🧰 Product Overview

Product: Siemens 6ES7334‑0CE01‑0AA0
Name: SIMATIC S7-300 Analog Module SM 334 (Analog Input/Output)
Part Number: 6ES7 334-0CE01-0AA0
Type: SM 334 analog input/output module (mixed AI + AO) for S7-300 PLC systems
Function: Converts analog signals from field devices into digital values for the PLC and converts digital values from the PLC into analog outputs for actuators/sensors. Designed for use in S7-300 central racks or distributed I/O stations. 

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📊 Technical Specifications

⚡ Power & I/O

• Supply Voltage: 24 V DC (load voltage L+) 

• Current Consumption:
  • From 24 V DC (without load): max. ~110 mA 
  • From backplane bus (5 V): max. ~55 mA 

• Power Loss (typical): ~3 W 

🧠 Analog I/O Details

• Analog Inputs (AI): 4 channels 
  • Voltage measurement range: 0 … +10 V
  • Current measurement range: 0 … 20 mA
  • Input resistances: ~100 kΩ (voltage) / ~50 Ω (current) 
  • Max destruction limit: ~20 V (voltage) / ~40 mA (current) 

• Analog Outputs (AO): 2 channels
  • Voltage output up to ~10 V
  • Current output up to ~20 mA 

⚙️ Other Features

• Action: Non-isolated analog I/O (no electrical isolation between I/O channels and backplane bus). 

• Connector: 1×20-pole front connector for signals. 

• Installation: Supports remove/insert with active backplane bus (hot-swap during operation). 

• Cycle Time (all channels): up to ~5 ms for full scan. 

• Diagnostics: Basic LED status only; no advanced onboard diagnostics. 

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📐 Physical Specifications

According to manufacturer and vendor sources:

• Dimensions (W × H × D): approx. 40 mm × 125 mm × 117 mm

• Net Weight: approx. 0.285 kg (≈ 285 g) 

• Packaging Size: ~13.1 × 14.9 × 5.2 cm 

• Country of Origin: Germany 

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📌 Typical Uses

The SM 334 module is used in SIEMATIC S7-300 PLC racks and distributed I/O configurations (e.g., with ET 200M) to handle mixed analog signals such as:

• Reading sensor signals (0-10 V, 0-20 mA) from temperature/pressure/flow transmitters.

• Controlling actuators like analog valves and proportional drives.

• Small- to medium-scale process automation in industrial control panels.

Important: This variant is non-isolated, meaning the analog I/O is not electrically isolated from the backplane — suitable where electrical isolation is not required