Product Overview

The 6ES5458-7LA11 is a high-performance relay output module from Siemens, designed as a critical component of the SIMATIC S5 series programmable logic controller (PLC) systems. Manufactured by Siemens, a global leader in industrial automation, the 6ES5458-7LA11 provides 16 floating, isolated relay output channels capable of switching both AC and DC loads. This module is specifically engineered to interface with the S5-115U, S5-135U, and S5-155U controller platforms, converting PLC logic signals into robust field-level actuation commands for a wide variety of industrial equipment .

As a core element in any industrial control architecture requiring mixed-voltage load switching, the 6ES5458-7LA11 ensures that the controller’s decisions are accurately translated into physical actions. The module’s 16-channel capacity allows for the simultaneous control of numerous field devices, such as intermediate relays, solenoid valves, pilot lights, and contactors. The 6ES5458-7LA11 employs physical relay contact technology, providing complete galvanic isolation between the PLC’s internal logic and the external load circuits. This floating contact design is essential for protecting the controller from voltage spikes and electrical noise, ensuring stable operation even in harsh industrial environments .

By integrating the 6ES5458-7LA11 into your automation system, you can achieve highly flexible and reliable digital output control across diverse voltage levels, which is fundamental for effective process automation and equipment management. Its modular design allows for seamless integration into the S5 rack, simplifying system configuration and expansion. The 6ES5458-7LA11 continues to be a vital and widely used component in legacy Siemens systems, valued for its exceptional reliability, robust performance, and versatility in driving both AC and DC loads in mission-critical applications across various industries .

 

Technical Specifications

Parameter Name	Parameter Value
Product Model	6ES5458-7LA11
Manufacturer	Siemens
Product Type	Digital Output Module (Relay Output)
Series	SIMATIC S5
Compatibility	S5-115U, S5-135U, S5-155U
Output Channels	16 (floating relay contacts)
Max AC Switching Voltage	250V AC
Max AC Switching Current	1.5A
Max DC Switching Voltage	30V DC
Max DC Switching Current	1A
Switching Capacity (DC 11)	10W at 0.5A
Contact Lifetime	10⁵ to 10⁶ operating cycles
Supply Voltage (L+) for Relay	24V DC (20-30V DC range)
Current Consumption from L+	Approx. 240mA
Operating Temperature	-25°C to +70°C
Protection Class	IP20
Weight	Approx. 0.8kg

 

Main Features and Advantages

The 6ES5458-7LA11 offers a compelling combination of high channel density and versatile load switching capability. Its most prominent feature is the provision of 16 floating relay output channels in a single module . This high-density design allows for significant space savings within the control cabinet, making it an exceptionally efficient solution for systems requiring numerous discrete output points. The 6ES5458-7LA11 reduces the overall footprint and simplifies rack configuration compared to lower-density alternatives, representing a cost-effective approach to system design.

Superior versatility and isolation are key advantages of the 6ES5458-7LA11. Unlike transistor output modules limited to DC loads, this module’s physical relay contacts allow it to switch both AC and DC loads with different voltage and current ratings . This flexibility makes the 6ES5458-7LA11 ideal for driving a wide range of industrial equipment, from small DC solenoids to AC-powered indicator lamps and contactor coils. Furthermore, the floating contact design provides complete galvanic isolation between the PLC and field circuits, effectively rejecting common-mode voltages and protecting against electromagnetic interference (EMI). This ensures that the 6ES5458-7LA11 delivers reliable output signals even in electrically noisy environments .

The 6ES5458-7LA11 also excels in ease of integration and diagnostics. Its straightforward wiring with screw terminals and modular construction allow for quick installation and maintenance . Each output channel features an LED status indicator, providing real-time visual feedback on the state of each output for rapid fault detection and troubleshooting . The module is designed with reliability in mind, supporting switching frequencies up to 100Hz under resistive loads . For engineers and maintenance personnel, the 6ES5458-7LA11 represents a durable, trustworthy, and highly adaptable solution for managing critical digital outputs within the SIMATIC S5 ecosystem, particularly where mixed load types are encountered.