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Siemens 6ES7221-1BF30-0XB0 SIMATIC S7-1200 Digital Input Module

Siemens SIMATIC S7-1200 SM 1221 Digital Input Module, 8DI, 24V DC.

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ManufacturerSiemens

Part number6ES7221-1BF30-0XB0

Type Digital Input Module

Series SIMATIC S7-1200

Model SM 1221

Number of Inputs 8 DI

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8 digital inputs 24 V DC operation Supports sink and source wiring Part of S7-1200 system Reliable signal acquisition

Product description

The Siemens 6ES7221-1BF30-0XB0 is a SIMATIC S7-1200 Digital Input module, specifically the SM 1221. This module provides 8 digital inputs (DI) that operate at 24 V DC. It supports both sink and source configurations, offering flexibility in wiring and integration with various field devices.

This digital input module is a core component for S7-1200 PLC systems, used to acquire binary signals from sensors, switches, and pushbuttons. It is essential for applications in discrete manufacturing, process automation, building automation, and machine control where monitoring the status of on/off devices is required.

Stanlo Automation, a veteran-owned distributor of surplus industrial parts, offers the Siemens 6ES7221-1BF30-0XB0. Equip your S7-1200 system with reliable I/O components sourced from Stanlo.

Technical specifications

Type	Digital Input Module
Series	SIMATIC S7-1200
Model	SM 1221
Number of Inputs	8 DI
Voltage	24 V DC
Configuration	Sink/Source

Common applications

Discrete manufacturing

Process automation

Machine control

Building automation

Industrial control panels

Safety systems

Compatible systems

Siemens SIMATIC S7-1200 PLCs (e.g., CPU 1211C, 1212C, 1214C, 1215C, 1217C)

Also known as

SIMATIC S7-1200 DI Module SM 1221 Input Module Siemens 8DI Module

Replaces / compatible with

This digital input module is designed for Siemens SIMATIC S7-1200 controllers, expanding their input capabilities with 8 channels of 24V DC digital inputs.

Technical note

Expert tip

Ensure proper grounding and DC power supply are connected to the module for reliable operation and to prevent damage.

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Frequently asked questions

What type of digital input configuration does the Siemens 6ES7221-1BF30-0XB0 support?

The Siemens 6ES7221-1BF30-0XB0 SIMATIC S7-1200 digital input module supports both sink and source wiring configurations for its 8 digital inputs, operating at 24 V DC.