Maxcess MAGPOWR PS90 User manual

PS90
90 VDC Power Supply
Instruction Manual
www.maxcessintl.com
PS90
MI 850A264 1 F
Page 1 of 4
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 2011, 2018 all rights reserved.
Periodically there will be updates to this manual. The latest version is available on our website or by calling your
regional office listed on the back page of this publication.
INTRODUCTION
The MAGPOWR Model PS90 is an isolated controllable current regulator for 90 VDC magnetic
particle clutches and brakes. The PS90 also provides a small amount of reverse current to minimize
the drag torque of the clutch / brake.
The Model PS90 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.
The PS90 accepts either a remote adjustment potentiometer, or a 0 to 10 VDC analog control signal.
Connections are provided for an external 1 mADC current meter. The meter display will indicate
output current as a percentage of the output range selected.
The control circuits are electrically isolated from the power circuits.
INSTALLATION
The PS90 is intended for installation on a vertical panel with a DIN 35 rail, with the wiring terminals
facing down. Figure 1 shows the enclosure dimensions.
Figure 1. Enclosure Dimensions
6.18 [157.0 mm]2.30 [58.4 mm]
1.39 [35.2 mm] 3.38 [85.9 mm]

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PS90
MI 850A264 1 F
Page 2 of 4
SETUP
Remove the enclosure top by inserting a flat blade screwdriver under the retaining tabs in the
base (See Figure 2). Set the JP1 current range selection jumpers to the range appropriate for
the clutch / brake connected to the PS90 (See Figure 3 for current range settings). The factory
setting is 1/8 amp range. Replace the enclosure top.
Figure 2.
Removing Enclosure Top
Figure 3.
JP1 Current Range Settings
ELECTRICAL CONNECTIONS
Wiring to and from the PS90 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 AC power away from control wiring. The clutch / brake wires and the remote meter wires
should be twisted pair. Run the signal input wiring in shielded cable. Connect the shield to the
provided terminal marked SHIELD. The maximum shield length and maximum length of wires
outside of the shield is 3.0 inches. (75 mm).
When using a 0 to 10 VDC input instead of a potentiometer, connect the negative of the input to
terminal 26 and the positive of the input to terminal 25.
The 90 VDC output and the remote meter output are not isolated from the AC line and must not
be ground referenced. The potentiometer input is isolated and may be ground referenced.
Required connections:
115 VAC power
90 VDC output for clutch/brake
1 to 10 kohm Potentiometer
Figure 4. Wiring Connections
7 1
JP1
REMOTE POTENTIOMETER
1K TO 10K
L1 OUTPUT METER L2 + -
90V 1mA
POTENTIOMETER
or 0-10V INPUT
SHIELD +-
1 2 3 4 5 6 7 23
VAC
115
CW
-+ 24 25 26
ALLOWED IN
(OPTIONAL)
CLUTCH/
BRAKE
METER
REMOTE
0-1 mA DC
D.C. OUTPUT
115 VAC
50/60 Hz
SWITCH NOT

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PS90
MI 850A264 1 F
Page 3 of 4
MAINTENANCE
The only maintenance that may be required on the TSA is fuse replacement. See specifications
on next page.
Remove AC power, and then open the enclosure by inserting a flat blade screwdriver under the
retaining tabs in the base (See Figure 2 on previous page). Replace fuse and reassemble.
The enclosure must be re-installed to maintain the IP rating.
TROUBLESHOOTING
Symptom
Possible Cause
Solution or Diagnostic
No clutch / brake
output.
No AC power.
Verify incoming power is correct
voltage and frequency.
Fuses blown.
Clutch / brake wires shorted together
or shorted to ground.
Clutch / brake wires open
circuit.
Disconnect clutch / brake wires at the
PS90 and check for proper
clutch / brake resistance between the
wires.
Remote potentiometer or
external power supply not
wired correctly, or shorted
together.
Voltage between terminal 24 and 26
should be 10 VDC.
Voltage between terminal 25 and 26
should vary from 0 to 10 VDC as the
potentiometer or external 0 to10 VDC
power supply is moved through its
range of travel.
Remote meter not
working.
Incorrect type of meter.
Meter should be a current meter with 1
mA full scale and no more than 3
kohm resistance.
Meter wires shorted or open.
Disconnect meter wiring at the PS90
and check for proper meter resistance
between the wires.
OPTIONS
The PS90 is factory adjusted to provide full reverse current with 0 VDC input. If some other
current is desired with 0 VDC input or the minimum remote potentiometer setting, the minimum
current potentiometer may be adjusted by cutting out the hole shown on the label and then
using a trimpot adjustment tool. Modifying this setting will cause the clutch / brake drag torque to
be higher than expected and is not recommended.

SPECIFICATIONS
Supply Voltage: 115 VAC, +/- 10%, 50/60 Hz, 1.1 amp maximum, sinusoidal
Fuses: F1, F2 1.6 amp slow-blow, Littelfuse Part No. 21501.6, or
Cooper-Bussman Part No. S505-1.6-R
Enclosure: IP20
Climatic Class: 3K3 (EN60721)
Temperature Range:
Operating: 0° C to 50° C
Storage: -30° C to 80° C
Relative Humidity: 5% to 85%
Pollution Degree: 2 (IEC664-1)
Altitude: 0 to 2000 m
Compatible Residual Current A or B (IEC755)
Device Types:
Worst Case Fault Current: 1.6 amp
Inputs:
Signal Potentiometer: 1 to 10 kohm, ¼ watt minimum, or
Voltage: 0 to 10 VDC, 100 kohm input impedance
Outputs:
Clutch / Brake
Voltage: -3 to 90 VDC, full wave, phase controlled
Current: Adjustable in four ranges:
-0.004 to 0.125 ADC
-0.008 to 0.25 ADC
-0.016 to 0.5 ADC
-0.032 to 1.0 ADC
Regulation: < 1% of range
Current Drift: 0.024 %/° C
Meter Signal: 0 to 1 mADC, +/-2% into 3 kohm maximum
Potentiometer Supply Voltage: 10 VDC +/-2%, 10 mADC maximum
SERVICE REQUESTS AND REPLACEMENT PARTS
To request service or to get replacement parts, contact one of the following addresses:
Fife Corporation
222 West Memorial Rd.
Oklahoma City, OK, 73114, USA
Phone: [phone]
Fax: [phone]
Web: www.maxcessintl.com
Fife-Tidland GmbH
Fife-Tidland GmbH
Max-Planck-Strasse 8 OR
65779 Kelkheim
Deutschland
Telefon: [phone]
Fax: [phone]
Web: www.maxcess.eu
Siemensstrasse 13-15
48683 Ahaus
Deutschland
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