User`s manual

OPTICALLY ISOLATED INPUTS FAULT PROTECTION

The following inputs to the DPD60001 Driver Pack are Optically Isolated. The DPD60001 Driver Pack is internally protected against over temperature,

Item Pin #

Clock 5

Direction 6

On/Off 8

Reset 9

Note: All inputs musts be able to sink a minimum of 7mA.

TIMING

The Direction and Microstep Resolution Select inputs are synchronized with the

negative going edge of the Step Clock input. When the Step Clock input goes

low, the Direction and Microstep Select inputs are latched and further changes

to the inputs are ignored until the next falling edge of the Step Clock input.

After the Direction and the Microstep Select inputs signals are latched, the

DPD60001 looks to see if any changes have occurred. If a change has

occurred, the DPD60001 will execute the change before taking the next step.

Only AFTER the change has been executed will the step be taken. If no

change has occurred the DPD60001 will simply take the next step. This feature

works as an automatic debounce for the Direction and Microstep Select inputs.

The Reset and Enable(PWR) inputs are asynchronous to any input and can be

changed at any time.The Reset requires a minimum pulse width of 500 nS.

over/under voltage, and short circuits. The over temperature set point is

between 60EC and 70EC.

The short circuit protection consists of PHASE to PHASE, PHASE to

GROUND, and +V to PHASE.

In the condition where the DC voltage of the driver drops below +23 volts the

driver’s output stage will be disabled. When the driver’s DC voltage rises back

above 24 volts, the driver will automatically re-enable the outputs (if previously

enabled).

In the condition where the DC voltage of the driver exceeds approximately 82

volts, the driver will execute a fault.

If any fault is detected by the DPD60001, the motor outputs will be disabled and

can not be re-enabled without resetting or powering down the driver. At the

same time the open collector FAULT output is activated, as well as the red

FAULT LED .

OVER TEMPERATURE PROTECTION

The DPD60001 Microstep Driver Pack is a power device and is designed to

protect itself from overheating. It does this by monitoring the surface

temperature of the drive plate and will automatically shutdown if the

temperature reaches 65°C (152°F).

To prevent shutdowns, proper ventilation is required to maximize the air flow

into the Driver Pack.