SCXI Terminal Blocks
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
ni.com/calibration.
Terminal Block
TBX-1303
TBX-1325, TBX-1326, TBX-1328, TBX-1329, TBX-24F, CB-50
Module
SCXI-1100
SCXI-1102
SCXI-1102B
SCXI-1102C
SCXI-1104/C
SCXI-1120
SCXI-1120D
SCXI-1126
SCXI-1125
SCXI-1121
SCXI-1122
SCXI-1124
SCXI-1127
SCXI-1128
SCXI-1129
SCXI-1140
SCXI-1141
SCXI-1142
SCXI-1143
SCXI-1160
SCXI-1161
SCXI-1162/HV
SCXI-1163/R
SCXI-1180
SCXI-1181
SCXI-1181K
SCXI-1503
SCXI-1520
SCXI-1540
SCXI-1581
1
Cold-junction
Terminal Blocks
SCXI-1303
2
SCXI-1300
3
SCXI-1308
BNC-2095
TC-2095
SCXI-1300
SCXI-1305
SCXI-1320
SCXI-1327
SCXI-1328
SCXI-1338
SCXI-1304/5
SCXI-1313A
SCXI-1320
SCXI-1327
SCXI-1328
SCXI-1338
SCXI-1320
SCXI-1321
SCXI-1327
SCXI-1328
SCXI-1305
SCXI-1322
SCXI-1325
SCXI-1331
SCXI-1332
SCXI-1333
SCXI-1334
SCXI-1335
SCXI-1336
SCXI-1337
SCXI-1339
SCXI-1301
SCXI-1304
SCXI-1305
SCXI-1304
SCXI-1305
SCXI-1301
SCXI-1324
–
SCXI-1326
–
SCXI-1302
SCXI-1300
SCXI-1301
SCXI-1306
SCXI-1314
SCXI-1315
SCXI-1300
CJC
1
Sensor
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Other Terminal Block Functions
Isothermal, signal ground referencing, and open thermocouple detection
–
Current input, 249
Ω
resistor across each input
BNC connectors, signal ground referencing
Thermocouple plugs, signal ground referencing, isothermal
–
BNC connectors, AC/DC coupling and ground referencing
–
Extends signal input range to 300 V
rms
, switch configurable per channel
Isothermal, high-accuracy design for thermocouples
Current input, 249
Ω
resistor across each input
BNC connectors, AC/DC coupling and ground referencing
Extends signal input range to 150 V
rms
, programmable per channel
–
Extends signal input range to 300 V
rms
, switch configurable per channel
Isothermal, high-accuracy design for thermocouples
Current input, 249
Ω
resistor across each input
–
Offset nulling and shunt calibration for strain gages
Extends signal input range to 300 V
rms
, switch configurable per channel
Isothermal, high-accuracy design for thermocouples
BNC connectors, AC/DC coupling and signal ground referencing
–
–
–
Set up an 8 column by 4 row matrix
Configures SCXI-1129 as quad, 4 x 16 (2-wire) matrix
Configures SCXI-1129 as 4 x 64 (2-wire) matrix
Configures SCXI-1129 as 8 x 32 (2-wire) matrix
Configures SCXI-1129 as 16 x 16 (2-wire) matrix
Configures SCXI-1129 as a dual 8 x 16 (2-wire) matrix
Configures SCXI-1129 as a dual 4 x 32 (2-wire) matrix
–
AC/DC coupling and signal ground referencing (configurable per channel)
BNC connectors, AC/DC coupling and signal ground referencing
AC/DC coupling and signal ground referencing (configurable per channel)
BNC connectors, AC/DC coupling and signal ground referencing
–
–
Screw terminals located in module
–
–
50-pin terminal block
–
–
–
Quarter-bridge completion/shunt resistor
–
–
compensation (CJC) sensor for thermocouple measurements.
2
Recommended for thermocouples; includes isothermal design and high-precision
CJC sensor.
3
Recommended for RTDs when using both SCXI-1102 and SCXI-1581.
Table 3. SCXI-13xx, TC, and BNC Selection Guide
Width Required (TBX-RM1 Rack-Mount)
One-half
One-third
Module
SCXI-1100, SCXI-1102B/C, SCXI-1140, SCXI-1141, SCXI-1181
SCXI-1120, SCXI-1120D, SCXI-1121, SCXI-1126, SCXI-1181
Connector and Shell Assembly
SCXI-1310
SCXI-1330
Table 2. Rack-Mount Widths of TBX Terminal Blocks
Table 4. Custom Cabling Accessories
BUY ONLINE
at
ni.com
or
CALL 800 813 3693 (U.S.)
2
NI [ NATIONAL INSTRUMENTS CORPORATION ]
