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July 2025
OP-8940
OP-8940, Passthrough, 32 Channels, Fault Insertion Module
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
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May 2025
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January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments OP-8940 32-Channel Pass-Through Fault Insertion Module
The National Instruments OP-8940 (Part Number: 787858-01) Pass-Through Fault Insertion Module is a 32-channel passthrough board designed for use with the NI SLSC-12001 platform during hardware-in-the-loop (HIL) testing. In order to replicate open or broken connections in switch, load, and signal conditioning (SLSC) modules, this module offers feed-through channels. The OP-8940 is also useful in a variety of testing settings because it allows fault injection via shorts between pins, shorts to battery voltages, and shorts to ground.
Across its 32 channels, the OP-8940 module has 112 independently programmable relays. Seven relays for fault injection are included in each pair of two signals, enabling extensive testing capabilities. With the proper terminal blocks, cables, and rear transition interfaces (RTIs), users can integrate the OP-8940 with PXI or CompactRIO modules and connect input signals to the RTI's fault buses. The module can be used in a variety of testing scenarios because of its flexibility.
Two sets of eight differential channels (or sixteen single-ended channels) make up the board architecture. Each group has a set of relays for fault insertion. With the Front Interface connectors on the left and the SLSC backplane connectors on the right, the board's configuration guarantees a streamlined design that makes integration with current systems simple. There are seven relays in each differential pair of signals in the Fault Insertion Unit (FIU) part of the OP-8940, for a total of 112 relays. Relays can be individually controlled, providing accurate fault simulation capabilities.
The FIU's use of relay technology enables great density and quick reaction times (<0.5 ms). But even for short periods of time, this technology is susceptible to peak current. Consumers are in charge of restricting the maximum current by adding resistors to the signal or VBus, depending on the cabling and capacitor in the circuit. Peak currents can approach 5A before the internal current limit trips, even though the VBus has a 0.1A power supply constraint. This could permanently harm the relay. An RMA may be issued for repair in the event that a relay fails in short mode. Furthermore, in order to repair a malfunctioning relay, OPAL-RT permits personnel who possess a valid IPC-610 certification and expertise doing through-hole lead-free and no-clean soldering.
| Model | OP-8940 |
|---|---|
| Part Number | 787858-01 |
| Part Type | Pass-Through Fault Insertion Module |
| Number of Channels | 32 Channels |
| Relay Count per Channel | 7 Relays per differential pair (total 112 relays) |
| Relay Control | Individually Configurable |
| Channel Configuration | Two groups of 8 differential channels (or 16 single-ended) |
| Response Time | <0.5ms |
| Fault Simulation Options | Open-circuit, Short-circuit, Fault injection with VBusA and VBusB |
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OP-8940 PDF Manuals
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