Rockwell Automation T7480 ICS Regent+Plus Guarded Analog Output Modules - Manual (Page 19)

Guarded Analog Output Modules (T7480)
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4. Connect the six precision resistors to the I/O extender
jumper posts as shown in Figure 11. Use test clips as
required to make the connections.
5. Remove the four screws on one side of the module and
remove the printed circuit board from the module
clamshell housing.
6. Install the printed circuit board into the I/O extender
module. Allow the board to warm up for approximately one
minute.
7. Connect the voltmeter's negative probe to test point TP4.
Measure the voltage at TP1. The voltage should be
10.0000 VDC (±0.0003 VDC). Use R22 to adjust the
voltage.
8. Connect the voltmeter’s negative probe to TP4. Measure
the voltage at TP2. The voltage should be 8.0000 VDC
(±0.0002 VDC). Use R17 to adjust the voltage.
9. Connect the voltmeter negative probe to TP4. Measure
the voltage at TP3. The voltage should be 2.0000 VDC
(±0.0001 VDC). Use R19 to adjust the voltage.
10. Using the forcing functions of W INTERPRET , force all of the
six analog outputs to zero. Refer to the Regent User’s
Guide for more details about the forcing functions. Wait
approximately one minute after forcing the outputs to
allow them to stabilize.
11. Adjust each of the six Offset potentiometers until the
voltage measured across the corresponding precision
resistor is +1.0000 V (± 0.0002 V). Connect the voltmeter
across the resistor leads to measure the voltage.
12. Force all six of the outputs to 4095. Wait approximately
one minute after forcing the outputs to allow them to
stabilize.
13. Adjust each of the six Gain potentiometers until the
voltage measured across the corresponding precision
resistor is +4.9990 V (± 0.0002 V).
After completing one iteration of the calibration, repeat the
offset and gain adjustments (steps 10 through 13) until the
readings are within specifications. It is necessary to repeat