Product Description:

The 2AI730.6 analog input card is produced by B&R Automation and belongs to the System 2010 Controllers series. Designed for the series backplane, it offers eight isolated channels that translate low-level sensor voltages into controller-readable integers. By inserting the module beside CPU and output boards, a machine builder can capture process variables such as pressure or temperature and pass them to the application program for closed-loop control, alarming, or data logging within an industrial line.

Each channel is handled by a Sigma-Delta converter with a continuous acquisition time of 20 msec at 50 Hz mains frequency, while the programmable trigger sequence requires 60 msec to sample all eight inputs. The conversion result is delivered with 16-bit resolution in INT16 binary format, giving an integral code span that supports an overrange value of 7FFF and an underrange value of 8001. Linearity is maintained through a precision of ±0.042 % at 25 °C, and the zero-point error is limited to ±0.002 %. An analog low-pass with a cutoff at 80 Hz suppresses higher-frequency noise, and the input impedance remains below 130 Ω, minimizing loading on the instrument loop.

Electrical protection features are integrated. Channel-to-ground isolation withstands 4000 V, and transients up to 42 VDC are clamped before they reach the converter. Normal working potential between the channel and ground is rated up to 300 Veff, allowing connection to floating measurement points in mixed-voltage cabinets. For position sensors, the board can source up to 30 mA from its encoder supply pin. Eight hardware inputs share this supply and are scanned by the same Sigma-Delta logic, coordinated by a 50 Hz synchronizing trigger. Built-in overvoltage arresters help reduce the effect of routine plant switching operations on the input circuitry.