X20RT8202 B & R Automation
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The B & R Automation X20RT8202 belongs to the X20 Fieldbus Input Output Modules series and features two analog outputs with a ±10 V range and a converter resolution of 13 bits. The module provides four digital inputs and four digital outputs, each with a voltage of 24 VDC and a response time of less than 1 microsecond.
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Product Description:
The X20RT8202 is a combined analog and digital I/O module manufactured by B&R Automation for the X20 Fieldbus Input Output Modules series. Mounted directly on an X20 backplane, it forwards field-level signals to the internal bus without requiring external terminal strips. The module integrates two voltage outputs and four configurable digital lines in a 24 mm housing, providing a compact way to drive actuators, light stacks, or reference generators while acquiring status inputs from proximity switches or limit sensors.
Each analog channel delivers a bipolar span of ±10 V, allowing the controller to create symmetrical setpoints for servo amplifiers or closed-loop drives. Conversion is handled by a 13-bit digital-to-analog section, resulting in a smallest step of approximately 2.44 mV across the full 20 V range. Output settling reaches the rated value within 2 µs, permitting high-frequency modulation in dynamic applications. The module provides 2 independent analog outputs, and their operation is electrically isolated from the logic supply to reduce the effects of ground offsets. It also has 4 configurable digital I/O channels that can operate as either inputs or outputs, allowing flexible assignment for interlock states, pulse trains, or onboard diagnostics without additional modules.
Digital outputs can switch up to 0.1 A per channel while maintaining the system’s 24-volt logic level. Both the sink and source paths are rated for 24 VDC, matching common sensors and relay coils used on industrial machinery. Input recognition and output switching share a reaction time of less than 1 µs, allowing rapid edge changes to be processed during high-speed operation. The module’s signal commons are referenced to the backplane shield, and the channels are grouped to minimize crosstalk when high-speed pulses are present. Mechanical keying helps prevent incorrect module placement on the backplane, while integrated LED diagnostics provide visible channel and operating status. Its narrow housing also conserves backplane space in control cabinets that require a mixture of analog control signals and high-speed digital connections.
