Product Description:

The 2AO725.6 analog output module is built by B&R Automation as a member of the System 2010 Controllers series. Designed for the system’s I/O rack, it converts numeric setpoints into regulated unipolar current, allowing a controller to drive actuators, indicators, or data acquisition equipment directly over long shielded cable runs. By providing eight independent current channels on one card, it helps compact machines maintain precise closed-loop control without external signal conditioners.

Each channel settles within 250 µsec, so a full eight-channel update completes within one millisecond. The card’s digital-to-analog converter has a resolution of 12-bit, and a current step of 4.88 µA gives the smallest output increment that can be commanded by the CPU. Current is delivered across a range of 0 to 20 mA and remains monotonic with loads up to 600 Ω. The board provides 8 field connections, but there is no galvanic separation between the channels themselves, so shared returns can allow common-mode errors to spread. Short-circuit protection immediately limits overload conditions, while output-to-PCC isolation maintains a safe barrier between field power and the controller backplane.

During calibration at 20 °C, the module maintains a basic precision of ±0.5%, and that tolerance changes only to ±0.75% across the 0 to 60 °C operating range. A built-in filter rolls off frequencies above 1 kHz, which helps reduce carrier noise before it reaches the transducer coil. The backplane transfers setpoints as 16-bit integers in INT16 format, which helps keep processor overhead low. Power drawn from the rack supply does not exceed 10 W max., and the overall dimensions of 285 × 40 × 185 mm help the card fit standard cabinet depths while the unipolar output structure keeps wiring straightforward by referencing all currents to the common terminal.