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All of the information herein is the exclusive proprietary property of Maxcess International, and is disclosed with the
understanding that it will be retained in confidence and will neither be duplicated nor copied in whole or in part nor
be used for any purpose other than for which disclosed.
Copyright 2004, all rights reserved.
Periodically there will be updates to this manual. The latest version is available at
1-800-MAGPOWR (624-7697).
1.0
Introduction
The MAGPOWR Model DFC-90 is a complete solution for follower arm or dancer control applications. The DFC-90
provides a 90 vdc current regulated output to control electromagnetic clutches and brakes. The DFC-90 also
provides a small reverse current to minimize the drag torque of the clutch / brake.
The Model DFC-90 has four jumper selectable current ranges. Maximum outputs for the individual ranges are
0.125, 0.25, 0.5 and 1.0 adc. The appropriate range is determined by the current rating of the clutch or brake to be
controlled. For best torque control resolution, the lowest current range providing sufficient current for maximum
operating torque should be selected.
Connections are provided for an external 1 madc current meter. The meter display will indicate clutch / brake
output current as a percentage of the output range selected.
The control circuits are electrically isolated from the power circuits.
2.0
Installation
The DFC-90 is intended for installation on a vertical panel using a DIN 35 rail with the wiring terminals facing down.
Figure 1 shows the enclosure dimensions.
Wiring to and from the DFC-90 must be done with double or reinforced insulation or protective screening which
provides protective separation. All wiring should comply with the essential requirements of the appropriate
standard(s) and is the responsibility of the installer.
Route control signal wiring away from AC wiring. Connect shields of shielded cable to the terminals indicated as
"SHIELD". Maximum shield length and maximum length of wires outside of the shield is 3 in. (75 mm).
1.39 [35.2mm]
850A265-1
10/04 Rev. D
INSTRUCTION MANUAL
MODEL DFC-90
DANCER-FOLLOWER ARM CONTROL 90 VDC
2.30 [58.4mm]
3.38 [85.9mm]
Enclosure Dimensions
222 W. Memorial Road, Oklahoma City, OK 73126-0508
Phone: 1-800-624-7697 Fax: 405-755-8425
www.magpowr.com E-mail: magpowr@magpowr.com
6.18 [157.0mm]
Figure 1
www.magpowr.com
or by calling
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Summary of Contents for Magpowr DFC-90
- Page 1 The control circuits are electrically isolated from the power circuits. Installation The DFC-90 is intended for installation on a vertical panel using a DIN 35 rail with the wiring terminals facing down. Figure 1 shows the enclosure dimensions. Wiring to and from the DFC-90 must be done with double or reinforced insulation or protective screening which provides protective separation.
-
Page 2: Maintenance
2). Set the JP1 current range selection jumpers to the range appropriate for the clutch / brake connected to the DFC-90 (See figure 3 for current range settings). The factory setting is 1/8 amp range. Replace the enclosure top. - Page 3 Install the DFP sensor so that its keyway is pointing towards the top cover when the follower arm is half way through its travel. DFP-2 To find the electrical center point of pot rotation, use a digital multimeter type ohm meter to measure from the white wire (wiper), to the red or black wire.
-
Page 4: Operation
7) Place the follower arm at the full roll position, and adjust the FULL pot to the desired output current at full roll. Setup is complete, and the DFC-90 is ready for operation. Optional adjustments: Stop Multiplier and Stop Time. The STOP MULT pot can be used to increase the torque while the machine is stopping. - Page 5 Dancer Applications Electrical Connections Figure 7 shows the connections that are required for the basic dancer system. They are: 115vac power input 90 vdc output for clutch / brake DFP or DFP-2 dancer position sensor Install jumper between terminals 20 and 21. The clutch / brake output and the remote meter output are not isolated from the AC line and must not be referenced to ground.
- Page 6 Stop Time expires. Stop Time may be increased by Clockwise rotation of the STOP TIME pot. The STOPPED indicator lights when the Stop Time expires. While the STOPPED indicator is lit the DFC-90 provides a hold level current to the clutch / brake. This hold level may be adjusted by turning the HOLD pot.
- Page 7 Optional Dancer Optimization After tuning of the dancer, the following method will usually optimize the stability and responsiveness of the dancer. The method begins by placing the dancer in PD mode with a roll diameter near core and reducing the gain to a level which the user may consider unacceptable. Gain will subsequently be increased to a more desirable level.
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Page 8: Troubleshooting
Follower Arm/ Dancer Options The DFC-90 is factory adjusted to provide full reverse current with 0 vdc input. If some other current is desired with 0 vdc input, the minimum current potentiometer may be adjusted by cutting out the hole shown on the label and then using a trimpot adjustment tool. - Page 9 Clutch / Brake wires open Disconnect clutch / brake wires at the circuit. DFC-90 and check for proper clutch / brake resistance between the wires. Jumper not installed Install jumper between terminals 20 between 20 and 21.
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Page 10: Specifications
10.0 Specifications Supply Voltage: 115vac, +/- 10%, 50/60 Hz, 1.1 amp maximum, sinusoidal Fuses: F1, F2 1.6 amp, Littelfuse Part No. 21601.6, or Wickmann Part No. 19194-053-FS Enclosure: IP20 Climatic Class: 3K3 (EN60721) Temperature Range: Operating: 0° C to 50° C Storage: -30°...