Siemens
Siemens SIMATIC S7-200 EM 221 Digital Input Module
Siemens SIMATIC S7-200 Digital Input Module (16 DI).
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12-Mo Warranty
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12-month warranty
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Same-day dispatch
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Worldwide delivery
US, EU, Asia, Middle East
Veteran-owned
CAGE: 9NK75
16 digital inputs
24 V DC operation
Sinking/sourcing configurable
Expands S7-200 I/O
Compact design
Product description
The Siemens 6ES7221-1BH22-0XA0 is a Digital Input Expansion Module (EM 221) for the SIMATIC S7-200 series PLC. This module provides 16 digital inputs that operate at 24 V DC, allowing the S7-200 CPU to monitor external signals.
This module is ideal for expanding the I/O capabilities of SIMATIC S7-200 systems in various industrial applications, including machine automation, process control, and building management. It supports both sinking and sourcing configurations for flexible wiring.
Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 6ES7221-1BH22-0XA0. Get reliable components for your S7-200 system from Stanlo.
Technical specifications
| Part Number | 6ES7221-1BH22-0XA0 |
| Manufacturer | Siemens |
| Type | Digital Input Module |
| Series | SIMATIC S7-200 |
| Expansion Module | EM 221 |
| Number of Inputs | 16 DI |
| Voltage | 24 V DC |
| Configuration | Sinking/Sourcing |
Common applications
Machine automation
Process control
Building automation
Data acquisition
Industrial monitoring
Compatible systems
Compatible with Siemens SIMATIC S7-22X CPUs.
Also known as
Siemens S7-200 EM 221
6ES72211BH220XA0
Replaces / compatible with
This module expands the digital input capacity of any compatible SIMATIC S7-200 CPU. It is a direct replacement for other EM 221 modules with the same specifications.
Technical note
Expert tip
Ensure correct wiring for sinking or sourcing configuration based on your control voltage and PLC requirements.What happens next?
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Frequently asked questions
How many digital inputs does the Siemens 6ES7221-1BH22-0XA0 offer?
The Siemens 6ES7221-1BH22-0XA0 module provides 16 digital inputs (16 DI). These inputs operate at 24 V DC and can be configured as sinking or sourcing.