The SM 1232 (Part No. 6ES7 232-4HD32-0XB0) is a compact, high-precision analog output signal module designed to integrate with SIMATIC S7-1200 PLC systems. It provides four versatile analog output channels capable of delivering both voltage and current signals, supported by advanced diagnostics and seamless modular compatibility.
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Technical Specifications

Analog Outputs

Channel Count: 4 analog outputs (either voltage or current)
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Voltage Ranges: ±10 V (14-bit resolution)
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Current Ranges: 0–20 mA or 4–20 mA (13-bit resolution)
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Resolution: Voltage: 14 bits; Current: 13 bits
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Output Load:

Voltage mode: ≥ 1 kΩ

Current mode: ≤ 600 Ω
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Settling Time (95% value):

Voltage: 300 µs with resistive load; 750 µs with 1 µF capacitance

Current: 600 µs into 1 mH; 2 ms into 10 mH inductive load
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Behavior from RUN to STOP: Outputs maintain last value or switch to substitute value (default = 0)
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Accuracy & Temperature Performance

Accuracy at 25 °C: ±0.3 % full-scale

At –20 to +60 °C: up to ±0.6 % full-scale
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Diagnostic Features

Supports alarm signaling and diagnostics for:

Overflow/underflow conditions

Short-circuits (voltage mode)

Wire-break detection (current mode)

Low 24 V DC supply voltage
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Power & Mechanical Details

Power Dissipation: Approximately 2.0 W
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Current Consumption:

SM Bus (5 V): ~80 mA

24 V DC supply (no load): ~45 mA
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Dimensions: 45 × 100 × 75 mm (W × H × D)
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Weight: ~180 g
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Wiring & Cabling

Supports twisted, shielded cable runs up to 100 meters
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Environmental Ratings

Operating Temperature:

Horizontal: –20 °C to +60 °C

Vertical: –20 °C to +50 °C
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Certification & Protection:

IP20 enclosure, standard DIN-rail module protection, designed to withstand 0.3 m free fall in packaging
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Approvals: CE, UL/cULus, CSA, FM, RCM, KC, Marine
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Engineering Highlights

Versatile Output Modes: Voltage and current output formats cover most actuator and control input needs.

Superior Resolution: 14-bit voltage and 13-bit current resolution ensures high-precision control.

Fast and Stable Response: Sub-millisecond settling times allow tight analog feedback loops and real-time regulation.

Field Diagnostics Built-In: Detects and flags output issues quickly, helping reduce downtime.

Compact and Efficient Design: Slim profile and moderate power use fit neatly into modern control panels without compromising capacity.

Robust and Industrial-Ready: Certification suite and temperature performance make it reliable in diverse environments.

Ideal Applications

Proportional Valve Control: Precise analog voltage control enables smooth modulation of pneumatic or hydraulic systems.

Process Automation: Current outputs drive analog actuators like control valves or variable-frequency drives.

Feedback Loops & Analogue Control: Tight control of temperature, pressure, or speed systems thanks to fast, accurate output.

Hybrid Systems Integration: Configurable outputs support compatibility with legacy and modern automation components.

Summary Table
Feature Specification
Outputs 4 × analog (Voltage ±10 V or Current 0/4–20 mA)
Resolution Voltage: 14-bit; Current: 13-bit
Accuracy ±0.3 % (25 °C) / ±0.6 % (–20 to +60 °C)
Settling Time Voltage: 300–750 µs; Current: 600 µs–2 ms
Diagnostics Overflow, short-circuit, broken-wire, low supply
Power Consumption ~45 mA (24 V), 80 mA (5 V SM Bus), ~2 W dissipated
Dimensions & Weight 45 × 100 × 75 mm; ~180 g
Environmental –20 °C to +60 °C (horizontal); certifications included
Cable Length Up to 100 m (shielded twisted pair)