MSE570 data sheet
Page 4 of 5
Issue 002
Motor current setting
The output current per phase is normally set using a
four way DIP switch as follows:
Switch setting
Nominal output
SW2-1
SW2-2
SW2-3
SW2-4
current per phase
off
off
off
off
0.0A
off
off
off
on
0.5A
off
off
on
off
0.9A
off
off
on
on
1.2A
off
on
off
off
1.3A
off
on
off
on
1.6A
off
on
on
off
1.85A
off
on
on
on
2.1A
on
off
off
off
2.3A
on
off
off
on
2.5A
on
off
on
off
2.7A
on
off
on
on
2.9A
on
on
off
off
3.0A
on
on
off
on
3.1A
on
on
on
off
3.3A
on
on
on
on
3.5A
The above setting are approximate and may be
influenced by the motors resistance and inductance.
The output current should ideally be checked during
commissioning, using an analogue meter.
The motor current may be reduced from the value set on
the DIP switch by connecting a resistor from the current
program 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.
The external resistor should be selected to give the
required voltage on the current program input of
approximately 0.47 x required current per phase.
Thermal protection (user fit option)
A thermal sensor may be fitted to prevent overheating of
the heatsink and output devices. The sensor should be
a switching type that opens on excessive temperature
such as AIRPAX type 67L080, that operates at 80ºC.
This device may be clipped onto the heatsink bracket
and soldered into the location SW3.
This feature will give a warning on the overtemperature
output, that the heatsink is too hot. This condition may
be latched by setting switch SW1-2 (LT) on. The drive
may be automatically disabled on overtemperature by
setting switch SW1-1 on
Status LED’s (user fit option)
Provision has been made for the user to fit five status
light emitting diodes. These may be soldered into their
locations at the front of the board.
LED1
green
power is on
LED2
yellow
output is disabled
LED3
red
overtemperature fault detected
LED4
red
overload fault detected
LED5
yellow
home phase output
On board oscillator (user fit option)
A
simple
voltage
controlled
oscillator
may
be
constructed on the drive board by the addition of a few
components. These parts are located at the lower front
of the board at the edge and may be soldered in without
removal of the heatsink. The output of this oscillator may
be connected directly to the step pulse input (pin 14c).
Oscillator external controls
The external controls for the oscillator may be
connected via the 32 way DIN41612 connector or
alternatively, if front panel controls are required, may be
connected via a 5 pin MOLEX connector (P3).
+12V
P3-5 or pin 26a
VCO run/stop
P3-1 or pin 24c
VCO base speed
P3-2 or pin 24a
VCO speed i/p
P3-3 or pin 22a
0V
P3-4 or pin 30a
Max
Min
VR2 high speed set
High speed
Base speed
VR1 base
speed set
close for run
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