Siemens Digital output SM 1223, 8DI/8DO, relay 2A

Product Overview

The SIMATIC S7-1200 Digital I/O Module SM 1223 provides balanced digital signal processing with 8 inputs and 8 relay outputs. Featuring 24V DC sink/source inputs and 2A relay switching capacity, this module delivers reliable I/O expansion for industrial automation applications requiring moderate-density digital interfacing with high-power output control.

Key Features

• 8 Digital Inputs + 8 Relay Outputs: Optimized I/O balance with 24V DC sink/source inputs and 2A relay switching
• Sink/Source Compatibility: Universal input configuration supporting both NPN and PNP sensors
• High-Power Relay Outputs: 2A switching capacity per relay for controlling motors, contactors, and medium loads
• Galvanic Isolation: Complete electrical isolation between channels for enhanced system safety
• Compact Balanced Design: 45mm width with optimal input/output ratio for efficient space utilization
• Comprehensive Diagnostics: Channel-specific status indication and fault detection for maintenance

Technical Specifications

• I/O Configuration: 8 DI (24V DC) + 8 DO (Relay 2A)
• Dimensions: 45 × 100 × 75 mm (W × H × D) | Weight: 0.218 kg
• Input Voltage: 24V DC sink/source (20.4-28.8V range) | Input Current: 4mA per channel
• Output Rating: 2A per relay contact (DC 5-30V, AC 5-250V) | Power Loss: 5.5W typical
• Operating Temperature: -25°C to +60°C | Protection: IP20
• Connection: Screw/spring clamp terminals | Response Time: 0.2ms signal delay

Applications & Integration

Primary Applications:

• Manufacturing automation with balanced I/O requirements
• Machine control systems requiring relay-switched outputs
• Process control with medium-power actuators and indicators

System Compatibility:

• All S7-1200 CPU models except CPU 1211C (requires signal modules)
• TIA Portal configuration with STEP 7 Basic programming environment
• Up to 8 modules per CPU with hot-swappable installation
• Standard 35mm DIN rail mounting with integrated connections

Quality & Compliance

• Status: Active Product (PM300) | Origin: Germany
• EAN: 6940408101999 | UPC: 887621175320
• RoHS Compliant: Since 15.03.2013 | WEEE: Take-back obligation applies
• REACH: Contains lead, lead oxide, and BPA above 0.1% w/w (safe when used as intended)

Package Contents

• 1 × SM 1223 Module (8 DI/8 DO Relay), technical documentation, DIN rail hardware

Download existing graphical data for this product:

• Technical Datasheet
• Product Information Page
• SM 1223 Product Family
• TIA Portal Documentation
• Technical Specifications