How to Connect Signals to the PXI/PXIe-2569 and SCXI-1169

Contents

Overview


Fig 1: PXI/PXIe-2569 and SCXI-1169


The National Instruments PXI/PXIe-2569 and SCXI-1169 are 100-channel general-purpose switch modules, featuring SPST (Form A) armature relays. Ideal for medium-power automated test loads, these modules offer maximum relay density, with 100 latching relays in a single PXI and SCXI slot.

 

Cabling options for PXI/PXIe 2569 and SCXI-1169

There are two cabling options available for the PXI/PXIe 2569 and SCXI-1169 available from National Instruments:

  • SH200LFH-4xDB50F-C: LFH200 to 50-pin D-SUB Switch Cable (CH-Com Twisted), 1m
  • SH200LFH- BAREWIRE: LFH200 Connector to Bare Wire Switch Cable, 2m

 

Signal Connection with SH200LFH-4xDB50F-C cable



Fig 2: SH200LFH-4xDB50F-C cable


The SH200LFH-4xDB50F-C cable is recommended for connecting the PXI/PXIe-2569 or SCXI-1169 to your system. One end of the cable terminates with an LFH200 connector. The other end of the cable terminates with four 50-pin female D-SUB connectors. The 50-pin female D-SUB connector is connected to a male 50-pin D-SUB terminal block which will be discussed in the terminal blocks section. For more instructions about the SH200LFH-4xDB50F-C cable, please refer to the LFH200 cable installation guide

 

Signal Connection with SH200LFH-BAREWIRE cable


Fig 3: SH200LFH-BARE WIRE


The SH200LFH-BARE WIRE cable is recommended for connecting the switch module to your system if termination other than 50-pin female D-SUB is required. One end of the cable terminates with an LFH200 connector. The other end of the cable has eight bundles of 25 unterminated, tinned, and stripped cables. As shown in Fig 2, each cable leg has 25. For more information about the SH200LFH-BAREWIRE cable, please refer to the LFH200 cable installation guide.

 

50 pin D-SUB Terminal Block from National Instruments



Fig 4: TBX-50 Terminal Reference


The NI TBX-50 or TBX-50B terminal blocks are 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. Using the cable options described above, connections are made between the four 50 pin terminal blocks TBX-50 and the PXI/PXIe-2569 or SCXI-1169. These terminal blocks can be used to access the terminals on your NI Switch. For more information on which pins correspond to each channel see the Installation Instructions for the DIN cable that you plan to use with your terminal block and NI Switch.


Third Party Terminal Block Options for the SH200LFH-4xDB50F-C cable

Using the SH200LFH-4xDB50F-C cable described described above, signal connections are made to screw terminals on a 50 pin terminal block from third party vendor. Terminal blocks from third party vendors are listed in the table below:

Accessory
Manufacturer
Part Number
VARIOFACE module, with screw connection
and 50 position D-Subminiature pin strip
FLK-D50 SUB/S
VARIOFACE module, with screw connection
and 50 position D-Subminiature pin strip
FLKM-D50 SUB/S
VARIOFACE module, with screw connection
and 50 position D-Subminiature pin strip
FLKMS-D50 SUB/S
VARIOFACE module, with screw connection
and 50 position D-Subminiature pin strip,
with LED indicators
FLKM-D50 SUB/S/LA


Third Party Accessories

Accessory
Manufacturer
Part Number
Terminal pin rows (four required per module)
Plug connector subassembly
Backshell Only
Mass interconnect cable assembly, 20 in.
Mass interconnect cable assembly, 36 in.
Mating ITA module (one required per module)
Mating ITA PC (198 required per module)