Rockwell Automation 1771-OFE/B Analog Output Module User Manual - Manual (Page 62)

MAX
6-10
Publication 1771Ć6.5.30 - November1998
2. Attach 250 ohm resistor across Channel 1 (the top two screws) on
the field wiring arm.
Figure 6.7
Resistor Placement on Field Wiring Arm
A
0
1
2
3
4
5
6
7
8
Channel 1
Channel 2
Channel 3
Channel 4
250 ohm
resistors
12991
Field Wiring Arm
3. Attach three more 250 ohm resistors across Channels 2, 3, and 4
(Figure 6.7).
4. Place the LAST STATE configuration jumpers in the MAX
position (if they are not there already).
5. Connect a voltmeter across the top two screws on the field wiring
arm (top screw is positive, and second screw is negative).
6. Turn processor, I/O chassis, and industrial terminal ON.
7. Place processor in the TEST or PROG mode.
8. Output full scale (+50mA) with write block transfer data.
9. Adjust R66 (Figure 6.6) until the reading is +12.5V (50mA)
+5mV.
10.Repeat steps 8 and 9 for channels 2, 3 and 4. Adjust as necessary
until the desired tolerance is obtained. Associated resistor
potentiometers are shown in Table 6.D.