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Siemens SIPLUS S7-1200 SM 1221 Digital Input Module: 8DI, 24V DC

Siemens SIPLUS S7-1200 digital input module, 8DI, 24V DC.

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ManufacturerSiemens

Part number6AG1221-1BF32-4XB0

Module Type Digital Input (DI)

Number of Inputs 8 DI

Voltage 24V DC (Sink/Source)

Temperature Range -20 to +60 °C

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12-month warranty

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Veteran-owned

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8 Digital Inputs 24V DC Operation Conformal Coating Wide Temperature Range (-20 to +60°C) SIPLUS Extended Reliability S7-1200 Compatible

Product description

The Siemens SIPLUS S7-1200 SM 1221 (6AG1221-1BF32-4XB0) is a digital input module designed for harsh environmental conditions. Based on the 6ES7221-1BF32-0XB0, this module features conformal coating for protection against humidity and corrosive substances, allowing operation in temperatures from -20°C to +60°C. It provides 8 digital inputs operating at 24V DC, supporting both sink and source configurations.

This module is ideal for use in S7-1200 automation systems deployed in demanding environments such as outdoor applications, chemical plants, food processing, or areas with significant temperature fluctuations, ensuring reliable signal acquisition.

Stanlo Automation, a veteran-owned company, offers the Siemens 6AG1221-1BF32-4XB0, providing access to specialized industrial components with dependable service.

Technical specifications

Module Type	Digital Input (DI)
Number of Inputs	8 DI
Voltage	24V DC (Sink/Source)
Temperature Range	-20 to +60 °C
Coating	Conformal Coating
Base Module	6ES7221-1BF32-0XB0

Common applications

Harsh Industrial Environments

Chemical Plants

Food & Beverage Processing

Outdoor Automation

Extreme Temperature Applications

S7-1200 PLC Systems

Compatible systems

Siemens S7-1200 PLC Series SIMATIC TIA Portal

Also known as

SIPLUS SM 1221 DI Siemens S7-1200 Input Module 8 Channel Digital Input

Replaces / compatible with

This SIPLUS version is based on the standard 6ES7221-1BF32-0XB0 module but is enhanced for harsh environments. It offers extended operating conditions.

Technical note

Expert tip

The conformal coating on the 6AG1221-1BF32-4XB0 requires specific handling during installation and maintenance to preserve its protective properties.

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Frequently asked questions

What makes the Siemens 6AG1221-1BF32-4XB0 SIPLUS module suitable for extreme environments?

The Siemens 6AG1221-1BF32-4XB0 SIPLUS module features conformal coating for protection against moisture and corrosive agents, and it is designed to operate reliably within a wide temperature range of -20°C to +60°C.