Siemens 6ES7234-4HE32-0XB0 SIMATIC S7-1200 SM 1234 Analog I/O Module 4AI/2AO 24V DC

Mixed analog I/O module for S7-1200 systems, combining 4 analog input channels with 2 analog output channels in a single compact unit for precision measurement and control in industrial automation.

The Siemens 6ES7234-4HE32-0XB0 is an SM 1234 analog signal module for the SIMATIC S7-1200 PLC family. It integrates 4 analog inputs (configurable for ±10V, ±5V, ±2.5V, 0-20 mA, or 4-20 mA) and 2 analog outputs (configurable for ±10V, 0-20 mA, or 4-20 mA). This mixed-signal design allows connection of various sensors and actuators without separate modules.

Applications

• Process control and monitoring (pressure, flow, level, temperature)

• Factory automation signal acquisition and actuator control

• PID control loops with both sensor feedback and output regulation

• OEM machinery requiring compact analog I/O integration

• Building automation (HVAC damper control, temperature monitoring)

Key Features

• 4 analog input channels for sensors and transmitters

• 2 analog output channels for actuators and drives

• Configurable voltage (±10V, ±5V, ±2.5V) or current (0-20 mA, 4-20 mA) per channel

• 14‑bit resolution for voltage signals, 13‑bit for current signals

• 625 µs cycle time (all channels) for fast response

• Diagnostic functions: supply voltage monitoring, wire‑break detection, short‑circuit protection

• 24V DC operation, mounts on S7-1200 DIN rail

Technical Specifications

• Inputs: 4 analog (voltage or current, differential)

• Outputs: 2 analog (voltage or current)

• Input ranges: ±10V, ±5V, ±2.5V; 0-20 mA, 4-20 mA

• Output ranges: ±10V; 0-20 mA, 4-20 mA

• Input resolution: 13‑bit (voltage also supports 14‑bit)

• Output resolution: 14‑bit (voltage), 13‑bit (current)

• Input impedance: ≥9 MΩ (voltage), 280 Ω (current)

• Output load: ≥1 kΩ (voltage), ≤600 Ω (current)

• Cycle time: max. 625 µs for all channels

• Backplane current: 80 mA @ 5V DC, 60 mA @ 24V DC

• Power loss: 2 W max

• Dimensions (W × H × D): 45 × 100 × 75 mm

• Weight: approx. 0.19 kg

• Protection rating: IP20

• Operating temperature: -20°C to 60°C

• Certifications: CE, RoHS

• Country of Origin: China

System Integration

• PLC Controllers: SIMATIC S7-1200 (CPU 1211C, 1212C, 1214C, 1215C, 1217C)

• Mounting: Snaps onto DIN rail next to CPU on the right side

• Configuration Software: TIA Portal (STEP 7 Basic or Professional)

• Wiring: Front connector (screw‑type or spring‑type, sold separately)

Related Products

• CPU Controller: Siemens 6ES7215‑1AG40‑0XB0 S7‑1200 CPU 1215C – system core

• Digital I/O Module: Siemens 6ES7221‑1BH32‑0XB0 SM 1221 – digital input expansion

• Analog Output Module: Siemens 6ES7232‑4HD32‑0XB0 SM 1232 – additional analog outputs

• Front Connector: Siemens 6ES7292‑1AX30‑0XA0 – 20‑pin screw‑type connector

PLC ERA is an independent industrial automation distributor. Products are sourced from established supply channels and inspected before shipment. International shipping available.