Rockwell Automation DC3R Isolation Option Board - Manual (Page 17)

Use a voltmeter for voltage measurements.
1. Switch all three of the SW501 DIP switches OFF as shown in
Figure 9 (page 12).
2. Connect the signal input as follows:
a. Connect signal common (–) to COM (terminal 7).
b. For 0 ± 25 VDC input signal, connect the signal
positive (+) to INPUT 1 (terminal 8); for 0 ± 250 VDC input signal,
connect the signal positive to INPUT 2 (terminal 9).
3. Adjust the regenerative drive’s MIN SPD trimpot full CCW and the MAX SPD
trimpot full CW.
4. Apply AC line voltage and voltage input signal.
5. Set the voltage input signal to Vimin.
6. Adjust the MIN OUT trimmer potentiometer (P503) so that the output voltage is
Vomin.
11 Calibration
Voltage input signal calibration
The following maximum and minimum voltages should be known:
Vimin – Minimum voltage input signal.
Vomin – Minimum voltage output signal.
Vimax – Maximum voltage input signal.
Vomax – Maximum voltage output signal.
Vimin and Vimax is the voltage applied across terminals
7 and 8 (COM and INPUT 1) if the voltage input signal range is
0 – ±25 VDC, or across terminals 7 and 9 (COM and INPUT 2)
if the voltage input signal range is 0 – ±250 VDC. Vomin and Vomax is the
voltage across terminals 1 and 2 (OUT1 AND OUT2).
Calibration procedure
ATTENTION: The control circuit is at line potential when the drive is
energized. Use a non-metallic screwdriver when making adjustments to the
circuit board potentiometers. Exercise extreme caution as hazardous voltage
exists. Failure to observe these precautions could result in severe bodily injury
of loss of life.
ATTENTION: The DC3 drive is intended to operate at a predetermined
minimum speed. If the application requires zero speed operation, the user is
responsible for assuring safe conditions for operating personnel by providing
suitable guards, audio or visual alarms, or other devices. Failure to observe
these precautions could result in bodily injury.
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