Rockwell Automation T7470A ICS Regent+Plus Analog Output Modules - Manual (Page 14)

Analog Output Modules (T7470A)
1 4
Industrial Control Services
2. Install the I/O extender module into the slot from which
the module was removed.
3. Remove the jumpers (if installed) labeled CH1 through
CH16 from the I/O extender module.
4. Connect the eight precision resistors to the I/O extender
jumper posts as shown in Figure 9. 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. Using the forcing functions of W INTERPRET , force all of the
eight 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.
8. Adjust the eight Offset potentiometers to read +1.0000 V
(± 0.0002 V) across each of the precision resistors. Connect
the voltmeter across the resistor leads to measure the
voltage.
9. Force all eight of the outputs to 4095. Wait approximately
one minute after forcing the outputs to allow them to
stabilize.
10. Adjust the eight Gain potentiometers to read +4.9990 V
(± 0.0002 V) across each of the precision resistors.
11. Repeat steps 7 through 10 and readjust the Offset and
Gain potentiometers if necessary until the Offset and Gain
voltages are within the stated limits.
12. Force all eight of the outputs to 2048. Wait approximately
one minute after forcing the outputs to allow them to
stabilize.
13. Verify that the output voltages read +3.0000 V (± 0.0020
V) across each of the precision resistors. If the Offset and
Gain adjustments are within the limits stated in steps 8
and 10 above, but this midvalue point is not, return the