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16-Channel Relay Output for SIMATIC S5 Systems
The 6ES5451-7LA12 digital output module provides 16 relay outputs for the SIMATIC S5 automation platform. This module offers galvanically isolated outputs, making it suitable for switching AC and DC loads. Each channel handles up to 2 A continuous current for driving contactors and solenoid valves . Consequently, this module serves machine tools, packaging lines, and material handling systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Product Line | SIMATIC S5 |
| Model | 6ES5451-7LA12 |
| Module Type | Digital Output Module |
| Number of Outputs | 16 (relay) |
| Contact Type | Normally open (make contact) |
| Switching Voltage | 250 V AC / 30 V DC |
| Switching Current | Max. 2 A (resistive) |
| Rated Load Voltage | 24 V DC |
| Isolation | Galvanic (between channels and backplane) |
| Power Dissipation | 4.5 W |
| Current Consumption (5V) | 120 mA |
| Weight | 0.72 kg |
| Dimensions (W x H x D) | 25 x 287 x 245 mm |
| Operating Temperature | 0°C to 60°C |
| Certifications | CE, UL, CSA |
Output Characteristics and Protection
The 6ES5451-7LA12 features 16 relay outputs with a rated current of 2 A per channel . Each output provides galvanic isolation between the field side and the backplane bus . The module includes LED indicators for each output channel . These indicators display the relay status at a glance . Furthermore, the relays support mixed load voltages within the same module.
Physical Characteristics and Installation
Weighing 0.72 kg, this module fits standard S5 rack slots . Its dimensions are 25 mm in width, 287 mm in height, and 245 mm in depth . The module uses screw terminals for secure field wiring connections . The front panel provides clear labeling for straightforward channel identification.
System Compatibility
The 6ES5451-7LA12 works with SIMATIC S5-115U, S5-135U, and S5-155U PLC systems . It communicates with the CPU through the S5 backplane bus . Users can connect this module to solenoid valves, motor contactors, and indicator lamps . The relay outputs allow mixing of AC and DC loads on different channels.