7XX412.50-1 B & R Automation
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The B & R Automation 7XX412.50-1 is a bus controller from the 7XX Bus Controllers series, featuring sixteen digital outputs and eight thermocouple inputs with sixteen-bit resolution. It operates with a supply voltage of 24 VDC and a maximum switching frequency of 100 Hz. The controller measures 80 by 170 by 30 millimeters and offers IP20 protection with a power consumption of 4.0 W.
Internal Product Review
The 7XX412.50-1 is a B & R Automation bus controller configured as an X2X Link Slave with 8 thermocouple inputs. A 16-bit thermocouple resolution and 300 µs maximum conversion time support accurate, responsive signal processing. IP20 protection and 24 VDC supply make the module a strong fit for dependable cabinet-level temperature acquisition.
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Product Description:
The 7XX412.50-1 is an I/O bus controller produced by B&R Automation within the 7XX Bus Controllers series. Installed on DIN rail segments, it links field signals to the main CPU over the X2X backplane so that temperature, voltage, and contact states can be processed in real time. In an automation cell, this device concentrates up to eight thermocouple channels, multiple analog ranges, and discrete outputs, reducing cabinet wiring.
This controller operates from a supply of 24 VDC while drawing only 4.0 W, a combination that limits heat generation inside narrow enclosures. Its housing measures 80 × 170 × 30 mm, allowing high channel density on crowded mounting rails. The front panel carries 16 digital outputs that switch actuators or relays, and each channel is galvanically isolated from logic power to help prevent fault propagation. For temperature loops, it offers 8 thermocouple inputs, each with internal cold-junction compensation so external reference blocks are unnecessary. The enclosure meets IP20 protection, meaning tools or fingers cannot touch live circuitry, but the device must remain in a closed control cabinet.
Signal processing completes in as little as 300 µs, so the module can forward fresh data to the X2X network within a single PLC scan on high-speed machines. Output drivers can toggle loads up to 100 Hz, supporting proportional valve control or rapid diverter gates. Resistance probes are digitized with 11-bit resolution, while separate converters provide 12-bit resolution for ±10 V inputs and 16-bit resolution for thermocouples. A 20 MΩ input impedance keeps loading on delicate sensors minimal, and the 1 mA measuring current stays below levels that could cause self-heating in RTDs. The slave interface automatically handles terminal compensation, so field wiring lengths do not affect measurement accuracy.
