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February 2003
3
71207A
-01
TBX-1328 High-Accuracy Isothermal
Terminal Block Installation Guide
This guide describes how to install and use the TBX-1328 high-accuracy
isothermal terminal block with the SCXI-1120/D, SCXI-1121, SCXI-1125,
or SCXI-1126 modules. Table 1 shows the signals you can use with each
module.
The TBX-1328 high-accuracy isothermal terminal block is a DIN-rail
mountable, shielded terminal block with screw terminals to connect to the
SCXI-1120/D, SCXI-1121, SCXI-1125, or SCXI-1126 front connector.
The TBX-1328 has a high-precision thermistor for precise cold-junction
compensation and isothermal copper planes that minimize the temperature
gradients across the screw terminals when you take thermocouple
measurements. The TBX-1328 mounts on most European standard
DIN EN mounting rails.
The terminal block has 24 screw terminals for easy signal connection. Eight
screw terminals connect to the SCXI chassis ground through the shield of
the SH32-32-A cable. With the SCXI-1120/D, SCXI-1125, or SCXI-1126,
the remaining eight pairs of screw terminals connect signals to the eight
Table 1.
SCXI Module and Signal Compatibility
Module
M
il
li
vol
ts/
V
ol
ts
M
e
d
iu
m
V
o
lt
age
(60
V
)
Hi
g
h
V
o
lt
a
g
e
(2
5
0
V
/1,
00
0
V
)
Cur
re
n
t (4
to 20
m
A
)
F
re
que
nc
y to V
o
lt
age
Th
er
mo
cou
p
le
RT
D
/T
h
e
rm
is
to
r
S
tra
in
Ga
u
g
e
F
o
rc
e
, L
o
a
d
,
T
o
rque
SCXI-1120
Yes
Yes
Yes
Yes
No
Yes
No
No
No
SCXI-1120D
Yes
Yes
Yes
Yes
No
No
No
No
No
SCXI-1121
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
SCXI-1125
Yes
Yes
Yes
Yes
No
Yes
No
No
No
SCXI-1126
Yes
Yes
Yes
Yes
Yes
No
No
No
No
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