Siemens 6ES7234-4HE32-0XB0 SIMATIC S7-1200 Analog I/O SM 1234 4AI/2AO

The Siemens 6ES7234-4HE32-0XB0 is a SIMATIC S7-1200 analog I/O signal module (SM 1234) offering 4 analog inputs and 2 analog outputs. Inputs support ±10V, ±5V, ±2.5V voltage ranges and 0-20mA, 4-20mA current ranges at 13-bit resolution; outputs provide ±10V voltage at 14-bit resolution and 0-20mA/4-20mA current at 13-bit resolution. The module runs from a 24V DC supply and mounts directly on the S7-1200 backplane.

Technical specifications:

• MLFB: 6ES7234-4HE32-0XB0
• Manufacturer: Siemens
• Product line: SIMATIC S7-1200
• Product type: SM 1234, AI 4x13 bit / AQ 2x14 bit
• Supply voltage: 24V DC
• Analog inputs: 4 differential, voltage (±10V, ±5V, ±2.5V) or current (0-20mA, 4-20mA), 13-bit resolution
• Input resistance: 9 MOhm (voltage inputs), 280 Ω (current inputs)
• Analog outputs: 2, voltage ±10V (14-bit) or current 0-20mA/4-20mA (13-bit)
• Load impedance: min 1000 Ω (voltage outputs), max 600 Ω (current outputs)
• Cycle time (all channels): max 625 µs
• Cable length: max 100m, shielded twisted pair
• Basic error at 25°C: ±0.1% of input range; ±0.3% of output range
• IP rating: IP20
• Operating temperature: -20°C to +60°C (horizontal), -20°C to +50°C (vertical)
• Dimensions: 45 x 100 x 75 mm (W x H x D)
• Weight: 220g
• Certifications: CE, UL, cULus, CSA, FM, RCM, KC, Marine

Features and benefits:

• Differential measurement principle reduces common-mode interference on analog inputs
• Parameterizable smoothing (None, Low, Medium, High) and integration time per channel
• Diagnostic alarms for wire break, short-circuit, and supply voltage monitoring
• LED status indicators for input status, output status, and maintenance events
• 40dB interference voltage suppression at 50/60Hz interference frequency

Applications:

• Analog sensor acquisition (pressure, temperature, flow transducers) in S7-1200 control systems
• Closed-loop process control with proportional valve or variable speed drive setpoint outputs
• Building automation using 0-10V or 4-20mA field devices
• Machine monitoring with mixed voltage and current signal transducers

Approved to CE, UL, cULus, CSA, FM, RCM, KC, and Marine standards. Part of the Siemens SIMATIC S7-1200 range.

Also known as: Siemens 6ES7234-4HE32-0XB0, SIMATIC SM 1234 analog module, S7-1200 4AI 2AO signal module.