6ES7234-4HE32-0XB0 SM 1234 4AI/2AO Analog I/O Module ±10V/0-20mA | Siemens

The Original New Siemens 6ES7234-4HE32-0XB0 SIMATIC S7-1200 SM 1234 Analog I/O Module is a combined analog input/output signal module for flexible I/O expansion in S7-1200 automation systems. It provides 4 analog inputs and 2 analog outputs, each independently configurable for voltage or current signals. With 13-bit resolution for inputs (12-bit + sign) and 14-bit resolution for outputs, this module delivers precise signal acquisition and control for machine automation, process control, and OEM applications. Fully compatible with all S7-1200 CPUs (except CPU 1211C).

Core Engineering Highlights:
4 analog inputs (voltage/current configurable) | 2 analog outputs (voltage/current configurable) | ±10V, ±5V, ±2.5V voltage ranges | 0-20mA, 4-20mA current ranges | 13-bit input resolution (12-bit + sign) | 14-bit output resolution | 625 µs cycle time (all channels) | 24V DC rated supply | 60 mA typical current consumption | 80 mA backplane bus current | 2 W typical power loss | 9 MΩ input impedance (voltage) | 280 Ω input resistance (current) | ±0.1% basic error limit (inputs) | ±0.3% basic error limit (outputs)

Key Features:

• Original New Siemens 6ES7234-4HE32-0XB0 module

• 4 differential analog input channels (voltage/current configurable)

• 2 analog output channels (voltage/current configurable)

• Voltage input ranges: ±10V, ±5V, ±2.5V

• Current input ranges: 0-20mA, 4-20mA

• Voltage output range: ±10V

• Current output ranges: 0-20mA, 4-20mA

• 13-bit input resolution (12-bit + sign) with overrange capability

• 14-bit output resolution

• 625 µs maximum cycle time for all channels

• 24V DC rated supply voltage (20.4–28.8V range)

• 9 MΩ input impedance for voltage inputs

• 280 Ω input resistance for current inputs

• 35V maximum permissible input voltage (destruction limit)

• 40mA maximum permissible input current (destruction limit)

• 1,000 Ω minimum load impedance for voltage outputs

• 600 Ω maximum load impedance for current outputs

• 0.1% basic error limit for inputs at 25°C

• 0.3% basic error limit for outputs at 25°C

• Configurable smoothing for measured values (None/Low/Medium/High)

• 40 dB interference voltage suppression at 50/60 Hz

• 100 m shielded cable length (shielded, twisted pair)

• LED status indication for module and channel diagnostics

• IP20 protection for control cabinet installation

• Wide operating temperature: –20°C to +60°C

Applications:

• Combined analog signal acquisition and control in S7-1200 systems

• Process variable monitoring (pressure, flow, level, temperature) with actuator control

• 4-20mA current loop signal acquisition and generation

• Machine automation and motion control systems

• Data acquisition and control applications

• OEM equipment requiring 4 analog inputs and 2 analog outputs in a single module

• Applications where analog I/O resolution and accuracy are critical

Technical Specifications:

Power Supply:

Analog Inputs:

Analog Outputs:

Physical & Environmental:

System Compatibility:

• Siemens SIMATIC S7-1200 controllers (all CPUs except CPU 1211C)

• S7-1200 signal modules (SM) for I/O expansion

• TIA Portal engineering framework (STEP 7 Basic / Professional)

• 24V DC control systems

Typical System Architecture:
S7-1200 CPU (e.g., CPU 1214C DC/DC/DC)
↓
6ES7234-4HE32-0XB0 SM 1234 Analog I/O Module (4AI/2AO, 45 mm width)
│
├── Analog Inputs (4 channels) → Field Transmitters (Pressure, Flow, Level, Temperature)
├── Analog Outputs (2 channels) → Actuators (Valves, Drives, Positioners)
│
↓
Additional S7-1200 Signal Modules (SM) / Signal Boards (SB) / Communication Modules (CM)
↓
TIA Portal Engineering (STEP 7 Basic / Professional)

Related Products:

• 6ES7231-4HD32-0XB0 – SM 1231 4-channel analog input module (4AI)

• 6ES7231-4HF32-0XB0 – SM 1231 8-channel analog input module (8AI)

• 6ES7232-4HD32-0XB0 – SM 1232 4-channel analog output module (4AO)

• 6ES7234-4HE32-0XB0 – SM 1234 4AI/2AO combination module (current model)

• 6ES7214-1AG40-0XB0 – CPU 1214C DC/DC/DC (14DI/10DO/2AI)

• 6ES7274-1XF30-0XA0 – SIMATIC Memory Card for S7-1200

• 6ES7290-6AA30-0XA0 – Simulation module for S7-1200 (optional)

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Siemens, SIMATIC, S7-1200, and TIA Portal are trademarks of Siemens AG.