OVERVIEW
I-E96-403A
1 - 1
SECTION 1 - INTRODUCTION
OVERVIEW
One Thermocouple Input Termination Unit (NTAI02) can con-
nect one or two Thermocouple Slave Modules (IMASM02)
through separate cables. Each NTAI02 can input 16 thermo-
couple or millivolt signals from field equipment to the thermo-
couple input slave modules. These signals pass through the
slave module to the Analog Master Module (IMAMM03). Up to
four NTAI02s can be interconnected together allowing the
IMAMM03 to monitor local cold junction reference signals and
route internal calibration voltages to eight IMASM02s. This
manual explains the purpose, setup, handling precautions and
steps to install the NTAI02 unit.
INTENDED USER
System engineers and technicians should read this manual
before installing and using the termination unit (TU). Put the
unit into operation only after reading and understanding this
instruction. Refer to the
Table of Contents
to find the infor-
mation. Refer to the
entry in this
section to get started.
TERMINATION UNIT DESCRIPTION
The NTAI02 is a single printed circuit board that mounts in a
Field Termination Panel (NFTP01). It has five connectors that
are used for communication to the IMAMM03 master,
IMASM02 slave, and other NTAI02 slave termination units. The
internal and external test points and the calibration select
switch are used for calibration. Cold junction reference RTDs
for thermocouple inputs and terminal blocks for field wiring
are also on the TU. Figure
shows an application example
for the NTAI02.
FEATURES
The design of the NTAI02, as with all INFI 90 devices, allows for
flexibility in creating a process management system. Refer to
the
entry of this section for the list of devices
that can be used with the TU in an INFI 90 system.
•
A standard factory-wired cable connects the TU to the
IMASM02 slave module.
•
On-board terminal blocks accept field input wiring.
•
Each TU fits in a standard field termination panel.
•
Field wire termination for 16 thermocouple and millivolt
inputs.
