Maxon 4-Q-DC Instructions Manual
maxon motor
maxon motor control 4-Q-DC Servo Control LSC 30/2
Order number 250521
Operating Instructions June 2010 Edition
The LSC 30/2 (Linear Servo Controller) is a linear
4-Q-Servoamplifier used to control DC motors up to
approx. 50 W that are powered by permanent magnets.
It allows the following operating modes:
• IxR compensation
• Voltage regulator
• Digital encoder control
• DC tacho control
• Current control
The required operating mode is easily selected using a DIP
switch.
There are also several ways of choosing the set value input:
• ± 10 V to connect to layout systems, such as a positioning
controller
• auxiliary voltages ± 3.9 V are already provided by the LSC
for use with external potentiometer
• well suited for fixed speed adjustment using internal
potentiometer
Its wide input voltage, ranging from 12 – 30 VDC, makes the LSC very flexible for use with different voltage
sources. The modular-style aluminum housing offers several fastening options, notably plugging into a 19”
rack (3HE). Separable screw terminal strips and a robust controller design make the amplifier ideal for
immediate use.
Table of contents
1 Safety Instructions ...........................................................................................................................................2
2 Technical Data .................................................................................................................................................3
3 Minimum External Wiring .................................................................................................................................4
4 Start-up Procedure...........................................................................................................................................6
5 Inputs and Outputs...........................................................................................................................................8
6 Operating Status Display ...............................................................................................................................12
7 Error Handling................................................................................................................................................12
8 EMC-compliant installation ............................................................................................................................13
9 Block Diagram................................................................................................................................................13
10 Dimension Drawing........................................................................................................................................14
11 Spare Parts List .............................................................................................................................................14
The latest edition of these operating instructions may be downloaded from the Internet as a PDF-file under
www.maxonmotor.com category Service & Downloads, Order number 250521 or
in the e-shop
http://shop.maxonmotor.com.
maxon motor
4-Q-DC Servo Control LSC 30/2 Operating Instructions
1 Safety Instructions
Skilled personnel
Only skilled, experienced personnel should install and start the equipment
Statutory regulations
The user must ensure that the amplifier and the components belonging to it
are assembled and connected according to local statutory regulations.
Load disconnected
For initial operation, the motor should be free running, i.e. with the load
disconnected.
Additional safety equipment
Any electronic equipment is, in principle, not fail-safe. Machines and
apparatus must therefore be fitted with independent monitoring and safety
equipment. If the equipment breaks down, if it is operated incorrectly, if the
control unit breaks down or if the cables break etc., it must be ensured that
the drive or the complete apparatus is kept in a safe operating mode.
Repairs
Repairs may only be carried out by authorized personnel or the
manufacturer. It is dangerous for the user to open the unit or carry out any
repairs.
Danger
Ensure that no apparatus is connected to the electrical supply during
installation of the LSC 30/2! After switching on, do not touch any live parts!
Max. supply voltage
Make sure that the supply voltage is between 12 and 30 VDC. Voltages
higher than 32 VDC or of the wrong polarity will destroy the unit.
Electrostatic sensitive device (ESD)
2 maxon motor control June 2010 Edition / Subject to change
maxon motor
Operating Instructions 4-Q-DC Servo Control LSC 30/2
2 Technical Data
2.1 Electrical data
Supply voltage VCC.....................................................................................................12 – 30 VDC
Max. output voltage.................................................................................................................25 V
Max. output current I
max
.............................................................................................................2 A
Max. power output .................................................................................................................50 W
It is advisable to consider mounting on a heat sinking surface if ambient temperature is high and
there is a high power loss in the LSC !
2.2 Inputs
Set value “+Set / -Set”.......................... configurable .......................-10 ... +10 V or -3.9 ... +3.9 V
Disable “Dis IN”.................................... Disable....................................................... min. V
CC
- 1 V
Enable..................................................... max. Gnd + 1 V
DC tacho “+T / -T”.................................................................................min. 2 VDC, max. 50 VDC
Encoder signals “Ch A / Ch B” .................................................................max. 100 kHz, TTL level
2.3 Outputs
Status reading “Ready” ........................ Open collector......................... max. 30 VDC (IL < 20 mA)
Error .......................................... “Ready” = high impedant
Ready........................................................“Ready” = Gnd
2.4 Voltage output
Auxiliary voltages “+Vaux / -Vaux” ..........................+3.9 VDC, max. 2 mA / -3.9 VDC, max. 2 mA
Encoder supply voltage “+Venc” ...................................................................+5 VDC, max. 80 mA
2.5 Motor connections
Motor +; Motor -
2.6 Trim potentiometers
n
max
IxR compensation
Offset
I
max
gain
2.7 Protection
Heat monitoring of power stage .......................................................................................T > 85°C
2.8 LED indicator
green LED.......................................................................................................................... READY
red LED............................................................................................................................. ERROR
2.9 Ambient temperature / humidity range
Operation ........................................................................................................................ 0...+45°C
Storage ........................................................................................................................-40...+85°C
No condensation ............................................................................................................. 20...80 %
2.10 Mechanical data
Weight...................................................................................................................... approx. 330 g
Mounting plate ......................................................................................................for 4 screws M4
Dimensions .............................................................................see dimension drawing,
chapter 10
2.11 Terminals
separable PCB terminals ................................................................................................... 16-pole
Pitch ..................................................................... 3.5 mm
suitable for wire cross-section....................... AWG 28-18
0.14 ... 1 mm2 multiple-stranded; 0.14 ... 1.3 mm2 single wire
June 2010 Edition / Subject to change maxon motor control 3
maxon motor
4-Q-DC Servo Control LSC 30/2 Operating Instructions
4 maxon motor control June 2010 Edition / Subject to change
3 Minimum External Wiring
Set
Dis +V
Dis I N
Sig Gnd
+
Vau x
Gnd
Set
Ready
T/ChA
T/ChB
Gnd
Ven c
1
234567890123456
11111
1
1
Motor
Motor+Vcc
+
Vau x
+
+
+
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
1
1
2
2
1
2
1313
1
2
1
2
12...30 VDC
IxR
Ta c h o
unten
Encoder
1234567 8910111213141516
1414
15
16
Ch ACh A
Ch BCh B
Gnd
+5 V
IxRTach oEncoderCurrent
Vol tag e
Regulator
Power
supply
3.1 Operating mode
maxon motor
Operating Instructions 4-Q-DC Servo Control LSC 30/2
3.2 Set value input
Set
Dis +V
Dis I N
Sig Gnd
+
Vaux
Gnd
Set
Ready
T/ChA
T/ChB
Gnd
Venc
1
234567890123456
11111
1
1
Motor
Motor+Vcc
+
Vaux
+
+
+
1 2 3 4 5 6 7 8 9 10111213141516
87
+3.9V
87
50k
Ω
int ernal
OFF
OFF
OFF
ON
ON
ON
65 9
-3.9V
0V
87
P3 Offset
with external
set vallue
-10 ... +10 V
external
with external
potentiometer
-3.9 ... +3.9 V
with internal
potentiometer
P3
internal
negative set value: motor turns counterclockwise
positive set value: motor turns clockwise
Set value -10 ... +10V
Motor turns counterclockwise
Motor turns clockwise
Motor turns counterclockwise
Motor turns clockwise
June 2010 Edition / Subject to change maxon motor control 5
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