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  • 32 optically isolated input
  • All inputs are sampled simultaneously, at up to 1 Mb/s
  • Inputs are read in parallel for any size bus
  • Choice of sink or source inputs connection (anode and cathode side available).
  • Minimum current input of 3.6 mA
  • 5V to 30V input voltage
  • 30V maximum reverse

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Channel Description

The optically isolated inputs accept a wide input voltage range, from 5 to 30 Volts, according to user requirements. They have a low threshold current; typically 3.6 mA. Each input has reverse voltage protection of up to 30 Volts provided by a Schottky diode.OP4250-1 isolated digital input drawingImage Removed.

The schematic below represents the electrical circuit of one channel, from the Din+/Din- input signals coming for the unit under test (on the right) to the Din_FPGA signal going to the FPGA processor of the real-time simulator (on the left).

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  • When current flows from Din+ to Din-, the output of optocoupler (A) is low and the Din_FPGA signal is low.
  • When no current flows, the optocoupler output (A) is high and the Din_FPGA signal is high.

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  • Both Din+ and Din- pins (anode and cathode sides) are routed to the DB37F connector of the simulator and made available to the user

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Typical Applications

The diagrams below illustrate typical application examples.

INTERFACE BETWEEN CMOS DRIVE AND OPAL-RT Din

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  • The maximum current is 3.6mA 

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Typical Use Cases

The circuit makes it possible to use the module for activation or open-circuit detection, both in the high or low active state.

Typical high side activation (user high Dout)

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Typical low side activation (user low Dout)

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Typical high side open circuit detection

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Typical low side open circuit detection

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The OP4250-1 cassette includes the OP5353-1 mezzanine card.


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