Rockwell-automation T3420AF ICS Regent Analog Input Modules Manual de usuario descargar pdf (Pagina 34)

Analog Input Modules

(T3420A, AF)

Industrial Control Services

Connect the DC voltage signal source to the I/O extender

jumper posts as shown in Figures

. Use test clips

as required to make the connections.

Remove the four screws on one side of the module and

remove the printed circuit board from the module

clamshell housing.

Install the printed circuit board into the I/O extender

module. Allow the board to warm up f

or approximately one

minute.

Adjust the DC voltage source to the Offset Input Voltage

value indicated in Table

for the configured input range

of the input module. Wait approximately one minute for

the analog inputs to stabilize.

Using the monitoring functions of

INTERPRET

, monitor

the values of all the analog input channels. Refer to the

Regent User’s Guide for more details about the monitoring

functions.

Adjust the Offset potentiometer (R569) for an average

reading

of 2 ±1 for all input channels. Verify that all input

channels read between 1 and 3. If one or more channels

reads significantly different, return the module to ICS for

repair.

10.

Adjust the DC voltage source to the Gain Input Voltage

value indicated in Table

for the configured input range

of the input module. Wait approximately one minute for

the analog inputs to stabilize.

11.

Adjust the Gain potentiometer for a reading of 4093 ±1 for

all channels. Verify that all input cha

nnels read between

4092 and 4094. If one or more channels reads significantly

different, return the module to ICS for repair.

12.

Repeat steps 7 through 11 and make adjustments if

necessary until both the Offset and Gain values read

correctly. There is some interaction between the Offset and

Gain adjustments so often you will need to repeat these

steps a few times until both the Offset and Gain readings

read correctly without further adjustments.

13.

Calibration is complete. Unplug the printed circuit boa

from the I/O extender module and replace it in its

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Rockwell-automation T3420AF ICS Regent Analog Input Modules Manual de usuario Pagina 34

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