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- Siemens 6ES7531-7NF00-0AB0 SIMATIC S7-1500 AI 8xU/I HF 24-Bit Analog Input Module Siemens 6ES7531-7NF00-0AB0 SIMATIC S7-1500 AI 8xU/I HF 24-Bit Analog Input Module
Siemens 6ES7531-7NF00-0AB0 SIMATIC S7-1500 AI 8xU/I HF 24-Bit Analog Input Module
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- Description
The Siemens 6ES7531-7NF00-0AB0 SIMATIC S7-1500 AI 8xU/I HF module reads 8 analog channels configurable for voltage or current, at up to 24-bit resolution with plus/minus 0.1% operational accuracy. It supports measuring-range adjustment and calibration in RUN, draws 55 mA at 19.2 V supply, and dissipates 1.9 W typical, with 16 byte input address space.
Technical Specifications
| SKU | 6ES7531-7NF00-0AB0 |
| Brand | Siemens |
| Series | SIMATIC S7-1500 |
| Product Type Designation | AI 8xU/I HF |
| HW Functional Status | from FS01 |
| Firmware Version | V1.1.0 |
| Supply Voltage | 24 V DC (19.2-28.8 V) |
| Current Consumption, max. | 55 mA (at 19.2 V) |
| Power Loss, typ. | 1.9 W |
| Analog Inputs | 8, voltage and current |
| Voltage Ranges | 1-5 V, -2.5 to +2.5 V, -5 to +5 V, -10 to +10 V |
| Current Ranges | 0-20 mA, -20 to +20 mA, 4-20 mA |
| Resolution, max. | 24 bit (REAL format), 16 bit (S7 INTEGER) |
| Basic Error Limit (25 C) | +/-0.05% |
| Operational Error Limit | +/-0.1% |
| Common Mode Voltage, max. | 60 V DC / 30 V AC |
| Isolation Test Voltage | 2 000 V DC (channels, backplane, supply L+) |
| Cable Length, shielded, max. | 800 m |
| Dimensions (W x H x D) | 35 x 147 x 129 mm |
| Weight | 280 g |
| Note | Front connector (screw-in or push-in) ordered separately |
Selection Notes
The AI 8xU/I HF combines voltage and current inputs on the same 8 channels and reaches up to 24-bit resolution in Fast mode when the project uses scaled REAL format, dropping to 16-bit INTEGER in S7 format — decide the data format before relying on the extra resolution. Its 60 V DC / 30 V AC common-mode voltage rating and 2 000 V DC isolation test between channels, backplane bus, and supply voltage L+ exceed a standard-accuracy analog module, which is the reason to specify the HF variant on installations with mixed ground potentials or tighter channel-to-channel isolation needs. Front connectors, screw-in or push-in, are not included and must be ordered separately.
Applications
Fits S7-1500 process I/O needing mixed voltage and current instrumentation on one module: 4-20 mA transmitters, plus/minus 10 V position feedback, and installations where channel isolation matters more than on a standard-accuracy analog module.