Bailey infi 90 IMASI03, Instruction

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INTRODUCTION
I-E96-301B B - 1
APPENDIX B - NTAI06
TERMINATION UNIT CONFIGURATION
INTRODUCTION
The Universal Analog Slave Input Module (IMASI03) uses one
NTAI06 Termination Unit for termination. Jumpers on the
NTAI06 configure each of the 16 analog inputs for either sys-
tem powered 4-20 mA, external powered 4-20 mA, 3-wire RTD,
differential or single ended voltage.
IMASI03 termination units with both revision A and revision B
hardware are in service. This section contains information on
revision A and B units (see Figure B-1).
Cold Junction Reference Input
Each NTAI06 termination unit has a pair of RTDs which mea-
sure the temperature of the termination unit. This temperature
is used to compensate for the cold junction effect on thermo-
couple inputs.
When using the built-in cold junction reference, the termina-
tion unit covers should be in place. The cover encloses both the
terminal blocks and the RTD. It helps maintain the same tem-
perature around the terminal blocks and the RTD. Maintaining
both at the same temperature allows maximum accuracy for
thermocouple inputs.
To apply the built-in cold junction reference for thermocouple
inputs, refer to function code 215 specifications and block out-
puts in
Appendix C .
Configuring Inputs
Jumpers on the termination unit configure the 16 analog
inputs. Table
B-1 lists the inputs that the NTAI06 accepts.
Table B-2 lists the jumper configurations for the NTAI06. Table
B-3 describes the NTAI06 input types.