Product Overview
Applications
Data acquisition in 1- and 3-phase TN and TT supply systems up to 480 V AC, including voltage, current, power, energy and frequency measurement.
Technical Summary
| Product type | SM 1238, AI energy meter 480 V AC |
|---|---|
| Voltage measurement | 0 V to 293 V phase to neutral; 0 V to 508 V between line conductors |
| Current measurement | 1% to 100% relative to the secondary rated current 5 A |
| Frequency measurement | 45 Hz to 65 Hz |
| Measurement values | Voltage, current, phase angle, power, energy and frequency |
| Cycle time | 50 ms, all channels; consistent update of all measured and calculated values |
| Supply | DC, from CPU |
| Maximum current consumption | 180 mA |
| Address space | 124 byte; 112 byte input / 12 byte output |
| Mounting position | Horizontal, vertical |
| Firmware version | V2.0.1 |
| Protection and isolation | Potential separation between channels and backplane bus: 3 700V AC (type test) CAT III |
Key Features
Measures voltage, current, phase angles, active and reactive power, active and reactive energy, and frequency.
Measures line voltage up to 480 V and supports current measurement from 1% to 100% relative to the secondary rated current 5 A.
Provides TRMS voltage and current measurement, seamless measured value acquisition, and a typical 50 ms cycle time for consistent updates of all measured and calculated values.
Supports cyclic and acyclic measurement, diagnostic and limit value alarms, channel diagnostics, and reparameterization and calibration in RUN.
Mounting position is horizontal or vertical. The DC supply is from the CPU, with maximum current consumption of 180 mA.
Frequently Asked Questions
What is the exact Siemens line item?
It is Siemens 6ES7238-5XA32-0XB0, an SM 1238, AI energy meter 480 V AC.
Which electrical quantities does the module measure?
It measures voltage, current, phase angles, active and reactive power, active and reactive energy, and frequency.
How should this module be included in a project quotation?
Provide the requested quantity, destination, schedule context, and any additional BOM lines for the quotation request.
