Product Overview

The SIEMENS 6ES5440-8MA22 is a high-performance non-floating digital output module from the SIMATIC S5 family, specifically designed to interface the programmable logic controller (PLC) with field actuators in industrial automation environments. This module, known as the SIMATIC S5 440 digital output module, provides 4 independent output channels with a nominal 24V DC voltage rating and a substantial 2A current capacity per channel, making it ideal for driving high-power loads such as solenoid valves, contactors, indicator lamps, and interposing relays. The SIEMENS 6ES5440-8MA22 is primarily designed for use with S5-90U, S5-95U, and S5-100U controllers, as well as ET 100U and ET 200U distributed I/O systems, serving as a critical component for legacy automation installations that continue to operate across numerous industrial facilities worldwide .

The high-current output capability of the SIEMENS 6ES5440-8MA22 distinguishes it from lower-current alternatives such as the 6ES5440-8MA12 (0.5A per channel), enabling direct control of power-hungry field devices without requiring intermediate relay amplification . This module features a non-floating design where all outputs share a common ground (M) reference, simplifying wiring and reducing installation costs in applications where galvanic isolation between outputs is not required. The SIEMENS 6ES5440-8MA22 incorporates comprehensive protection features including short-circuit protection with automatic restart, ensuring reliable operation and safeguarding connected loads against fault conditions . As the SIMATIC S5 product line has been discontinued, the SIEMENS 6ES5440-8MA22 serves as an essential spare part for extending the operational life of existing S5-based systems, offering a cost-effective alternative to complete system migration while providing dependable control for legacy AC and DC load circuits.

Technical Specifications