Purchase now: Wago 750-459 Analog Input Module
Purchase now: Atlantech Drives provides you the Wago 750-459, a high-density **Analog Input Module** for the Wago I/O System 750. This compact unit (12mm width) packs **4 Input Channels** capable of measuring standard **0 to 10 V DC** signals. It is the go-to solution for reading potentiometers, position transducers, HVAC damper actuators, and pressure sensors where voltage output is preferred over current loops.
Technical Specifications and Single-Ended Inputs
The 750-459 features **Single-Ended** inputs, meaning all four channels share a common internal ground reference (0V). This design trade-off allows for higher channel density. The module offers **12-bit resolution**, providing 4096 increments across the 10V range (approx. 2.44 mV per step). The inputs are protected against overvoltage up to 30V, preventing damage if someone accidentally connects 24V to the signal line.
- Part Number: 750-459.
- Channels: 4 Analog Inputs.
- Signal Type: 0…10 V DC.
- Connection: Single-Ended (Common Ground).
- Resolution: 12 bits.
- Input Resistance: > 100 kΩ.
- Conversion Time: ~3 ms per channel.
- Bit Width: 4 x 16 bits data.
- Wire Connection: CAGE CLAMP®.
Expert Installation Advice: Cable Impedance
Voltage signals are sensitive to distance. Expert Tip: Unlike 4-20mA current loops, 0-10V signals degrade over long distances due to voltage drop in the wire (V = I x R). Although the input impedance is high (>100 kΩ), drawing very little current, long cables pick up noise. Use **Shielded Twisted Pair** cables for all 0-10V runs exceeding 10 meters, and ground the shield at the cabinet entry point (Wago shield clamp) to prevent erratic readings.
Frequently Asked Questions (FAQs)
Q: How do I wire a potentiometer?
A: Connect the pot ends to 10V reference (requires external supply or potential multiplication terminal) and 0V. Connect the wiper (middle pin) to the Input (e.g., Terminal 1) of the 750-459.
Q: What happens if the input goes to 11V?
A: The module will saturate at the maximum digital value (32767 or similar depending on format) and trigger an «Overrange» diagnostic bit if configured. It won’t burn out until ~30V.
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