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Siemens SIMATIC S7-300 Digital Input Module SM 321 - 8DI, 120/230V AC

Siemens SIMATIC S7-300 SM 321 Digital Input Module - 8DI, 120-230V AC

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ManufacturerSiemens

Part number6ES7321-1FF10-0AA0

Type Digital Input Module

Series SIMATIC S7-300 SM 321

Channels 8 DI

Input Voltage 120 V AC / 230 V AC

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12-month warranty

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Veteran-owned

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8 Isolated Digital Inputs 120-230V AC Operation For SIMATIC S7-300 SM 321 Module Type Single Rooting per Channel High Reliability

Product description

The Siemens 6ES7321-1FF10-0AA0 is a SIMATIC S7-300 Digital Input (DI) module, model SM 321. This module provides 8 isolated digital input channels that operate with AC voltages between 120V and 230V. It features a 40-pole connector and supports single rooting per channel for clear wiring and diagnostics.

This module is designed for use in the SIMATIC S7-300 PLC system, commonly found in industrial automation for process control, machine building, and building automation applications. It's used to interface external AC signals such as limit switches, pushbuttons, or status indicators with the PLC.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 6ES7321-1FF10-0AA0. Equip your S7-300 system with reliable input modules from our extensive inventory.

Technical specifications

Type	Digital Input Module
Series	SIMATIC S7-300 SM 321
Channels	8 DI
Input Voltage	120 V AC / 230 V AC
Isolation	Isolated
Connector	40-pole

Common applications

Industrial Automation

PLC Systems

Machine Control

Process Control

Building Automation

Factory Automation

Compatible systems

SIMATIC S7-300 PLC System Compatible S7-300 CPUs Various S7-300 I/O modules

Also known as

Siemens S7-300 DI Module SM 321 Input Module 6ES7321 DI

Replaces / compatible with

This module is designed for the Siemens SIMATIC S7-300 PLC system and is compatible with other S7-300 series modules.

Technical note

Expert tip

Ensure the module is correctly seated in the S7-300 rack and that the 40-pole connector is securely fastened to prevent intermittent signal issues.

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Frequently asked questions

What voltage range does the Siemens 6ES7321-1FF10-0AA0 digital input module support?

The Siemens 6ES7321-1FF10-0AA0 SIMATIC S7-300 SM 321 digital input module supports 8 isolated inputs operating with AC voltages between 120V and 230V.