Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | SM 1238, AI energy meter 480 V AC |
| Measured values | Voltage, current, phase angles, power, energy values and frequency |
| Voltage measurement | 277 V phase-to-neutral; 480 V line-to-line |
| Current range | 1 A, 5 A |
| Cycle time, all channels, typ. | 50 ms |
| Measurement bandwidth | 2 kHz |
| Supply | From CPU; DC |
| Maximum current consumption | 180 mA |
| Mounting position | Horizontal, vertical |
| Firmware version | V2.0.1 |
Applications
- Electrical data acquisition: Measures voltage, current, phase angles, power, energy values and frequency in 1- and 3-phase TN and TT supply systems.
Key Features
- Energy meter analog input: SM 1238 measures voltage, current, phase angles, power, energy values and frequency.
- Voltage measurement: Measurable line voltage is 277 V between phase and neutral conductor and 480 V between line conductors.
- Current measurement: Current measurement supports 1 A and 5 A ranges with current transformers.
- Measurement timing: The typical cycle time for all channels is 50 ms, with a 2 kHz measurement bandwidth.
- Diagnostics and indicators: The module provides diagnostic and limit value alarms, channel status display, channel diagnostics and module diagnostics LEDs.
- Supply and mounting: Supply voltage comes from the CPU and is DC; mounting position is horizontal or vertical.
Frequently Asked Questions
1. What does the Siemens 6ES7238-5XA32-0XB0 measure?
It measures voltage, current, phase angles, power, energy values and frequency.
2. What voltage inputs does the SM 1238 support?
It measures 277 V between phase and neutral conductor and 480 V between line conductors.
3. What current ranges are supported?
The current ranges are 1 A and 5 A, with current transformers.
4. What is the typical cycle time?
The typical cycle time for all channels is 50 ms.
5. How is the module supplied and mounted?
Supply voltage comes from the CPU and is DC. The mounting position can be horizontal or vertical.
