TBX Terminal Block

Selection Guide

Use the following steps to select the correct combination

of TBX terminal blocks and cables for your SCXI system:

1. Select the required terminal blocks – For each

SCXI module, use table 1 to select the proper TBX

terminal block. If a TBX-13xx terminal block is not

available for your SCXI module, select the appropriate

number of general-purpose TBX-24F feedthrough

terminal blocks.

2. Select cabling – For each TBX terminal block, table

1 lists the cable needed to connect the TBX terminal

block to the SCXI module. Shielded cables are available

in lengths of 1, 2, and 5 m. If using the TBX-1303, you

also have the option to build a custom cable using the

SBS-96F backshell kit. For each TBX-1303 for which you

will build a custom cable, select two SBS-96F kits.

If using the TBX-24F, you will use discrete wires to

connect the TBX-24F to an SCXI front-mounting terminal

block. Therefore, select the appropriate SCXI front-

mounting terminal block for each SCXI module that

will use the TBX-24F.

3. Rack-mount accessory (optional) – If mounting

for 19 in. rack enclosures is needed, use table 2 to select

the appropriate number of TBX-RM1 rack-mount kits.

4. Calibration – Calibration of cold-junction sensors

and attenuation terminal blocks is available for some

devices. For more information, please visit

SCXI Terminal Blocks

2

BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)

Module

Terminal Blocks

Other Terminal Block Functions

SCXI-1100



Isothermal, signal ground referencing, and open thermocouple detection

SCXI-1102



–

SCXI-1102B

SCXI-1308

–

Current input, 249

Ω resistor across each input

SCXI-1102C

BNC-2095

–

BNC connectors, signal ground referencing

TC-2095



Thermocouple plugs, signal ground referencing, isothermal

SCXI-1104/C

SCXI-1300

–

–

SCXI-1120

SCXI-1305

–

BNC connectors, AC/DC coupling and ground referencing

SCXI-1120D

SCXI-1320



–

SCXI-1126

SCXI-1327



SCXI-1328



Isothermal, high-accuracy design for thermocouples

SCXI-1338



Current input, 249

Ω resistor across each input

SCXI-1125

SCXI-1304/5

–

BNC connectors, AC/DC coupling and ground referencing

SCXI-1313A



SCXI-1320



–

SCXI-1327



SCXI-1328



Isothermal, high-accuracy design for thermocouples

SCXI-1338



Current input, 249

Ω resistor across each input

SCXI-1121

SCXI-1320



–

SCXI-1321



Offset nulling and shunt calibration for strain gages

SCXI-1327



SCXI-1328



Isothermal, high-accuracy design for thermocouples

SCXI-1305

–

BNC connectors, AC/DC coupling and signal ground referencing

SCXI-1122

SCXI-1322



–

SCXI-1124

SCXI-1325

–

–

SCXI-1127

SCXI-1331



–

SCXI-1128

SCXI-1332

–

Set up an 8 column by 4 row matrix

SCXI-1129

SCXI-1333

–

Configures SCXI-1129 as quad, 4 x 16 (2-wire) matrix

SCXI-1334

–

Configures SCXI-1129 as 4 x 64 (2-wire) matrix

SCXI-1335

–

Configures SCXI-1129 as 8 x 32 (2-wire) matrix

SCXI-1336

–

Configures SCXI-1129 as 16 x 16 (2-wire) matrix

SCXI-1337

–

Configures SCXI-1129 as a dual 8 x 16 (2-wire) matrix

SCXI-1339

–

Configures SCXI-1129 as a dual 4 x 32 (2-wire) matrix

SCXI-1140

SCXI-1301

–

–

SCXI-1304

–

AC/DC coupling and signal ground referencing (configurable per channel)

SCXI-1305

–

BNC connectors, AC/DC coupling and signal ground referencing

SCXI-1141

SCXI-1304

–

AC/DC coupling and signal ground referencing (configurable per channel)

SCXI-1142

SCXI-1305

–

BNC connectors, AC/DC coupling and signal ground referencing

SCXI-1143

SCXI-1301

–

–

SCXI-1160

SCXI-1324

–

–

SCXI-1161

–

–

Screw terminals located in module

SCXI-1162/HV

SCXI-1326

–

–

SCXI-1163/R

–

–

–

SCXI-1180

SCXI-1302

–

50-pin terminal block

SCXI-1181

SCXI-1300



–

SCXI-1181K

SCXI-1301

–

–

SCXI-1503

SCXI-1306



–

SCXI-1520

SCXI-1314

–

Quarter-bridge completion/shunt resistor

SCXI-1540

SCXI-1315

–

–

SCXI-1581

SCXI-1300

–

–

1

Table 3. SCXI-13xx, TC, and BNC Selection Guide

Table 4. Custom Cabling Accessories

Terminal Block

Width Required (TBX-RM1 Rack-Mount)

TBX-1303

One-half

TBX-1325, TBX-1326, TBX-1328, TBX-1329, TBX-24F, CB-50

One-third

Module

Connector and Shell Assembly

SCXI-1100, SCXI-1102B/C, SCXI-1140, SCXI-1141, SCXI-1181

SCXI-1310

SCXI-1120, SCXI-1120D, SCXI-1121, SCXI-1126, SCXI-1181

SCXI-1330

Table 2. Rack-Mount Widths of TBX Terminal Blocks