Magtrol 5210-2 User manual

1
1.0 INTRODUCTION
The Model 5210-2 is a current-regulated power supply and display that is designed for use with
Magtrol’s Dial Weight Dynamometers. With regulated current, torque drift caused by temperature
changes within the brake coil is eliminated.
The 5210 is a solid-state control that provides smooth application of current from zero to maximum.
Braking power can be controlled manually from either the 10-turn potentiometer and adjustment
knob on the front panel, or externally from the 0–5 VDC input when remote operation is desired.
An LCD readout conveniently displays the applied braking current.
Note: Magtrol offers three different models of the 5210 Power Supply,
each with a different maximum voltage output. The 5210-1 is 90
volts, 5210-2 is 24 volts, and the 5210-3 is 12 volts. All Magtrol
Dial Weight Dynamometers are designed with a 24 volt coil.
Therefore, the 5210-2 is the only power supply that should be used
with a dial weight dynamometer. The 5210-1 and 5210-3 are for
use with Magtrol brakes and clutches only.
1.1 SpecificationS
Brake Voltage 0 to 24 V DC
CURRENT RANGES:
Low Scale
Medium Scale
High Scale
0 to 200 mA
0 to 500 mA
0 to 1000 mA
Current Regulation ± 1% Full Scale
Braking Control 10-turn potentiometer (internal) or
0–5 V DC input (external)
Brake Fuse (5 × 20 mm) UL/CSA 1.25 A 250V SB
IEC 1.00 A 250V T
Line Fuse (5 × 20 mm) 120 V: UL/CSA 1.0 A 250V SB
240 V: IEC 0.4 A 250V T
Power Requirements 100 VA
Voltage Requirements 120/240 V AC 50/60 Hz
Model 5210-2 Power Supply

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Magtrol Model 5210-2 Power SupplyUser’s Manual
1.2 front and rear panel
1.3 circuit deScription
Functionally, the circuit is a closed loop, current feedback amplifier regulating the output current at
the value set by the front panel controls.
DC current from the internal 35 volt power supply passes through the dynamometer coil connected
at the BRAKE connector J6, through the insulated gate field effect transistor Q1 (HEXFET), and
through a current sense resistor R13, R14 or R15 (selected by the RANGE control). The voltage
drop across the current sense resistor is amplified by Operational Amplifier U1b and applied to the
non-inverting differential input of Operational Amplifier U1a. Amplifier U1a amplifies the difference
between the conditioned current signal from the sense resistor and the voltage from the front panel
current ADJUST potentiometer, R6. This amplified error voltage is applied to the gate of transistor
Q1 to control its channel resistance and thereby regulates the output current at the value set by the
ADJUST control.

3
Magtrol Model 5210-2 Power Supply User’s Manual
2.0 CONFIGURATION
2.1 input power
The 5210-2 is shipped set for 120 Vrms power. This can be verified by observing the location of the
round white tab in the fuse holder of the power line filter module that is located on the rear panel
- it should show through the 120 V hole.
2.1.1 Setting Line Power to 240 V
1. Remove the line cord.
2. Remove the fuse holder to access the inner module.
3. Remove the small circuit board with the white tab.
4. Rotate and reposition the white tab so that when the board and fuse holder are reinserted,
the round point of the white tab now inserts into the small round hole on the fuse holder
that is opposite the 240 V position.
Note: Of the four (4) voltage positions shown on the fuse holder, only
the 120 V and the 240 V positions are active. Selecting either the
100 V or the 220 V position will not apply line power to the power
supply. Therefore, use only the 120 V or 240 V positions.
2.2 external control input
An EXTERNAL CONTROL input is provided at the rear of the 5210-2 to adjust the dynamometer
current from an external 0 to + 5.0 VDC input. This input is scaled for 5.0 VDC and equals the full
scale output current of each current range (0.2, 0.5 and 1.0 amp).
When this connector is plugged in, the front panel ADJUST control is nonfunctional.
3.0 OPERATION
The 5210-2 is universal for all Magtrol Dial Weight Dynamometers. However, because of the wide
range of full scale current requirements; 0 to 0.164 amps (HD-106-1) to 0 to 0.700 amps (HD-705-1),
a three position current range control provides improved torque resolution control. The three settings,
HIGH, MED and LOW determine the full scale current level of the power supply. Full scale for
the HIGH, MED and LOW ranges are 1.0, 0.5 and 0.2 amps, respectively. The digital panel meter
indicates the current output level to within ± 1%.
Starting on the LOW current range, with the ADJUST knob set fully counter clockwise (zero
current), increase (INC) current until the desired torque is obtained. Select the next higher RANGE
as necessary to obtain this torque.

4
Magtrol Model 5210-2 Power SupplyUser’s Manual
1st Edition rev A – May 2010
www.magtrol.com
Testing, Measurement and Control of Torque-Speed-Power • Load-Force-Weight • Tension • Displacement
APPENDIX A: SCHEMATIC
ON-OFF
3W1W
3
6
2
AC INPUT
1
7
8
RANGE
LOW
SHOWN HIGH POSITION
2
1
7
8
4
3 6
5
NEU
CHASSIS
LINE
GND
.5A CAL
3W
.2A CAL
++ + +
EXTERNAL
CONTROL
INPUT
G
S
D
+
MED
HIGH
ADJUST
BRAKE
1
2
3
a
5V CALIBRATE
SW1
4
5
1
2
3
8
9
10
6
7
P3
4
5
1
2
3
8
9
10
6
7
J3
2
R14
5
R13
GND
V+
DP-650
DP 3
DP COM
IN -
IN +
M1
LP56-850
T1
P5
D
E
G
6VM2
B
K
F
J
L
H
PM1
F
D
G
B
E
J1
F
D
G
B
E
P1 15V
15V
8.45k
R18
1A CAL
1k
R20
35V
1
R15 2.0k R19
9.53k
R17
90.9k
R16
1N751A
CR2
1
C3
1.5k
R2
1
C5
U1
4
8
5.1K
R24
PE05
BR1
560
R1
1N5060
CR1 LM340T15
VR1
1000
C1
1
C2
35V
1N6295A
CR6
.001
C6
3
1
2
5
4
P2
1 3W
R25
3
1
2
5
4
J2
IRF740
Q1
J5
4
5
1
2
3
8
9
10
6
7
J4
4
5
1
2
3
8
9
10
6
7
P4
.001
C10
1k
R4
499
R5
SW2a
SW2b
5k
R6
J6 9.09K
R10
10M
R23
.001
C8
3+
-
21
LM358A
U1
.1
C7
1N5060
CR7
10k
R7
1N4735A
CR4
200
R9
47 pF
C9
1N4745
CR5
1k
R21
1N4148
CR9
1N4148
CR8 10k
R8
5+U1b
6-7
1
C4
1N821A
CR3
500
R22
1.5k
R3
15V
2.49k
R12
1.5k
R11
MAGTROL INC
70 Gardenville Parkway
Buffalo, New York 14224 USA
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
MAGTROL SA
Route de Montena 77
1728 Rossens / Fribourg, Switzerland
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
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