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October 2002
321674C-01
TC-2190 A
DAPTER
WITH
T
HERMOCOUPLE
M
INICONNECTORS
I
NSTALLATION
G
UIDE
This installation guide describes how to install and connect thermocouples
and digital I/O signals to the TC-2190 adapter with thermocouple
miniconnectors to use with the NI USB-4350, NI PXI-4351, and
NI PCI-4351 data acquisition (DAQ) devices.
Introduction
The TC-2190 adapter consists of a shielded box with 14 miniconnectors
that you can use to connect the thermocouples to the NI 435
X
for USB,
PXI, and PCI. This adapter has two 68-pin connectors—one on the front
and one on the rear. You can use either of the two connectors to connect the
TC-2190 to the NI 435
X
using an SH6868 shielded cable (recommended)
or an R6868 ribbon cable. You can also access the eight digital I/O lines
and the digital ground of the NI 435
X
using the spring terminal blocks.
This adapter is designed specifically for ease of use with thermocouples.
It features isothermal construction to minimize the temperature gradients
across the thermocouple junctions and a high-accuracy thermistor
cold-junction temperature sensor.
The TC-2190 connects to all the digital I/O lines on the NI 435
X
and all but
two analog input channels (CH)—CH0 is dedicated to the cold-junction
sensor and CH1 is dedicated to auto-zeroing circuitry. Refer to the
NI 435X User Manual
for further details on the cold-junction sensor and
auto-zeroing circuitry.
Conventions
The following conventions are used in this guide:
»
The
»
symbol leads you through nested menu items and dialog box options
to a final action. The sequence
File»Page Setup»Options
directs you to
pull down the
File
menu, select the
Page Setup
item, and select
Options
from the last dialog box.
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