Product Description:

The X20AI4632-1 is an analog input module engineered by B & R Automation as part of the X20 Fieldbus Input Output Modules series. Occupying one slot on an X20 backplane, the unit converts low-level sensor signals into digital words that a controller can process. By moving measurement acquisition to the fieldbus terminal strip, it lets temperature, pressure, or position feedback be sampled close to the source, reducing wiring density and preserving signal integrity in distributed control architectures. This arrangement also supports remote I/O stations where controllers need stable feedback from process devices located away from the main cabinet.

Each channel accepts differential or single-ended signals, and the module provides 4 analog inputs, permitting a single slice to monitor multiple transducers simultaneously. Conversion is handled with 16-bit converter resolution, yielding 65,536 discrete counts for fine measurement granularity. For loop-powered transmitters, the front end tolerates a 0 to 22 mA current range, and voltage sources can be wired directly because the input supports a ±11 V voltage span. Integrated oscilloscope functions let the PLC capture raw sample sequences for time-domain diagnostics without external test equipment. That flexibility allows the same module to work with common process instruments in mixed-signal machine layouts.

Environmental limits keep those measurements stable during operation. With the rack mounted horizontally, ambient air may rise to 60 °C before derating is required, while a vertical orientation lowers the ceiling to 50 °C because natural convection is reduced. Cold-start capability reaches down to -25 °C, allowing outdoor panels to boot after overnight exposure. Operation is permitted up to 2000 m elevation, maintaining accuracy in most plant locations without pressurization. The orientation-dependent thermal limit matters because module spacing and enclosure airflow can influence measurement stability during continuous use.