WOODWARD 9904-149 Applied to Hydraulic Governor

WOODWARD 9904-149 Applied to Hydraulic Governor

Configuring Inputs Jumpers on the termination unit configure the 16 analog inputs. Table A-1 lists the inputs that the NTAI06 unit accepts. Table A-2 lists the jumper configurations for the NTAI06 unit. Table A-3 describes the NTAI06 input types.Figure A-1 shows the jumper locations and terminal assignments for revision A hardware. Check jumpers before installing the NTAI06. Figure A-2 shows the jumper locations and terminal assignments for revision B hardware. Check jumpers before installing the NTAI06. Figure A-3 shows a typical input circuit and the jumpers used for each input. Figure A-4 shows field input termination examples for revision A and B hardware. Figure A-5 shows IMASI03 input examples.

Input Description 

Single-ended voltage This jumper configuration connects the minus (-) input terminal to I/O COM on the NTAI06. The IMASI13 measures the voltage at the plus (+) input terminal with respect to the C terminal. No connection to the C terminal is necessary. Differential voltage This jumper configuration connects the plus (+) and minus (-) inputs directly to IMASI13 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 system +24 VDC through a fuse on the NTAI06. The minus (-) input terminal connects to a precision resistor on the IMASI13 module that generates a single-ended voltage (0.4 to 2 V) to measure. The 250 ohm resistor in the NTAI06 TU is not used. No connection to the C terminal is necessary. INFI 90 OPEN 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 located on the IMASI13 module. The 250 ohm resistor on the NTAI06 TU is not used. An isolated 0.4 to 2 Volts is generated for the IMASI13 to measure. No connection to the C terminal is necessary