Product Description:

The 0AC401.9 interface converter is manufactured by B&R Automation within the 0AC Interface Converters series. It functions as a fieldbus accessory that receives differential encoder feedback and forwards a conditioned output suitable for 24-volt controller inputs. By performing this electrical adaptation, the module allows motion axes equipped with incremental encoders to be integrated into standard PLC cabinets without requiring separate signal amplifiers or custom wiring, which simplifies installation in distributed automation racks that use a 24 VDC control backbone.

The incoming encoder lines enter through a 15-pin D-type female connector, and the circuitry tracks pulse trains up to 100 kHz without losing edge fidelity. It is designed for sources that present a 5 V differential signal, and the converter reshapes those levels to a 24 V single-ended format that typical digital input cards can read. Internal logic and drivers are supplied from a 24 VDC power rail that must be present on the control panel. Mechanical attachment follows the top-hat rail convention, allowing the unit to snap onto a 35 mm DIN rail alongside other I/O. This arrangement keeps wiring distances short and maintains a common reference between the converter and the associated controller.

For the connected encoder, the module provides an auxiliary supply of 500 mA at 5.25 VDC, delivered through the same D-type shell so no external regulator is required. Overcurrent events are limited by a replaceable 10 AT time-lag fuse located on the board. The plastic housing carries an IP20 rating and measures 112.5 mm in height, 77 mm in width, and 58 mm in depth, dimensions suited for compact control enclosures. Continuous operation is specified from 0 to 55 °C and from 0 to 95% relative humidity, while storage is permissible from −20 to 70 °C, keeping the converter suitable for common transport and standby conditions.