The National Instruments SCXI-1175 (Part Number: 776572-75) is a high-density matrix/multiplexer switch module designed to effectively route multiple signals to measurement devices or from source units. Each of the 196 channels utilizes robust electromechanical relays to ensure reliable performance, making it particularly suitable for automated test applications requiring a large number of channels. The SCXI-1175 is rated for Measurement Category I and supports signal voltages up to 100 V, withstanding impulse voltages of up to 500 V. Connectivity is achieved through the SH9MD-AUX control cable (available in lengths of 1 or 2 meters) or a standard 1-meter USB cable for USB-13xx applications. Additionally, the module supports configurations that allow multiplexed or switched signals to be transmitted between chassis using a high-voltage HV8-HV8 cable, and users can connect signals from the HVAB to DMM banana jack inputs using an HV8-BAN4 cable. The SCXI-1175 offers a maximum switching power of 30 W per channel and a maximum total current capacity of 1 A, with impressive DC isolation resistance greater than 1 GΩ. Relay operation boasts a typical timing of 1 ms, and the maximum voltage across channels is specified at 100 V. Although the SCXI-1175 has been designated obsolete by National Instruments, it remains available for purchase and repair through Apex Waves, ensuring continued support for users. Both user and maintenance manuals are readily available for download, and inquiries for pricing should be directed to a sales representative.