Siemens Simatic S7-1200 Digital Input SM 1226 6ES7226-6BA32-0XB0

The Siemens Simatic S7-1200 Digital Input SM 1226 is a failsafe digital input module designed for the SIMATIC S7-1200 PLC system. It provides 16 channels for 24V DC digital inputs with configurable input delays and comprehensive diagnostics, ensuring reliable and safe operation in industrial automation applications.

Advantages

This module offers failsafe functionality with SIL 3 and PL e certification, making it suitable for safety-critical applications. The configurable input delay (0.05 ms to 20 ms) allows adaptation to various signal types, while built-in diagnostics for wire break, short circuit, and supply voltage monitoring enhance system reliability. The screw-type terminals provide secure and easy wiring.

Suitable for

• Industrial automation and control systems requiring safety functions
• Machine safety applications up to SIL 3 / PL e
• Integration with SIMATIC S7-1200 PLCs
• Applications needing 16 digital inputs with 24V DC

Key specifications

• Module Type: Digital Input Module with Failsafe
• Number of Digital Inputs: 16 channels
• Input Voltage: 24V DC
• Input Current (per channel): Typ. 2.5 mA
• Input Delay: Configurable 0.05 ms to 20 ms
• Isolation: Between channels and backplane bus
• Connection Type: Screw-type terminals
• Power Consumption (from backplane bus): Max. 2.5 W
• Operating Temperature: -20 °C to +60 °C (horizontal mounting)
• Protection Class: IP20
• Safety Integrated Level (SIL): SIL 3 (IEC 61508)
• Performance Level (PL): PL e (ISO 13849-1)
• Compatible PLC Series: SIMATIC S7-1200
• Mounting Type: DIN rail
• Input Type: Sink/Source (Type 1/2 according to IEC 61131-2)
• Supply Voltage for Inputs: 24V DC (external source)

Recommendations

For optimal performance, use with a Siemens SIMATIC S7-1200 CPU and ensure proper external 24V DC supply for inputs. Refer to the manual for detailed wiring and configuration instructions.