0GH-AM050 B & R Automation
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The B & R Automation 0GH-AM050 is part of the 0GH PLC Modules series and features four analog inputs and four analog outputs, each with 12-bit resolution. It supports differential input types with input signals from 0 to 10 V, and provides output signals of ±10 V with short-circuit proof output protection. This module has channel-to-PLC isolation, an IP20 protection rating, and a total power consumption of 6.5 watts.
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Product Description:
The 0GH-AM050 is an analog input/output expansion for the 0GH PLC Modules series manufactured by B&R Automation. Installed on the system backplane, the module adds four voltage-measuring channels and four voltage-driving channels to a controller, allowing the PLC to monitor process signals and drive actuators without external converters. In industrial automation architectures, it serves as the interface between low-level sensors, such as pressure or position transducers, and the digital logic executed in the CPU. This arrangement supports closed-loop tasks where measured values must be compared with command values in real time.
The input side uses a 12-bit successive-approximation ADC across its four channels. The conversion error remains within ±0.1% at 25 °C, so feedback loops can rely on consistent scaling without additional calibration. Each input presents 2 MΩ of impedance, minimizing loading on high-impedance transmitters. Voltage ranges from 0 to 10 V are accepted, and the Differential Input circuit design helps reject common-mode noise that is typical on long cable runs. Although there is no channel-to-channel isolation, each group is galvanically separated from the PLC backplane. The module carries an IP20 housing intended for installation inside a protected cabinet.
On the output side, a 4-channel DAC with 12-bit resolution sources control voltages for connected field devices. Drive precision remains within ±0.3% at 25 °C, and each channel can swing the full ±10 V span needed by most analog servo drives and proportional valves. The circuits are Short-Circuit Proof, so an accidental load fault will not damage the module. Overall dissipation does not exceed 6.5 W, permitting dense rack layouts without external cooling. Field wiring lands on terminal block TB170, and the enclosure shields the internal electronics from incidental contact while still allowing convection airflow.
