Magpowr PS-24 User manual

222 W.Memorial Road, Oklahoma City, OK73114-2317
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INSTRUCTION MANUAL
MODEL PS-24
24 VDC POWER SUPPLY
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 www.magpowr.com or by calling
1-800-MAGPOWR (624-7697).
1.0 Introduction
The MAGPOWR Model PS-24 is a controllable current regulator for 24 vdc magnetic particle clutches and brakes.
The PS-24 also provides a small amount of reverse current to maximize the torque range of the clutch / brake.
The PS-24 may be powered from either 24 vac or 24 vdc.
The Model PS-24 has three jumper selectable current ranges. Maximum outputs for the individual ranges are 0.5,
1.0 and 2.0 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. When using 24 vdc input power the maximum current output will be slightly less than
the selected range.
The PS-24 accepts either a remote adjustment potentiometer, or a 0 to 10 vdc analog control signal. An isolation
card is required when the PS-24 is connected to an external non-isolated 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 not electrically isolated from the power circuits. The control circuit negative is connected to
the P.E. connection, i.e., control input circuits are not floating.
2.0 Installation
The PS-24 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.
Wiring to and from the PS-24 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.
850A302-1
06/05 REV. B

2
J1
J2
Route input power away from control signal wiring. Connect shields of shielded cable to the terminals indicated as
“SHIELD”. Maximum exposed shield length and maximum length of wires outside of the shield is 3 in. (75 mm).
Figure 1
Enclosure Dimensions
3.0 Setup
Remove the enclosure top by inserting a flat blade screwdriver under the retaining tabs in the base (See figure 2).
Set the J1 input voltage selection jumper to either AC or DC depending on input voltage type. Set the current
range selection jumpers to the range appropriate for the clutch / brake connected to the PS-24 (See figure 3 for J2
current range settings). The factory setting is 1/2 amp range. Replace the enclosure top.
Figure 2 Figure 3
Enclosure Top Removal J2 Current Range Settings
6.18 [157.0 mm]2.30 [58.4 mm]
1.39 [35.2 mm] 3.38 [85.9 mm] MODEL: CLUTCH-BRAKE POWER SUPPLY
PS-24
Company
International
A Maxcess

3
ONLY
1 32
24 VDC
REMOTE POTENTIOMETER
1K TO 10K
L1
OUTPUT METER
L2 +-
24V 1mA
POTENTIOMETER
or 0-10V INPUT
SHIELD +-
1234567 23
AC/DC
24V
CW
-+
24 25 26
ALLOWED IN
(OPTIONAL)
CLUTCH/
BRAKE
METER
REMOTE
0-1 mA DC
D.C. OUTPUT
24 VAC, 50/60 Hz
or
SWITCH NOT
24 VDC
ISOLATED
4.0 Electrical Connections
Figure 4 shows the connections that are required for the basic system. They are:
24 vac/vdc power
24 vdc output for clutch / brake
1 to 10 kohm Potentiometer
Route input 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 in. (75 mm).
When using a 0 to10 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 0 to 10 vdc signal should be isolated from PE. If not isolated from PE,
EMC performance may be degraded.
The 0 to 1 madc output and the potentiometer input negative lead is ground referenced.
The 24 vdc output must be floating with respect to ground.
When using multiple PS-24's, each one must have its own power supply.
Figure 4
Electrical Connections for PS-24
5.0 Maintenance
The only maintenance that may be required on the PS-24 is fuse replacement. Replacement of the fuse(s) requires
first removing input power, then opening the enclosure. The enclosure must be re-installed to maintain the IP
rating. The enclosure may be opened by inserting a flat blade screwdriver under the retaining tabs in the base
(See figure 2).
Alternate wiring for non-isolated
24 vdc supply. EMC performance
may be degraded. Do not use with
AC supply.

4
6.0 Troubleshooting
Symptom Possible Cause Solution or Diagnostic
No input power. Verify incoming power is correct
voltage and frequency.
J1 selection wrong. Verify J1 is set to AC or DC to match
the type of power input.
Fuses blown. Clutch / brake wires shorted together
or shorted to ground.
Clutch / brake wires open
circuit.
Disconnect clutch / brake wires at the
PS-24 and check for proper
clutch / brake resistance between the
wires.
No clutch / brake
output.
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.
Incorrect type of meter. Meter should be a current meter with
1 madc full scale and no more than
100 ohm resistance.
Remote meter not
working.
Meter wires shorted or open. Disconnect meter wiring at the PS-24
and check for proper meter resistance
between the wires.

7.0 Specifications
Supply Voltage: 24 vdc, 2.1 amp maximum, 49 va with clutch or brake coil
24 vac, +/- 10%, 50/60 Hz, 2.1 amp maximum, sinusoidal,
49 va with clutch or brake coil
Fuses: F1 2.5 amp, Littelfuse Part No. 21602.5, or
Wickmann Part No. 19194-058-FS
F2 5.0 amp, Littlefuse Part No. 216005, or
Wickmann Part No. 19194-063-FS
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
Device Types: A or B (IEC755)
Worst Case Fault Current: 2.5 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: -1.2 to 24 vdc, duty cycle/phase controlled
Current: Adjustable in three ranges:
-0.016 to 0.5 adc
-0.032 to 1.0 adc
-0.064 to 2.0 adc
Regulation: < 1% of range
Current Drift: 0.024 %/° C
Meter Signal: 0 to 1 madc, +/-3% into 100 ohm maximum
Potentiometer Supply Voltage: 10 vdc +/-3%, 10 madc maximum