6ES7431-0HH00-0AB0 Siemens - Analog Input Card
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High-Density Analog Input Module for Precision Measurement
Connect 16 sensors to your S7-400 PLC with this versatile analog input module. The Siemens 6ES7431-0HH00-0AB0 reads both voltage and current signals. It offers 13-bit resolution for accurate monitoring of pressure, flow, level, and temperature (via transmitters). Perfect for high-channel count applications.
Complete Technical Specifications
Brand & Family: Siemens SIMATIC S7-400
Module Type: Analog Input SM 431
Full Order Number: 6ES7431-0HH00-0AB0
Input Channels: 16, non-isolated (common reference).
Signal Types: Voltage and Current.
Voltage Ranges: ±10V, ±1V, 1-5V.
Current Ranges: ±20mA, 4-20mA.
Resolution: 13 bits (including sign bit).
Conversion Time: 20 ms per channel (typical).
Basic Accuracy: ±0.25% of range (at 25°C).
Total Error: ±0.65% of range (over full temperature).
Input Impedance: Voltage: 10 MΩ (1V) / 100 kΩ (10V). Current: 50 Ω.
2-Wire Transmitter Supply: 24V DC, up to 400 mA total.
Max Cable Length: 200 meters (shielded).
Power from Backplane: 5V DC, max. 100 mA.
Module Power Loss: Typical 2 W.
Dimensions: 25 mm (W) x 290 mm (H) x 210 mm (D).
Net Weight: Approximately 500 grams.
Installation & Wiring Guide
Install this 6ES7431-0HH00-0AB0 module into any free slot in your S7-400 rack. Use shielded twisted-pair cables for all analog signals. Connect the shield to ground at the PLC end only. For 4-20mA 2-wire transmitters, use the module's internal 24V supply (L+). Ensure all sensor commons are connected correctly as the module is non-isolated.
Warranty & Shipping
This product is covered by a 12-month warranty. We ensure fast delivery via FedEx, UPS, or DHL.
Expert FAQ
Q: Can I measure temperature directly with this module?
A: No, it does not directly support thermocouples or RTDs. You must use a temperature transmitter that converts the signal to 4-20mA or 0-10V first.
Q: What does "non-isolated" mean for my wiring?
A: It means all 16 channels share a common electrical reference point (MANA). All your sensors must be grounded to the same potential to avoid measurement errors or damage.
Q: How do I power my 4-20mA sensors?
A: The module provides a 24V L+ supply. Connect the positive side of your 2-wire transmitter to this L+ terminal, and the signal wire to the analog input. It can power up to 16 sensors (400mA total).
Q: What is the difference between basic error and operational error?
A: Basic error (±0.25%) is the accuracy at a perfect 25°C lab condition. Operational error (±0.65%) includes the added effect of temperature changes in a real panel, giving you the true expected accuracy.
Q: Why is the cable length limited to 200m?
A> This limit ensures signal integrity and accuracy. Longer cables increase electrical resistance and noise pickup, which can distort the small analog signals. For longer runs, consider using signal conditioners.
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