Product Overview

The SIMATIC S7-1200 Fail-Safe Digital Output Module SM 1226 provides safety-certified digital outputs for critical safety applications. Featuring 4 fail-safe outputs with PROFIsafe communication, this module enables implementation of safety functions up to SIL3/PL E compliance for machine safety and process protection.

Key Features

• 4 Fail-Safe Outputs: Safety-certified digital outputs for critical applications
• High Current Capacity: 2A per output for driving safety devices and actuators
• SIL3/PL E Certified: Highest safety integrity level for critical applications
• PROFIsafe Communication: Integrated safety communication protocol
• Wider Housing: 70mm width to accommodate safety circuitry
• Category 4/PL E: Compliant with ISO 13849-1 safety standards

Technical Specifications

• Outputs: 4 fail-safe digital outputs, 24V DC
• Output Current: 2A per channel for high-power safety devices
• Safety Rating: SIL3 (IEC 61508), PL E/Category 4 (ISO 13849-1)
• Communication: PROFIsafe protocol for safety data transmission
• Dimensions: 70 × 100 × 75 mm (W × H × D) | Weight: 0.265 kg
• Supply Voltage: 20.4-28.8V DC from CPU backplane
• Protection: IP20 | Connection: Screw/spring clamp terminals

Safety Standards & Compliance

Safety Integrity Levels:

• SIL3: Highest level per IEC 61508 functional safety standard
• PL E: Performance Level E per ISO 13849-1 machinery safety
• Category 4: Fault tolerance with single fault safety per ISO 13849-1

PROFIsafe Features:

• Integrated safety communication with fail-safe CPUs
• Automatic safety monitoring and diagnostics
• Black channel principle for safety data transmission
• Configurable safety parameters and response times

Applications & Integration

Primary Safety Applications:

• Emergency stop systems and safety shutdown functions
• Safety door monitoring and interlocking systems
• Light curtain and safety sensor integration
• Process safety and machinery protection systems
• Fire and gas detection safety responses

System Requirements:

• Requires S7-1200F fail-safe CPU for safety functionality
• PROFIsafe communication for safety data exchange
• TIA Portal Safety configuration and programming
• Safety-certified field devices and actuators

Installation & Configuration

• Safety Wiring: Dedicated safety circuits with proper separation
• TIA Portal Safety: Configuration through safety-certified programming tools
• PROFIsafe Setup: Integrated safety communication configuration
• Diagnostic Features: Comprehensive safety monitoring and fault detection
• Hot-Swappable: Service during operation with proper safety procedures

Safety Features

Built-in Safety Functions:

• Automatic output monitoring and fault detection
• Wire-break detection for safety circuits
• Cross-fault monitoring between channels
• Safety-related substitute values on fault conditions
• Integrated test pulse generation for external monitoring

Diagnostic Capabilities:

• Channel-specific fault indication and status
• Safety communication monitoring
• Supply voltage supervision
• Output load monitoring and verification

Quality & Compliance

• Status: Active Product (PM300) | Origin: China
• EAN: 4025515082873 | UPC: 804766054648
• RoHS Compliant: Since 27.11.2014 | WEEE: Take-back obligation applies
• REACH: Contains lead, lead oxide, silicic acid lead salt, and BPA above 0.1% w/w (safe when used as intended)

Package Contents

• 1 × SM 1226 Fail-Safe Digital Output Module (4 F-DQ), technical documentation, safety manual, DIN rail hardware

Download existing graphical data for this product:

• Technical Datasheet
• Product Information Page
• SM 1226 Fail-Safe Product Family
• S7-1200 Functional Safety Manual
• Product Support Portal