Parker OEM750, Руководство пользователя

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Installation • OEM750
20
VDC. With no external current limiting resistor, the current is
controlled by the applied voltage. This is due to a fixed voltage
drop of 1.7VDC on the opto LED and the internal series
resistor (243
Ω
). Increased voltage will result in increased
current.
Step Pulse Requirements
Operate the step pulse input within the following guidelines:
• 200 nanosecond pulse – minimum
• 40% – 60% duty cycle (2 MHz maximum pulse rate)
D
IRECTION
I
NPUT
S
IGNAL
S
PECIFICATION
While a positive voltage is applied to
DIR+
with respect to
DIR–
, the drive will commutate the motor in the clockwise
(positive) direction as it receives step pulses on its step input.
While zero voltage (or a negative voltage) is applied to
DIR+
with respect to
DIR–
, the drive will commutate the motor in
the counterclockwise (negative) direction as it receives step
pulses.
The input is optically isolated. It may be differentially driven.
CAUTION
Reverse voltage in excess of 6VDC may damage this device.
Your input driver must provide a minimum of 8mA at 3.5VDC
to ensure proper operation. With no external current limiting
resistor, the current is controlled by the applied voltage. This
is due to a fixed voltage drop of 1.5VDC on the opto LED and
the internal series resistor (243
Ω
).
Direction Change
The direction may change polarity coincident with the last
step pulse. The direction input must be stable for at least 200
microseconds before the drive receives the first pulse.
R
EMOTE
I
NPUT
The remote input is an optically isolated input. It requires a
minimum of 3.5 mA—
approximately 4.0 VDC —to ensure
proper system operation. This input may be differentially
driven.