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NEXUS DSP & Controller Card XRI

The XRI boards for NEXUS base devices offer an abundance of GPIO contacts: The board has 24 inputs via optocouplers and 24 relay outputs. All contacts can be combined in pairs to form galvanically isolated connections; an internal control voltage is of course available on inputs and outputs. Integration with NEXUS Logic Control macro control allows extremely complex interactions with external systems.

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NEXUS – XRI – The concept:

An XRI board is the easiest way to connect a NEXUS system to external systems at the control level. 24 inputs and 24 outputs are available, each of which can be grouped in pairs and thus galvanically isolated from the internal circuit. The internal or external control voltage can be used to evaluate the contacts. The outputs are switched via relays, while the inputs are evaluated via optocouplers to ensure maximum operational reliability.

Logic Control macro control integrated in the NEXUS system allows simple to very complex interactions and automations to be set up. For this purpose, the autonomous logic units available in each base unit are used, which communicate with the entire NEXUS system. The functions range from setting or evaluating crosspoints to monitoring the levels of specific signals. All states allow the consideration of almost unlimited interdependencies and dependencies. In conjunction with the XRI card, relay inputs can be interrogated and set, e.g. to trigger the switching and control of external loads depending on logical relationships. This can also be used, for example, to integrate the NEXUS system into comprehensive external disaster systems or to trigger alarms.

NEXUS – XRI – Features:

Inquiry of external switching contacts and control voltages The inputs can be used to interrogate external switching contacts with internal or external voltage. External control voltages can also be queried.

Two internal power sources The board has two power sources that are galvanically isolated from the NEXUS system. One voltage can be used for external contacts, the other for the outputs. For smaller loads, the output power of 5V/20mA is sufficient.

Combination of two contacts to one potential-free contact When two contacts are combined, a potential-free contact can be created. The second contact loses its function because its line is used for the ground.

Interface to Nexus logic The XRI is predestined to be integrated into the extensive NEXUS logic to query switching contacts or output control voltages.

Configuring inputs and outputs In addition to configuring the floating contacts, the inputs and outputs of the XRI can also be assigned a voltage whose polarity can be changed.

Control by both positive and negative voltages Both DC and AC voltage can be used for control. A maximum permissible current of 1A or 4A peak current is possible at a voltage of up to 60V.

All inputs and outputs equipped with filters To avoid the effects of interference such as noisy signals or crosstalk, both inputs and outputs are equipped with filters whose time constant is adapted to the requirements of the software.

NEXUS - XRI - Use cases:

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NEXUS DSP & Controllers - Downloads:

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GPIO card: relay outputs and optocoupler inputs
Transparent transmission of serial control signals
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NEXUS - XRI - Downloads:

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