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The OP8910 is a 32 channel digital input/output board with fault insertion as an option, compatible with the NI SLSC-12001 Platform.


  • Signal conditioning & FIU on a single board
  • Low latency < 20ns, High resolution of 10ns with 100 MHz FPGA.
  • Digital In programmable threshold 0-50V.
  • Digital Out TTL, max output current: 32 mA/ch or 800 mA total combined
  • Fault insertions module FIU as an option

For a full description of the OP8900 series boards' FIU (fault insertion) unit, see here.

Board Architecture

The board features a combination of 32 input and output channels and a set of relays adding fault insertion capability for each signal.

The general layout of the board is as follows, with the Front Interface connectors on the left and the SLSC backplane connectors on the right: 

The input/output conditioning is managed by the Type B OP5367 module.

A CPLD is used to configure the fault insertion unit (FIU) section and the OP5367.  It is responsible for the communication of the SLSC card within the NI environment for identification, error reporting, etc. It also receives configuration from the software and applies it to the FIU and to some of the I/Os.

The FIU specification and topology is common to all OP8900 boards.

Channels description

Digital Inputs

The input channels are located on the OP5367 mezzanine. The voltage range is 0 - 50V. Both high and low voltages are programmable per group of 8 channels over the whole range.

The channels are protected for ±50VDC and ±50VAC.

Digital Outputs

The output channels are located on the OP5367 mezzanine. Their electronic circuit is presented below.

The channels are singled-ended and LVTTL (3.3V) or TTL (5V) compliant (see OP8910 Installation and Configuration for voltage selection) They are protected in case of short-circuits.

Note: Initial values and complementary outputs are not managed by the OP5367.

OP8910 Configurations

Several assemblies of the OP8910 are available, as listed below, with different numbers of inputs and outputs, and with or without the FIU section populated.

Part NumberDescriptionDigital InDigital OutDigital Out TypeFIU
OP8911-F32 Dout LVTTL/TTL with FIU SLSC Conditioning Board032TTL32 single-ended FIU
OP8911-N32 Dout LVTTL/TTL SLSC Conditioning Board032TTLN/A
OP8913-F16 Din/16 Dout LVTTL/TTL with FIU SLSC Conditioning Board1616TTL32 single-ended FIU
OP8913-N16 Din/16 Dout LVTTL/TTL SLSC Conditioning Board1616TTLN/A
OP8915-F32 Din with FIU SLSC Conditioning Board320N/A32 single-ended FIU
OP8915-N32 Din SLSC Conditioning Board320N/AN/A

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