Overview
The X20AI8321 is a high-precision, 8-channel analog input module for B&R’s X20 automation system, supporting voltage and current signals with 16-bit resolution. Designed for industrial process control, it delivers accurate measurement for sensors, transmitters, and other analog field devices.

Key Specifications
1. Input Configuration
Channels: 8 differential inputs (individually configurable)

Signal Types:

Voltage: ±10V, 0–10V, 1–5V

Current: 0–20 mA, 4–20 mA (with 125Ω internal resistor)

Resolution: 16-bit (65,536 steps)

Accuracy: ±0.1% of full scale (typical at 25°C)

Sampling Rate: 100 µs per channel (max.)

2. Electrical Isolation & Protection
Isolation: 500V channel-to-channel & channel-to-bus

Overvoltage Protection: ±35V continuous

Open-Circuit Detection: For current inputs (4–20 mA)

3. Diagnostics & Integration
Per-Channel LEDs: Signal activity & fault indication

Hot-Swappable: Yes (controller-dependent)

Configuration: Via B&R Automation Studio

4. Environmental & Mechanical
Connection: Removable screw terminal (X20TBxx)

Operating Temperature: -20°C to +60°C

Humidity: 5–95% RH (non-condensing)

Vibration/Shock: 5g / 15g (IEC 60068-2-6/27)

5. Certifications
CE, UL, RoHS

EMC: EN 61000-6-2 (Immunity), EN 61000-6-4 (Emissions)

Industrial Standards: IEC 61131-2

Typical Applications
✔ Process Control (pressure, temperature, flow monitoring)
✔ Machine Automation (analog sensor interfacing)
✔ Test & Measurement Systems
✔ Energy Management (current/voltage measurement)

Why Choose X20AI8321?
✅ High Accuracy – 16-bit resolution for precise measurements
✅ Flexible Signal Support – Voltage/current inputs on all channels
✅ Fast Sampling – 100 µs per channel for real-time control
✅ Industrial Robustness – Wide temperature range & isolation

Note: Requires X20 backplane (e.g., X20BM11) and 24V DC power (e.g., X20PS2100).