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National Instruments 776575-57 High Voltage Backplane Adapter 

National Instruments part number 776575-57 is an identifying part number for the SCXI-1357, a High Voltage Backplane Adapter with 4 slots and a maximum cable length of 2 meters. The NI SCXI-1357 has part numbers 776575-57, 776575-571, 776575-572, and 185008B-01. Part number 776575-57 includes only the backplane. The other part numbers are kits. Part number 776575-571 includes a 1-meter cable, while part number 776575-572 includes a 2-meter cable. These cables are used to route analog and digital signals to an external scanning DMM. The NI 776575-57 operates in multiplexed mode, requiring only a single cable assembly to connect a multimodule SCXI system to one measurement device. 

This High Voltage Backplane Adapter functions with a maximum current of 2 ADC, 2 AAC per channel and has a 10-pin rear connector. It supports USB 2.0 full-speed specification with a data transfer speed of 12 Mb per second and USB power requirements of 25 mA typical and a maximum of 100 mA at +5 VDC. This adapter can control various NI switch modules, including the SCXI-1127, SCXI-1128, SCXI-1129, SCXI-1130, SCXI-1175, SCXI–1166, SCXI–1167, SCXI–1169, SCXI–1193, SCXI–1194, and SCXI–1195. It is compatible with NI-4060, PXI-1010, and PXI-4070 SCXI Controllers and links SCXI systems to measurement devices. 

Additionally, the NI 776575-57 features a 4-slot high-voltage analog bus and a mounting bracket for a reliable connection to the SCXI chassis. It is shielded for better accuracy and supports multichassis configurations. National Instruments has declared obsolete status for the 776575-57, however it is still available for purchase on the Apex Waves Website.