New Original Siemens 6ES7234‑4HE32‑0XB0 SM1234 SIMATIC S7‑1200 Analog Input Output Module
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Siemens 6ES7234‑4HE32‑0XB0 SM1234 SIMATIC S7‑1200 Analog Input Output Module
Product Overview
The Siemens 6ES7234‑4HE32‑0XB0 SM1234 is a mixed analog input‑output signal expansion module for SIMATIC S7‑1200 PLC series. It integrates 4 analog input channels and 2 analog output channels within one compact unit. The module connects to S7‑1200 CPU through the internal backplane bus to expand analog signal acquisition and control capability. It supports multiple voltage and current signal types, adopts differential input design to suppress field interference. Configuration, parameter setting and hardware diagnosis are completed via TIA Portal STEP 7 engineering software. It is widely applied in temperature, pressure, flow and liquid‑level measurement and closed‑loop control for packaging machines, process auxiliary equipment and general automation systems. It is designed for cabinet‑only installation with industrial‑grade electromagnetic interference resistancecdn.pdf-s…..
Main Functions
- Analog signal acquisition: Collect voltage and current analog signals from transmitters and sensors via differential input channels.
- Analog signal output: Generate configurable analog voltage or current signals to drive proportional valves, variable‑speed drives and other analog actuators.
- A/D and D/A conversion: High‑precision analog‑to‑digital and digital‑to‑analog conversion for industrial process variable processing.
- Signal filtering: Support multi‑level smoothing filtering to reduce high‑frequency noise interference on analog input signals.
- Channel diagnosis: Detect wire‑break for current input channels, short‑circuit protection for output channels, supply voltage monitoring.
- Backplane bus communication: Real‑time data exchange with S7‑1200 CPU over expansion backplane bus without extra communication wiring.
- Flexible signal configuration: Software‑selectable signal ranges for each channel to adapt different field instruments.
- Status indication: LED indicators show module and channel working status for quick on‑site maintenance.
Technical Characteristics
| Item | Specification |
|---|---|
| Order Number | 6ES7234‑4HE32‑0XB0 |
| Product Model | SM 1234 |
| Compatible PLC Series | SIMATIC S7‑1200 |
| Analog Input | 4 channels, differential input |
| Input Signal Ranges | ±2.5 V, ±5 V, ±10 V, 0‑20 mA, 4‑20 mA |
| A‑D Conversion Resolution | 14‑bit for voltage; 13‑bit for current |
| Analog Output | 2 channels |
| Output Signal Ranges | ±10 V, 0‑20 mA, 4‑20 mA |
| D‑A Conversion Resolution | 14‑bit |
| Backplane Bus Current Consumption | 80 mA @ 5 V DC |
| External Module Supply | 24 V DC, typical 60 mA |
| Typical Power Dissipation | 2 W |
| Diagnostic Functions | Wire‑break detection for current input, short‑circuit protection for output |
| Max. Shielded Cable Length | 100 m |
| Operating Temperature | ‑20 ℃ ~ +60 ℃ horizontal mounting; ‑20 ℃ ~ +50 ℃ vertical mounting |
| Storage & Transport Temperature | ‑40 ℃ ~ +70 ℃ |
| Relative Humidity | 5%‑95%, non‑condensing |
| Protection Class | IP20 (installation inside electrical cabinet only) |
| Programming Tool | TIA Portal STEP 7 |
Mechanical Specifications
| Mechanical Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 100 mm |
| Depth | 75 mm |
| Net Weight | Approx. 220 g |
| Mounting Method | DIN‑rail mounting or screw mounting inside control cabinet |
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