Product Overview

The Bachmann AIO208 (Part Number: 00020628-00) provides a high-density, flexible solution for analog signal processing within the M1 automation platform. This module features 8 universal channels that engineers can individually configure as either inputs or outputs. It supports all industrial standard signals, including voltage (±10 V) and current (4–20 mA), making it the primary interface for pressure transmitters, flow meters, and proportional valves. We supply this module in 100% Brand New original condition, ensuring 16-bit measurement precision for your critical process control loops.

Technical Specifications

The AIO208 utilizes advanced A/D and D/A converters to deliver linear, high-resolution performance across the entire signal spectrum.

Engineering Advantages

The AIO208 architecture resolves the common industrial challenge of mixed-signal requirements by consolidating inputs and outputs into a single hardware footprint.

• Hybrid Channel Configuration: Each of the 8 channels operates independently. This eliminates the need to purchase separate 4-channel input and 4-channel output cards, effectively halving the required DIN rail space for small-to-medium scale analog tasks.

• Superior 16-Bit Resolution: High-bit-depth conversion allows the module to maintain extreme accuracy even when measuring signals that do not span the full range (such as a 0–5 V sensor mapped to a 0–10 V range). This provides the "overhead" necessary for precise PID tuning in temperature and pressure control.

• Galvanic Bus Protection: Integrated galvanic isolation shields the sensitive M1 system bus from field-side electrical noise and ground loops. This protection prevents transient surges from damaging the central CPU or other I/O modules in the rack.

• Comprehensive Signal Support: The module handles standard ±10 V to ±10 mV voltage ranges and 0/4–20 mA current loops. This broad compatibility allows you to standardize on the AIO208 across diverse sectors, including wind energy, marine engineering, and process manufacturing.

• Real-Time Diagnostics: Built-in monitoring circuits detect wire breaks (in 4–20 mA mode) and short circuits. The module reports these errors directly to the CPU, allowing for immediate alarm triggering and reduced troubleshooting time.

FAQs

• Can I configure 4 channels as inputs and 4 as outputs simultaneously?

  Yes. The AIO208 allows for any combination of inputs and outputs within its 8-channel limit. You define the function of each channel during the software configuration phase in the Bachmann SolutionCenter.

• Does the module require external power for 4–20 mA loops?

  The module typically requires an external 24V DC supply to power the analog circuitry and field-side loops. Ensure your power supply provides clean, regulated DC to maintain the ±0.1% accuracy specification.

• Is the AIO208 compatible with the AIO216?

  Both modules belong to the same Bachmann analog family and share signal characteristics. The AIO208 offers 8 channels, while the AIO216 provides 16 channels for higher-density applications. They are interchangeable in terms of logic and signal type support.

• How do I handle signals smaller than 10V, such as 0–5V?

  The 16-bit resolution provides high granularity even if the physical signal only utilizes half of the 0–10V range. You simply scale the values within the PLC software to match your specific sensor calibration.