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07. Curret and voltage selection
07
Current and voltage selection
Driver power supply max. voltage selection depend upon used SSM
and its required speed. This SSM optimal power supply voltage is
calculated by formula U= √ 32* (SSM phase inductance in mH) but
max. 80V. PL57 type SSM recommended voltage is 45V. PL86 type SSM
recommended voltage is 70V.
Power supply current shall be selected considering 50…70%
of SSM winding specified operating current. SSM operating current is
set by corresponding value in configuration program (Work_Current_
Min and Work_Current_Max). If no STEP signal is available more than
1 second driver is switched to sleep mode (AUTO-SLEEP mode) and
reduces winding current.
max. 20 mA current consumption, signal 2 ms min. time. SSM step is
performed at signal rising edge.
DIR signal parameters: Operating voltage 2.5V, 3.3V. 5V (connection
of additional current limiting resistor may be required), max. 20 mA
current consumption, 200 ns actuation time before/after STEP rising
edge.
ENABLE signal parameters: Operating voltage 2.5V, 3.3V. 5V
(connection of additional current limiting resistor may be required),
max. 20 mA current consumption, 100 ms actuation time. Logical unit
(inlet is energized) is SSM driver is ON and SSM windings are de-
energized, zero (nothing is generated or 0V at inlet) is SSM driver is ON
and SSM windings are energized.
