X20DIF371 B & R Automation
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The X20DIF371 is an input module from B & R Automation, part of the X20 Fieldbus Input Output Modules series. It features 16 input channels with sink logic and operates at a nominal input voltage of 24 VDC. The module has an IP20 protection rating, is rated for up to 15 g shock resistance, and can function in non-condensing conditions with a maximum humidity of 95% RH.
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Product Description:
The X20DIF371 is a digital input slice from the X20 Fieldbus Input Output Modules series manufactured by B&R Automation. Within a distributed control system, this part collects on/off signals from field sensors and transfers them to a host PLC over the X20 backplane, allowing the controller to monitor discrete states such as limit switches, pushbuttons, and proximity detectors. This type of module is used when a machine controller needs clear status information from standard discrete devices without converting analog values or adding separate interface relays.
The module provides 16 electrically isolated inputs that share a common internal supply and require a Sink wiring scheme, meaning current flows into the device from the sensor. Each channel is designed for a nominal level of 24 VDC, so matching field wiring to this voltage helps prevent false transitions and unreliable state changes. Reliable startup is maintained down to -25°C, which supports cold-room machinery, while a horizontal installation may reach ambient temperatures of 60°C without derating. The circuitry also tolerates installation heights up to 2000 m, matching typical plant elevations before reduced air density begins to affect cooling or dielectric spacing. Humidity can rise to 95% RH provided the atmosphere remains non-condensing, and the overvoltage category II classification indicates the impulse levels the inputs must withstand relative to the system supply.
A shock resistance of 15 g protects the internal electronics during handling or when the module is mounted on machinery that experiences impact loading. The housing carries an IP20 rating, which provides finger protection while still relying on the control cabinet for broader enclosure protection. When the module is oriented vertically, ambient temperature must not exceed 50°C, so enclosure layout should allow free air movement around the slice. Cabinet mounting also helps shield the module from dust, moisture, and accidental contact during normal machine operation.
