Siemens 6ES7221-1BH22-0XA0 Digital Input Module EM 221

6ES72211BH220XA0 – Legacy digital input expansion module designed for the SIMATIC S7-200 series. The EM 221 offers 16 digital inputs with 24V DC sinking/sourcing capability and is compatible exclusively with S7-22X CPUs.

Technical Specifications

• Model: 6ES7221-1BH22-0XA0 Siemens
• Series: SIMATIC S7-200
• Module Type: Digital Input Module (EM 221)
• Input Channels: 16 DI
• Input Voltage: 24V DC
• Input Type: Sinking/Sourcing
• Compatibility: Only with S7-22X CPUs
• Net Weight: 0.173 kg
• Dimensions (W×H×D): 8.6 × 10.0 × 7.0 cm
• Lifecycle Status: Product cancelled (01.10.2017)
• Country of Origin: China

Function & Application

Purpose: The EM 221 DI module was built to extend the input capacity of S7-200 compact controllers, allowing connection of up to 16 external digital sensors or switches.

It was often used in basic automation systems, small machinery, and cost-efficient distributed applications.

Typical Applications:

• Digital signal acquisition in compact S7-200 control setups
• Simple switch or sensor inputs in factory automation
• Low I/O count machine interfaces
• Cost-sensitive industrial or educational PLC training setups

Performance & Features

• 16 Digital Inputs : Expands I/O count with efficient form factor.
• Sinking/Sourcing Flexibility : Supports common 24V DC signal configurations.
• Dedicated for S7-22X CPUs : Ensures streamlined compatibility.
• Compact Design : Ideal for small cabinets and tight installations.
• Legacy Replacement : Maintains operational continuity for existing systems.

6ES7221-1BH22-0XA0 Compliance & Classification

• RoHS Compliance: Since 31.03.2008.
• WEEE Take-Back Obligation: No.
• REACH Substances:
  • Lead monoxide (CAS 1317-36-8) > 0.1%
• SCIP Number: e47944a7-f936-417e-af59-2bad7ae7ab3e
• Commodity Code: 85389091
• Catalog ID: ST9-E5
• Product Group: 4557
• Group Code: R131
• Product Class: A – Returnable stock item
• EAN: 4025515068655
• UPC: 662643188332

Key Features & Benefits:

✅ 16 Digital Inputs : Expand your signal handling without increasing panel size.

✅ S7-22X CPU Compatibility : Purpose-built for legacy S7-200 control setups.

✅ Compact Form Factor : Ideal for space-restricted environments.

✅ Legacy System Support : Maintain uptime in long-term automation solutions.

✅ Spare Part Availability : Suitable for MRO and service contracts.

📦 Order While Stocks Last – Spare Part Availability

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Looking to upgrade or find a modern I/O alternative for your S7-200 setup?

Contact our Siemens legacy support team today.

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