DC3R Isolation Option Board User Guide Instruction Manual D2-3454
The information in this manual is subject to change without notice. Throughout this manual, the following notes are used to alert you to safety considerations: m ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. IMPORTANT: Identifies information that is critical for successful application and understanding of the product.
iii m ATTENTION: Starting and stopping with the inhibit terminal pins does not disconnect AC power in the stop position. A hardwired AC power disconnection switch must be mounted in close proximity to the operator’s start/stop controls. This is required, as the DC3 drive does not have an armature loop contactor. A single fault like a power device short may cause motor rotation when in the stop mode.
iv Contents Introduction 1 Specifications 2 Dimensions 3 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Isolation option board connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Installation 5 Input voltage select switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Speed adjust potentiometer connections . . . . . . . . . . . . . . . . . . . . . . . .7 Polarity reversal switch connections . . . . . . .
v Illustrations Figure 1. Isolation Option Board Dimensions . . . . . . . . . . . . . . . . . . . . . . . .3 Figure 2. Isolation Option Board Mounted on a Regenerative Drive . . . . . . .4 Figure 3. Isolation Option Board Connections . . . . . . . . . . . . . . . . . . . . . . . .5 Figure 4. Input Voltage Select Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Figure 5. Speed Adjust Potentiometer Connections . . . . . . . . . . . . . . . . . . .7 Figure 6.
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1 Introduction The isolation option board allows regenerative drives to accept a grounded or floating DC voltage or current signal. This manual contains specifications, installation procedures, connections, and calibration procedures for the isolation option board. Refer to your regenerative drive user’s manual for additional installation, operation, and troubleshooting procedures.
2 Specifications Power Requirements Line input Input Signal Ranges Voltage signal, narrow range Voltage signal, wide range Current signal Input Impedance Voltage signal Current signal, 1–5 mADC Current signal, 4–20 mADC Current signal, 10–50 mADC Output Voltage range, max Linearity Safety Certification 115VAC/230 VAC, 50/60 Hz, single phase –25 to +25 VDC –250 to +250 VDC 1–5 mADC, 4–20 mADC, 10–50 mADC >25K ohms 1K ohms 235 ohms 100 ohms –10 to +10 VDC 0.
3 Dimensions ALL DIMENSIONS IN INCHES [MILLIMETERS] Figure 1.
4 Dimensions Figure 2.
5 Installation m ATTENTION: Only qualified personnel familiar with the constuction and operation of this equipment and the hazards involved should install, adjust, operate, and/or service this equipment. Read and understand this instruction manual in its entirety before proceeding. Failure to observe this precaution could result in severe bodily injury and loss of life. ATTENTION: The user is responsible for conforming with all applicable local and national codes.
6 Installation Input voltage select switch m ATTENTION: Change slide switch settings only when the drive is disconnected from the AC line voltage. Make sure line voltage is set to its correct position. If the switch is improperly set to a lower voltage position, the motor will not run at full voltage and may cause transformer damage. If the switch is improperly set to a higher voltage position, the motor will overspeed, which may cause motor damage.
Installation Speed adjust potentiometer connections m ATTENTION: Because the reference potentiometer is connected through the regulator to the armature power circuit, its terminals are at line potential. Use a potentiometer that has a insulating shaft to insulate the operator knob from this power circuit and that is capable of withstanding Hi-pot tests at 2000 Volts DC for one minute. Failure to observe this precaution could result in severe bodily injury or loss of life.
8 Installation Polarity reversal switch connections To reverse the output voltage polarity without changing the input voltage (or current) polarity, connect POL REV to COM (terminal 11 to terminal 12). A single-pole, single-throw switch can be used as a polarity reversal switch (Figure 6). Close the switch to reverse polarity. Open the switch to return the output voltage back to its original polarity. An open collector PNP transistor may also be used to reverse the output voltage polarity (Figure 7).
Installation PNP TRANSISTOR Figure 7. Open Collector PNP Transistor Used as a Polarity Reversal Switch ADD 39K AND 10K OHM RESISTORS AS SHOWN 10K 39K C NPN TRANSISTOR B E Figure 8.
10 Calibration m ATTENTION: The following adjustments are made with power on. Exercise extreme caution as hazardous voltage exists. Failure to observe this precaution could result in severe bodily injury or loss of life. 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.
Calibration 11 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.
12 Calibration 7. Set the voltage input signal to Vimax. 8. Calculate the test point voltage, Vtp: (Vimax) (m) Vtp = 2 where Vomax – Vomin m = Vimax – Vimin 9. Adjust the SIGNAL INPUT ADJ trimmer potentiometer (P501) so that the voltage from COM to TP (terminal 7 to 10) is Vtp. 10. Adjust the MAX OUT trimmer potentiometer (P502) so that the voltage output signal is Vomax. 11. Repeat steps 4, 5, 6, 7, 9, and 10. Use the same voltage values that you previously calculated.
Calibration 13 Current input signal calibration The following minimum and maximum values should be known: Vomax - Maximum voltage output signal Vomin - Minimum voltage input signal Iimax - Maximum current input signal Iimin - Minimum current input signal Iimin and Iimax is the current applied through terminals 8 and 9 (COM and INPUT 1). Vomin and Vomax is the voltage applied across terminals 1 and 2 (OUT1 and OUT2).
14 Calibration (Iimax) (m) Vtp = 2 where Vomax - Vomin m= Iimax - Iimin 9. Adjust the SIGNAL INPUT ADJ trimmer potentiometer (P501) so that the voltage from COM to TP (terminal 7 to terminal 10) is Vtp. 10. Adjust the MAX OUT trimmer potentiometer (P502) so that the output voltage is Vomax. 11. Repeat steps 4, 5, 6, 7, 9, and 10. Use the same voltage and current values that you previously calculated.
15 Troubleshooting m ATTENTION: Dangerous voltages exist on the isolation option board and regenerative drive when it is powered. When possible, disconnect the AC line voltage from the isolation option board and regenerative drive while troubleshooting. Be alert. High voltages can cause serious or fatal injury. Before troubleshooting Perform the following steps before starting any procedure in this section: • Disconnect AC line voltage from the isolation option board adder board and regenerative drive.
16 Troubleshooting If there is no output 1. Measure the voltage output signal across terminals 1 and 2 (OUT1 and OUT2). If there is a DC voltage present and there is no DC motor output, then check the connections to the regenerative drive that it is connected to. 2. Check the voltage at terminals 3 and 4 (L1 and L2). If there is no voltage then check the connections to the regenerative drive that it is connected to. 3.
U.S. Drives Technical Support Tel: (1) 262.512.8176, Fax: (1) 262.512.2222, Email: support@drives.ra.rockwell.com, Online: www.ab.com/support/abdrives Publication D2-3454– December 1999 Copyright © 1999 Rockwell Automation, Inc. All Rights Reserved. Printed in USA.