USB-9234 780235-01 National Instruments

Note This terminal block is manufactured by Phoenix Contact. The Phoenix Contact part 

number is 2283647.

This document describes the connector and screw terminal pinouts of the 

NI TBX-50 terminal block.

The NI TBX-50 terminal block is DIN rail-mountable with screw terminals 

to connect the signals to the switch and includes a probe socket and a 50 pin 

D-SUB male connector.

Specifications

Maximum voltage .................................. 125 V

Maximum current................................... 2.5 A

Caution For hazardous voltage applications or measurements (>42.4 Vpk/60 VDC), install 

the NI TBX-50 in a UL listed, suitably rated NEMA or IP enclosure.

Refer to Figure 1 for the connector pin locations on the NI TBX-50.