MSE570_1 Datasheet, PDF (3/5 Pages) List of Unclassifed Manufacturers – Bipolar Stepper Motor Drive Board

Monitor outputs
Pin 12 c
Home phase output. This output is low when the output
phases are in their initial home state pattern. This state
is repeated in four full steps or eight half steps.
Pins 20 a
Overload output. This output will go low and remain
latched low, if an overload or short circuit is detected.
The motor output will also be disabled. This condition
may be reset by either pulling the reset input low or
removing the power
Pins 20 c
Overtemperature output. This output will go low if the
thermal sensor option is fitted and the heatsink gets too
hot. This condition may be latched by setting SW1-2
(LT) on so that the drive doesn’t suddenly become
active when the heatsink cools. This condition may be
reset by either pulling the reset input low or removing
the power. The motor output may also be disabled
automatically by setting SW1-1 (DT) on. If no thermal
sensor is fitted then this output will be low.
Current programming
Pin 18 c
Current program input. The motor current may be
reduced from the value set on the DIP switch by
connecting a resistor from this input to 0V. This may be
used to set the phase current by the connector the unit
is plugged into, or to reduce the motor current on
application of an external signal such as at standstill.
Multi-axis synchronisation
Pin 12 a
Sync input/output. This connection may be used to
synchronise the chopping frequency between a number
of drive cards by connecting them together. One drive is
selected as the master; the others are slaves and
should have their chopping oscillators disabled by
setting SW1-4 on.
Auxiliary power outputs
Pin 26 a
Auxiliary +12V output. 50mA maximum.
Pin 26 c
Auxiliary +5V output. 50mA maximum.
On board oscillator (option)
Pin 22 a
VCO speed control input. Applying a control voltage
between 0V and +12V will proportionally vary the output
frequency of the voltage controlled oscillator (if fitted).
Pin 22 c
VCO output. This 12V CMOS output of the voltage
controlled oscillator (if fitted) may be connected directly
the step pulse input (14 c).
Pin 24a
VCO base speed control. A resistance to 0V sets the
base speed of the voltage controlled oscillator (if fitted).
Pin 24 c
VCO run/stop input. Pulling this input low enables the
voltage controlled oscillator (if fitted).
Configuration
A four way DIP switch is provided for certain
configuration options.
SW1-1 (DT)
Disable on overtemperature. If this switch is on and the
thermal sensor (option) gets too hot, then the motor
output will be automatically disabled to prevent
overheating. If no thermal sensor is fitted, then this
should be left off.
SW1-2 (LT)
Latch overtemperature. If this switch is on and the
thermal sensor (option) gets too hot, then the
overtemperature condition will be latched. This will
prevent unexpected re-energisation of the drive, when
the heatsink cools back down. The latched condition
may be reset by either pulling the reset input low or
removing the power.
SW1-3 (CC)
Current control type. This switch determines whether the
current control chopping is executed on the upper drive
transistors or the lower drive transistors. This would
normally be left off for more efficient use, but may have
small advantages of current control on low current
settings.
SW1-4 (SS)
Slave sync. If this switch is on, the chopping oscillator is
inhibited. This should only be used on slave units in
multi-axis synchronised systems, where another unit
provides a master chopping signal.
MSE570 data sheet
Page 3 of 5
Issue 002