6ES7321-1BL00-0AA0 | Siemens SIMATIC S7-300 SM 321 Digital Input Module, 32 DI, 24 VDC, Isolated

Description

The Siemens 6ES7321-1BL00-0AA0 is an SM 321 digital input module for the SIMATIC S7-300 automation platform, providing 32 isolated 24 VDC inputs. Designed for DIN-rail mounting, it supports reliable signal acquisition in both centralized S7-300 racks and distributed ET 200M I/O stations. Its 40-pole connector interface enables high-density wiring in control cabinet environments.

Technical Specifications

Information About 6ES7321-1BL00-0AA0

The 6ES7321-1BL00-0AA0 is part of the SIMATIC S7-300 series, offering isolated digital input processing for machine and process automation applications. The module provides 32 channels for monitoring 24 VDC field signals, making it suitable for large I/O counts within compact installations. It can be used in standard S7-300 racks or ET 200M distributed I/O configurations via PROFIBUS or PROFINET interface modules. Typical uses include sensing pushbuttons, limit switches, sensors, and PLC-level input signals in manufacturing, material handling, and building automation systems.

Key Features

• 32 Isolated DC Inputs: Supports high-density 24 VDC signal acquisition.
• 40-Pole Connector: Accommodates multi-channel wiring in a compact footprint.
• S7-300/ET 200M Compatibility: Works in both central racks and distributed configurations.
• Reliable Isolation: Enhances noise immunity and channel protection.
• DIN-Rail Installation: Quick mounting within control cabinets.
• Modular Design: Integrates seamlessly with SIMATIC I/O modules and communication processors.
• Wide Application Use: Ideal for sensing switches, sensors, and automation field devices.

The 6ES7321-1BL00-0AA0 delivers the reliability and precision required for high-density digital input processing in SIMATIC S7-300 control systems.