Product Overview

The Siemens 6ES7421-1BL01-0AA0 is a digital output module for the SIMATIC S7-400 series. The SM 422 module features 32 digital outputs operating at 24 V DC, designed for reliable control of actuators, indicator lamps, and other field devices in industrial automation systems.

Key Features and Benefits

This module delivers stable output performance with a maximum switching capacity of 5 W per channel on lamp loads. It limits inductive shutdown voltage to -27 V, protecting both the module and connected devices. The compact 21 x 2.5 x 29 cm design and lightweight 0.6 kg body simplify cabinet installation, while its power loss of 4 W ensures energy-efficient operation.

Technical Specifications

• Article Number: 6ES7421-1BL01-0AA0

• Manufacturer: Siemens

• Product Type: SIMATIC S7-400 Digital Output Module SM 422

• Rated Voltage (DC): 24 V

• Number of Digital Outputs: 32

• Input Current from Load Voltage L+ (Max., No Load): 30 mA

• Power Loss, Typ.: 4 W

• Limitation of Inductive Shutdown Voltage: -27 V

• Switching Capacity per Output (Lamp Load, Max.): 5 W

• Diagnostics Function: No

• Dimensions (L x W x H): 21 x 2.5 x 29 cm

• Weight: 0.6 kg

• Shipping Weight: 2 kg

Applications

The Siemens 6ES7421-1BL01-0AA0 is suitable for machine automation, process control, and industrial distributed I/O systems. Its 32 digital outputs provide precise control for actuators, signal lamps, and other field devices in complex automation setups.