32 digital input channels at 24V DC, grouped into sets of 16 for optocoupler-based potential separation from the backplane bus. Suitable for switches and 2-, 3-, or 4-wire proximity switches (BEROs), it connects via a single 40-pole front connector and supports both switches and 2-wire sensors with low quiescent current tolerance, making it well suited for high-density digital input requirements in S7-300 automation systems.

Key Features

  • High-density 32-input capacity: Consolidates a large number of digital inputs into a single module, grouped in sets of 16.
  • Optocoupler isolation: Potential separation between channels and the backplane bus for enhanced noise immunity.
  • Compatible with switches and proximity sensors: Supports 2-, 3-, and 4-wire proximity switches (BEROs) in addition to standard contact switches.
  • Long cable length support: Up to 1000m shielded / 600m unshielded for extended field wiring runs.
  • IEC 61131 Type 1 input characteristic curve: Standard-compliant input response for predictable system behavior.
  • Low power loss: Typ. 6.5W, contributing to efficient panel thermal management.

What's Included

Model Function Qty
SM 321 (6ES7321-1BL00-0AA0) Digital input module, 32 DI, 24V DC, isolated 5

Technical Specifications

Supply voltage: 24V DC (rated); permissible range 20.4-28.8 V DC.

Power loss: Typ. 6.5 W.

Number of digital inputs: 32, isolated in groups of 16.

Input characteristic curve: IEC 61131 Type 1.

Input voltage type: DC, 24V rated.

2-wire sensor compatibility: Yes (max. quiescent current 1.5mA).

Backplane bus current (5V DC): Max. 15 mA.

Input delay: 1.2ms (min.) to 4.8ms (max.).

Cable length: Shielded, max. 1000m; unshielded, max. 600m.

Connection: 1x 40-pole front connector.

Dimensions / weight: 12 x 4 x 12.5 cm; approx. 260 g.

Compatibility & Applications

Part of Siemens' SIMATIC S7-300 SM 321 module family, this digital input module is well suited to industrial automation applications requiring high-density digital signal acquisition, such as monitoring pushbuttons, limit switches, and proximity sensors in manufacturing, material handling, and building automation systems, whether in central S7-300 racks or distributed ET 200M I/O configurations.

A1Customer — Industrial Automation Equipment | Tampere, Finland
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