Due to a supply shortage, NI discontinued the NI TBX-50 (P/N: 779305-01) and replaced it with a similar screw terminal accessory, the NI TBX-50B (P/N: 782866-01). The original "Read Me First NI TBX-50" documentation was incorrectly removed in the driver after the transition to the new product.
More information on the TBX-50B can be found in the Read Me First article.
The table below shows the detailed difference between the old and new accessories.
Differences between TBX-50 and TBX-50B
|NI Part Number||779305-01||782866-01|
|Max Voltage (V)||125||150|
|Max Current (UL Recognition, A)||2.5||2.5|
|# of Positions||50||50|
|Connector Type||50-Pin D-Sub, Male||50-Pin D-Sub, Male|
|Mounting Method||DIN Rail||DIN Rail|
The image below shows the differences in physical appearance between the terminal blocks.