Product Description:

The 7AO352.7 is an analog output module manufactured by B&R Automation for use in the System 2003 Controllers series. Installed on the system I/O backbone, it generates regulated voltage or current signals for actuators, positioners, and external signal conditioners in industrial automation equipment. By converting digital setpoints from the CPU into proportional analog outputs, the module supports closed-loop control of speed, pressure, flow, and similar process variables. This role makes it useful wherever a controller must send a stable analog reference to a field device rather than switch a discrete output on or off.

The module uses a 12-bit digital-to-analog converter, providing 4,096 discrete output levels across its 2 output channels. Each channel can operate in a current range of 0 to 20 mA or a bipolar voltage range of ±10 V, and the required mode is selected through system configuration. In current mode, the connected loop can present up to 400 Ω of load without exceeding the module’s compliance capability. Current gain error is limited to ±0.06%, current linearity error to ±0.13% of the final value, and current offset to ±5.3 µA. In voltage mode, gain error remains within ±0.3%, linearity error stays within ±0.13%, and offset is limited to ±5.2 mV, which helps maintain accurate analog control in feedback-based applications.

Output demand remains moderate, with a maximum of 10 mA drawn per channel in voltage mode, while total module consumption is limited to 1.2 W. The electronics are housed in an IP20 enclosure, so the module must be installed inside a protected cabinet or control enclosure. In horizontal mounting, the permitted ambient range is 0 °C to +60 °C, while vertical mounting is limited to 50 °C. The modest power draw helps reduce thermal load in dense PLC racks, and observing the mounting limits helps the converter maintain stable output behavior during continuous operation.