Home › Manufacturers › Siemens › SIMATIC S7-1200 & S7-200 › 6ES7221-1BF21-0XA0

Siemens

Siemens SIMATIC S7-200 EM 221 Digital Input Module - 8 DI

Name: Siemens 6ES7221-1BF21-0XA0
Brand: Siemens
SKU: 6ES7221-1BF21-0XA0
Availability: InStock

Siemens SIMATIC S7-200 EM 221 Digital Input Module with 8 DI, 24V DC.

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number6ES7221-1BF21-0XA0

Part Number 6ES7221-1BF21-0XA0

Manufacturer Siemens

Product Digital Input Module

Series SIMATIC S7-200 EM 221

Get a price for 6ES7221-1BF21-0XA0

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

8 Digital Inputs 24V DC Operation Sink/Source Input Capability For S7-22X CPU SIMATIC S7-200 Series

Product description

The Siemens SIMATIC S7-200 EM 221 (6ES7221-1BF21-0XA0) is a digital input expansion module specifically designed for S7-22X CPUs. It provides 8 digital inputs that operate on 24 V DC and support both sink and source input configurations.

This module is essential for collecting binary signals from field devices such as switches, buttons, and proximity sensors in automation applications. It is widely used in small to medium-sized automation projects across industries like manufacturing, building automation, and water treatment.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 6ES7221-1BF21-0XA0. Ensure reliable digital signal acquisition for your S7-200 PLC system by sourcing from us.

Technical specifications

Part Number	6ES7221-1BF21-0XA0
Manufacturer	Siemens
Product	Digital Input Module
Series	SIMATIC S7-200 EM 221
Inputs	8 Digital Inputs (DI)
Voltage	24 V DC
Input Type	Sink/Source

Common applications

Industrial Automation

Machine Control

Process Control

Building Automation

Water Treatment

Manufacturing

Compatible systems

Siemens S7-22X CPU (S7-224, S7-224XP, S7-226)

Also known as

SIMATIC S7-200 EM 221 Siemens Digital Input Card

Replaces / compatible with

This is an expansion module for Siemens SIMATIC S7-200 (S7-22X) series CPUs. It directly replaces previous versions of the EM 221 with the same specifications.

Technical note

Expert tip

Ensure the correct sink or source wiring configuration is used for the 6ES7221-1BF21-0XA0 module based on your PLC and field device setup.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What type of input configuration does the Siemens 6ES7221-1BF21-0XA0 support?

The Siemens 6ES7221-1BF21-0XA0 SIMATIC S7-200 digital input module supports both sink and source input configurations for its 8 DI channels, offering flexibility in wiring.