The National Instruments SCXI-1167 Relay Switch Module is a versatile component designed for use within SCXI (Signal Conditioning eXtension for Instrumentation) systems. This module features 64 integrated channels, enabling control of up to 64 single-side stable relays and 32 two-coil latching relays, making it suitable for a variety of applications, including test system integration. The SCXI-1167 can drive small DC motors and inductive relay coils with a maximum capacity of 50 V, and it can support external power supplies to provide drive capabilities of up to 600 mA per channel.

Safety and reliability are paramount in the SCXI-1167, which includes overvoltage and overcurrent protection mechanisms to safeguard internal components during high-stress conditions, thus ensuring durability and extended operational life. Additionally, the module includes an auto-reset feature that allows auto channels to recover after protection events, preventing module partitioning. For enhanced protection, a fly-back diode is incorporated to mitigate potential damage from inductive load conditions.

The SCXI-1167 is equipped with an auto-scanning function that significantly enhances throughput in autotest applications, allowing the module to manage up to 32,000 connections efficiently. This functionality is supported by the NI-SWITCH driver software, which complies with IVI standards, facilitating seamless programming, configuration, and management of high-channel switching systems.

Although the SCXI-1167 has been designated as obsolete by National Instruments, it remains available for purchase and repair through Apex Waves. For more detailed technical specifications, please refer to the user and maintenance manuals available for download.