NIAI05 TERMINATION MODULE CONFIGURATION
INTRODUCTION
I-E96-301B
A - 3
Table A-3. NIAI05 Input Type Descriptions
Input Type
Input Description
Single Ended Volt-
age
This jumper configuration connects the minus
(-) input terminal to I/O COM on the NIAI05. The
IMASI03 measures the voltage at the plus (+) input
terminal with respect to the I/O COM terminal. No
connection to the C terminal is necessary.
Differential Voltage
This jumper configuration connects the plus (+) and
minus (-) inputs directly to IMASI03 differential input.
Channel to channel and channel to system signal
isolation is achieved for all voltage input types,
including high level voltage, millivolts and
thermocouples. No connection to the C terminal is
necessary.
System Powered
4-20 mA
This jumper configuration connects the plus (+) input
terminal to 24 VDC through a current
limiting resistor on NIAI05 modules with revision A
hardware (revision B hardware replaces the resistor
with a fuse). The minus (-) input terminal connects to
a precision resistor that generates a single ended
voltage (1 to 5 V) for the IMASI03 to measure. No
connection to the C terminal is necessary. The INFI
90 system must have +24 volts (system power)
installed.
External Powered
4-20 mA
This jumper configuration connects the plus (+) input
terminal to one end of a precision resistor and the
minus (-) input to the other end of the same precision
resistor in the NIAI05. An isolated 1 to 5 Volts is
generated for the IMASI03 to measure. No
connection to the C terminal is necessary.
3-Wire Resistance
This jumper configuration connects the plus (+) and
minus (-) inputs and the C input directly to IMASI03
three-wire input. Channel to channel and channel to
system signal isolation is maintained. The two
common leads of the RTD element should be
connected across the plus (+) and common (C)
terminals, and the third lead should be connected to
the minus (-) terminal.
