SIEMENS SIMATIC 6ES5185-3UA23

SIEMENS SIMATIC 6ES5185-3UA23 – Legacy Programmable Logic Controller (PLC) Module

Industrial Automation Component for SIMATIC S5 Systems

The 6ES5185-3UA23 is a discontinued module from Siemens’ SIMATIC S5 series, a pioneering PLC (Programmable Logic Controller) system widely used in 1980s–1990s industrial automation. This module served as a critical component in:
✔ Machine control systems
✔ Manufacturing process automation
✔ Assembly line sequencing
✔ Legacy industrial equipment

Key Specifications & Features

🔧 Module Type: Digital/Analog I/O Module
🔌 Compatibility: Designed for SIMATIC S5-115U/135U/155U PLC racks
💾 Function: Signal processing for sensors & actuators
🛡️ Robust Design:

• Operating temperature: 0°C to 60°C

• Vibration/EMI resistant

• DIN rail mountable

Technical Details

• Manufacturer Part No.: 6ES5185-3UA23

• Series: SIMATIC S5 (predecessor to modern S7 series)

• Status: Discontinued (replaced by S7-300/400 equivalents)

• Voltage Range: 24V DC industrial standard

Typical Applications

🏭 Factory Automation:

• Conveyor belt motor control

• Pneumatic valve actuation

⚡ Process Industries:

• Batch processing logic

• Temperature/pressure monitoring

🔧 Machinery:

• Interfacing with limit switches

• Relay/solenoid control

Modern Context & Replacement Options

⚠ Obsolescence Notice:

• No longer manufactured by Siemens

• Limited availability (refurbished/used units only)

• Requires STEP 5 programming (legacy software)

🔄 Recommended Migration Path:

• SIMATIC S7-300/400 (modern equivalent)

• ET 200SP (distributed I/O system)

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