LED 1 Green Power in on
LED 2 yellow Output is disabled
LED 3 Red Over-temperature fault detected
LED 4 Red Overload fault detected
LED 5 Yellow Home phase output
3.5 Amp Bi-polar stepper motor drive MSE570 Evo 2
The MSE570 is a low cost high performance Eurocard Bi-polar drive
designed for mounting in 3U high Euro-racks. Ideally suited for use
with Nema size 23 & 34 stepper motors, the unit provides a wide
range of current options. Designed for use by original equipment
manufacturers, the unit provides a reliable and economic in-service
proven’ drive solution. Furthermore, the MSE570 design enables
users to customise the unit to meet their exact requirements by
providing a series of up-grade options which can easily be
implemented.
Improved Output stage efficiency
The MSE570 Evo 2 features a chopped constant current output
stage with on-board current settings from 0.5 to 3.5 Amps per phase
to meet the requirements of virtually any 2 or 4 phase hybrid stepper
motor in the Nema 17, 23 & 34 frame sizes. The use of chopped
constant current drive techniques combined with the latest
developments in power stage technology results in significant
advances in efficiency. Furthermore, the output current may be
reduced via an external input when the motor is at standstill to
reduce temperature rise in the drive and the motor. The drive is
designed for use with rail voltages from 24 to 48 Vdc such as
MSE173 when up to 7 drives can be incorporated in a single rack
together with the power supply. For high speed operation the 35 Vdc
Power supply type MSE562 is recommended for single and dual axis
applications depending on motor current settings.
Choice of full or half step drive
The MSE570 may be set to operate in full step or half step drive. Half step drive is recommended since it provides
increased resolution ( 400 steps/rev. using conventional hybrid stepper motors ) together with improved smoothness and
damping of motor resonance.
Thermal Protection
A thermal sensor is fitted to prevent overheating of the output stages.
The drive may be automatically disabled on over-temperature by setting switch SW1-1 on.
Status LED’s for condition monitoring
Provision on the MSE 570 drive board has been
made for the user to add five status LED’s. These
may be soldered in location at the front edge of the
board to provide a visual indication of drive
condition. The function of each indicator is shown in
the table.
Customising the MSE 570 to meet individual application requirements
Choice of external or internal step control
In most applications MSE570 will be operated in conjunction with an external control source consisting of a clock pulse
train to determine rate and distance together with a direction signal. Where operation off line from the control processor is
required a print on the circuit board is provided for the user to add a simple voltage controlled oscillator to facilitate manual
control of the motor drive system.
Mclennan Servo Supplies Ltd. Tel: +44 (0)8707 700 700 www.mclennan.co.uk
New Features
• Increased efficiency
• No heatsink required
• reduces width
• Increased operating voltage
• Single rail supply for both logic
and motor
• Standard Thermal protection &
condition monitoring
Specification MSE570
Type without front panel
Type with front panel
MSE570 Evo 2
PM 570
Notes
Supply Voltage
Current consumption
Output Stage
Step logic
Vdc
Amps
15-42 + 10% max.
1-3 A
2 Phase Bi-polar
Full step / half step
Max ripple: 3 V peak/Peak
Depending on motor selected
Chopped constant current
Open circuit for full step
Logic Supply Voltage Vdc No separate supply required Use motor supply
Output Stage
Output current per phase
Step logic
Amps 2 Phase Bi-polar
0.5 to 3.5
Full step / half step
Chopped constant current
Set by on-board DIP switch
Open circuit for full step
Control signals CMOS Schmidt trigger @ 12V with 10KΩ pull-up resistors
& diode isolation
Logic 0: ( Low ) Volts 0 to 2 or contact closure to 0V
Logic 1: ( high ) Volts 9V to 30V max. or open circuit
Monitor Outputs
Low Level
High Level
Volts
Volts
Open collector NPN transistor
1 max.
Open Circuit
Referenced to 0V
@ 30mA max.
+ 24V max.
Auxiliary outputs Vdc
Vdc
Regulated +12 @ 50mA max.
Regulated + 5 @ 50mA max.
For use with on-board oscillator
Thermal Protection Standard Automatic shutdown protection
Condition monitoring Standard Via 5 way LED display
Up-grade options
On board Oscillator Optional
User fit options: refer to manual
Dimensions Mm 100 high x 160 long x 60 Std. Eurocard : Use12E wide panel
Typical Connections External Oscillator connections *
Note* Oscillator connections when circuit is fitted to MSE 570 Printed circuit board
Motor Supply ( 15 to 36 Vdc)
Phase A
Phase A’
Phase B
Phase B’
Sync input/output
Home output
Direction ( cw / ccw ) input
Step ( Clock ) input
Full/ half step input
Reset input
Output disable input
Current reduction input
Overload output signal
Over temperature output
Oscillator speed control input *
Oscillator clock output *
Oscillator base speed input *
Oscillator run/stop input *
+12 Vdc output ( 50 mA)
+ 5 Vdc output ( 50 mA )
Logic Supply ( 15-42 Vdc )
Connect to motor rail as
shown when < 24 Vdc
0V Common
Connector: 32 way a & c DIN41612 type D
C A
2 o o
4 o o
6 o o
8 o o
10 o o
12 o o
14 o o
16 o o
18 o o
20 o o
22 o o
24 o o
26 o o
28 o o
30 o o
32 o o
+12V
Pin 26a VR2 high speed set
Max
Min
0V
Pin 30a
Base speed
VCO input
Pin 22a
High speed
VR1
Base
base speed Speed
Pin 24a set
Stop
Pin 24 c Run
Oscillator Frequency
High / base switc
h
10 kHz Max typical setting
high speed
high
run stop switch
base speed
Time
Mclennan Servo Supplies Ltd. Tel: +44 (0)8707 700 700 www.mclennan.co.uk
Stepper motor drive current settings MSE570
The motor phase current can be set to suit the motor to be driven by the use of the on-board DIP switch fitted to the
MSE570. The table below shows the nominal phase currents for each setting
Switch
Setting
Nominal Current
per phase
Typical
Motor
Motor
Connections
Typical Power Supply
consumption @
SW2-1 SW2-2 SW2-3 SW2-4 ( Amps ) 36 Vdc ( Amps )
off off off off 0
off off off on 0.5 1.0
off off on off 0.9 17HS-020 4 lead 1.1
off off on on 1.2 23HS-102 parallel 1.2
off on off off 1.3 23HSX-102 parallel 1.3
off on off on 1.6 1.4
off on on off 1.85 17HS-240 4 lead 1.5
off on on on 2.1 23HS-104 parallel 1.6
on off off off 2.3 23HS-304 parallel 1.7
on off off on 2.5 34HS-109 series 2.0
on off on off 2.7 23HSX-202 parallel 2.2
on off on on 2.9 34HS-106 parallel 2.4
on on off off 3.0 34HS-209 series 2.5
on on off on 3.1 23HS-109 series 2.6
on on on off 3.3 23HSX-206 parallel 2.8
on on on on 3.5 23HS-309
23HSX-306
34HS-109
34HS-209
34HSX-108
34HSX-208
34HSX-312
parallel
parallel
parallel
parallel
parallel
parallel
series
3.0
Recommended motor-drive-connection combinations shown in BOLD
Rack mounting power supply MSE562
The MSE 562 is designed for mounting in a 3U high Eurorack and is
ideal for use with the MSE570 drive card. The unit will power up to 2
small motor axes or a single axis using a 34HS size motor. For
applications requiring multi-axis operation using a combination of
motors requiring high current settings the MSE173 Power supply is
recommended to drive up to 4 motors.
MSE562 provides a 35 Vdc motor rail for optimum high speed
operation using the MSE570 drive together with a 24 Vdc supply for
the drive’s on-board logic circuits.
Alternatively where a small motor is to be used with the PM546 Drive
to obtain ultra high speed operation the
70 Vdc rail may be utilised.
Specification
Width 142.2 mm ( 28E )
Depth 220 mm
Mounting 3U high rack installation
Connector DIN41612 type D ( 32 way a & c )
AC Supply 230 / 115 Vac 50 or 60 Hz.
Outputs:
5V +0.25 V 1.5A Max 100mV ripple max.
24V + 2.0 V 1.0 A Max. 2.5 V ripple max.
35V +3.0 V 3.0A Max 4.0 V ripple max.
70V +3.0 V 2.0 A Max 14.0 V ripple max.
Connections: Refer to handbook
Mclennan Servo Supplies Ltd. Tel: +44 (0)8707 700 700 www.mclennan.co.uk
