Key Features
- Energy metering module: SM 1238, AI energy meter 480 V AC for data acquisition in 1- and 3-phase supply systems (TN, TT) up to 480 V AC.
- Measured values: Acquisition of voltage, current, phase angles, power, energy values, and frequencies.
- Diagnostics: Channel diagnostics with diagnostic alarm, limit value alarm, and LED status indication.
- Engineering and operation: STEP 7 TIA Portal configurable/integrated from version V13 SP1, with cyclic and acyclic measurement and measured value access.
- Installation and supply: Mounting position: Horizontal, vertical; supply voltage: from CPU; type of supply voltage: DC.
Applications
- Energy and power measurement in supply systems: Energy, power, active power, and reactive power measurement in 1- and 3-phase supply systems (TN, TT) up to 480 V AC.
- Electrical data acquisition: Voltage, current, phase angle, and frequency acquisition for monitored supply systems.
Technical Summary
| Product type designation | SM 1238, AI energy meter 480 V AC |
|---|---|
| Firmware version | V2.0.1 |
| Engineering with STEP 7 TIA Portal | V13 SP1 |
| Mounting position | Horizontal, vertical |
| Supply voltage design | from CPU |
| Type of supply voltage | DC |
| Current consumption, max. | 180 mA |
| Power loss, typ. | 0.75 W |
| Measurable line voltage between the line conductors, max. | 508 V |
| Continuous current with AC, maximum permissible | 5 A |
| Cycle time (all channels), typ. | 50 ms |
| Potential separation between the channels and backplane bus | Yes; 3 700V AC (type test) CAT III |
Frequently Asked Questions
What is the Siemens 6ES7238-5XA32-0XB0 used for?
It is an SM 1238 AI energy meter 480 V AC for data acquisition in 1- and 3-phase supply systems (TN, TT) up to 480 V AC.
Which measurements does this module provide?
It provides voltage measurement, current measurement, energy measurement, frequency measurement, power measurement, active power measurement, and reactive power measurement.
What supply and installation details should be checked before ordering?
Check that the module is supplied from CPU with DC supply voltage, that the current consumption, max. is 180 mA, and that the mounting position is Horizontal or vertical.
What voltage and current limits are listed for this energy meter?
The measurable line voltage between the line conductors, max. is 508 V, and the Continuous current with AC, maximum permissible is 5 A.
